"Coastal view, Cabrillo National Monument, 2015." by U.S. National Park Service , public domain
Cabrillo
National Monument - California
Cabrillo National Monument is at the southern tip of the Point Loma Peninsula in San Diego, California. It commemorates the landing of Juan Rodríguez Cabrillo at San Diego Bay on September 28, 1542. This event marked the first time a European expedition had set foot on what later became the West Coast of the United States.
Geology Field Guide for Cabrillo National Monument (NM) in California. Published by the National Park Service (NPS).
https://www.nps.gov/cabr/index.htm
https://en.wikipedia.org/wiki/Cabrillo_National_Monument
Cabrillo National Monument is at the southern tip of the Point Loma Peninsula in San Diego, California. It commemorates the landing of Juan Rodríguez Cabrillo at San Diego Bay on September 28, 1542. This event marked the first time a European expedition had set foot on what later became the West Coast of the United States.
In 1542, Juan Rodriguez Cabrillo climbed out of his boat and onto shore, becoming the first European to set foot on what is now the West Coast of the United States. Cabrillo National Monument not only tells the story of this 16th-century exploration but also houses a wealth of cultural and natural resources. Join us and embark on your own Voyage of Exploration.
FROM DOWNTOWN SAN DIEGO Take Harbor Drive past the airport Turn left onto Rosecrans Street Turn right onto Canon Street Turn left onto Catalina Blvd. (also known as Cabrillo Memorial Drive) Follow Catalina Blvd. all the way to the end
Visitor Center and View Building
The Visitor Center at Cabrillo National Monument is the perfect place to get oriented to the park. Rangers and volunteers are always available to answer questions and provide suggestions on what to do. Here you can: • Find the day’s schedule of auditorium programs and ranger talks • Get your National Parks Passport book stamped • Chat with a ranger • Pick up a Junior Ranger activity for kids • Find out when low tide is • Visit the park store • Many other things!
FROM DOWNTOWN SAN DIEGO Take Harbor Drive past the airport Turn left onto Rosecrans Street Turn right onto Canon Street Turn left onto Catalina Blvd. (also known as Cabrillo Memorial Drive) Follow Catalina Blvd. all the way to the end
Rocky Intertidal Zone
Tidepools at Cabrillo
Low Tide at the Tidepools
Sunset at Cabrillo
Sun setting over the Pacific
Sunset at Cabrillo
Dusk at the Old Point Loma Lighthouse
Dusk at the Old Point Loma Lighthouse
Dusk over the Old Point Loma Lighthouse
Old Point Loma Lighthouse
Spring flowers in front of Old Point Loma Lighthouse
Spring flowers in front of Old Point Loma Lighthouse
View from Cabrillo
Looking out on San Diego from Cabrillo
View looking over to Coronado from Cabrillo
Pelican Point
View of Pelican Point at Cabrillo
Pelican Point at Cabrillo National Monument
2013 Recipients: George and Helen Hartzog Awards for Outstanding Volunteer Service
More than 200,000 volunteers provide invaluable time and energy to the National Park Service. Meet the people and groups being honored with a 2013 Hartzog Award.
Group of cleanup volunteers with full trash bags
NPS Geodiversity Atlas—Cabrillo National Monument, California
Each park-specific page in the NPS Geodiversity Atlas provides basic information on the significant geologic features and processes occurring in the park.
waves breaking on coastal bluffs
Cabrillo Peregrine Pair Raises Four Chicks
Starting each February, Cabrillo National Monument volunteers and natural resources staff eagerly await low or minus tides, but not for the excellent tidepooling as you might expect. Rather, it is the opportunity to hike out on otherwise submerged rocks for a view of the cliffs above. There, they can record sightings of a pair of the world’s fastest animals, peregrine falcons, which have nested on the cliff since 2014.
One juvenile peregrine falcon preparing to land near one of its siblings at the top of a cliff
Investigating Ocean Acidification in the Rocky Intertidal
<em>July 21, 2016</em> - Cabrillo National Monument and Channel Islands National Park are concerned about the impact that ocean acidification will have on their intertidal communities and the ability of their visitors to enjoy a seascape rich in marine life. They already monitor key rocky intertidal species, but to understand the dynamics of ocean acidification in the rocky intertidal and how the monitored species are responding, a new type of monitoring has become necessary.
A freshly collected interidal seawater sample.
Recording Echolocation Calls to Learn About Bats in Cabrillo National Monument
<em>March 15, 2017</em> - Cabrillo National Monument boasts a surprisingly high number of bat species for its small size. National Park Service and San Diego Natural History Museum biologists recently teamed up to monitor and inventory the area’s bat populations. By recording bat echolocation calls, biologists identified ten species, including a new species for the area. They also discovered a distinct seasonal peak in the number of bat calls.
Segment of a bat call sonogram
Shaw’s Agave – A Species on the Edge
<em>March 15, 2017</em> - Shaw’s agave is a species of concern that is literally and figuratively on the edge along the Southern California coast. One of its northernmost populations occurs in the rare coastal sage scrub community near the boundaries of Cabrillo National Monument. Recruitment of new individuals to in the local population has declined to zero. Cabrillo and San Diego Natural History Museum biologists are now trying to find out why.
Researcher hand pollinating a Shaw's agave flower
The Guns of San Diego at Cabrillo National Monument
Constructed during World War II, this concrete and steel fire control station was most important in Harbor Defenses of San Diego in that the battery commander of 16-inch-gun Battery Ashburn operated from the top level (BC3) directing the fire of his guns. The lower level (B1/3 S1/3) served as one of five base end stations for Ashburn.
16 inch gun emplacement at Cabrillo National Monument
Other Colors at Cabrillo National Monument
Winter rains have brought color to Cabrillo National Monument in more ways than one. Most of all, monument staff have been noticing bright spots of orange and red moving among the amazing display of flowers. Some of the spots are covered in black and white fuzz and organized in a long series of rows. Other dark orange spots appear at either end of a smooth, black, orange-lined body. Upon closer inspection, these bursts of color belong to two different kinds of caterpillars.
Close-up of the orange head of a white-lined sphinx moth caterpillar
A New Species for Cabrillo National Monument
Each month on a Monday, a team of Cabrillo National Monument biologists and volunteers head out to the field to begin a week of pitfall trapping. Most often, they find common lizards and a lot of small mammals. Sometimes, a bucket will contain a snake or a salamander. This season, diversity has been particularly high. The team also found a species that had never been recorded in more than 20 years of pitfall trapping.
Botta's pocket gopher peeking out of a plastic cup
This Shrub is Not Getting Enough Fire. Humans and Hot Water are Helping.
The wart-stem ceanothus is an evergreen shrub native only to San Diego County and Northern Baja California. As a species that requires fire to germinate, it is also threatened in San Diego County by fire suppression, as well as by urbanization. As a result, Cabrillo National Monument is taking steps to help.
A view of the flower clusters on the branches of the wart-stem ceanothus.
City Nature Challenge at Cabrillo National Monument – A Celebration of Science for the Entire Community
With the growing popularity of citizen science National Park Service scientists are employing the power of the people to help them solve the problems they face. Read on to learn about one such project that just concluded at Cabrillo National Monument.
A mother uses iNaturalist to take a photo of a tidepool organism as her two children explore
Wildland Fire in Chaparral: California and Southwestern United States
Chaparral is a general term that applies to various types of brushland found in southern California and the southwestern U.S. This community contains the most flammable type of vegetation found in the United States.
Chaparral on steep rocky slopes.
What the Beeps Tell Us: Tracking Rattlesnakes at Cabrillo National Monument
A Masters student in the Department of Biology at San Diego State University, Roman Nava works in the lab of Population Ecologist Dr. Rulon Clark. One of the main goals of this lab group is to understand how animal populations are connected and restructured as an effect of human habitat fragmentation. In Roman’s case he focuses on one of Cabrillo National Monument’ s top predators – the Southern Pacific rattlesnake.
Researcher on a hillside holding a metal antenna
Microplastics on National Park Beaches
Every beachgoer has probably noticed plastic trash littering their favorite beaches, however remote. A new study of microplastic distribution on national park beaches indicates that whichever one you visit, there is probably also some amount of plastic that is harder to see, mixed in with the sand between your toes.
Microplastic piece and organic matter
Field Season Beginning for Mediterranean Coast Plant Monitoring Teams
<em>March 15, 2017</em> - Even for drought tolerant southern California plant communities, four dry years in a row was a lot to handle. Annual vegetation monitoring at each of the three parks in the Mediterranean Coast Inventory and Monitoring Network recorded significant dieback in some places. This year, however, rainfall has been well above average throughout the region. Monitoring teams are excited to survey in a much more brightly colored landscape.
Shooting stars decorated in water droplets
Local Students Join Restoration Efforts at Cabrillo National Monument
In an effort to preserve and protect vulnerable park resources, Cabrillo National Monument partnered with students from High Tech High Media Arts (HTHMA) in a large-scale native plant propagation and restoration effort.
Night Sky Darkness in Coastal Southern California National Parks
The velvet black of a dark night sky offers many values. People seek darkness for stargazing. Birds navigate by starlight. Prey hides from predator in the dark. But light pollution from human development—streetlights, buildings and other sources of artificial light—is spilling over into natural areas and taking an ecological toll. In Southern California, the National Park Service monitors the night sky of its parks and applies best practices to improve night sky darkness.
Portion of the Milky Way visible over mountaintops in the Santa Monica Mountains.
Cabrillo Hosts Cutting-Edge Genetics Research
The rare Shaw's agave grows only in coastal southern California and northern Mexico. It has declined because of human activities and natural erosion. Managing this species—including a population in the park that was established in the 1970s with transplants from unknown sources—depends on knowing how genetically variable are the plants and soil microbes that provide nutrients, and how populations are related to each other.
Rubber-gloved fingers drop a small, freshly clipped piece of agave into a plastic vial.
Shaw's Agave: A Cross-border Botanical Gem
Shaw’s agave is a rare and unique succulent plant endemic to a narrow, 200 mile, stretch along the southwestern California and northern Baja California coastline. South of the border, it is commonly found along the undeveloped portions of the western coast of Baja California. North of the border, however, the species has been reduced to just two small and isolated populations, one of which consists of a single genetic individual.
Large Shaw's agave plants, in black and white.
Cabrillo Intertidal Bioblitz 2016: The Maiden Voyage
On March 6th, 2016, Cabrillo National Monument was proud to successfully host one of the first National Park Bioblitz events of the year in our rocky intertidal zone. This BioBlitz is part of a larger effort coordinated by the National Park Service (NPS) to celebrate the NPS Centennial. This event and others like it are great opportunities to learn more about the biodiversity of a park and contribute to our greater understanding of the biodiversity of the nation.
Pollinators - Hummingbirds
Hummingbirds (family Trochilidae) are amazingly adapted pollinators, and they play an important role in pollination.
A flying hummingbird hovers next to a red flower
2016 Urban Island Bioblitz Results
On May 21-22, 2016, Cabrillo National Monument and several other park units hosted a Centennial Bioblitz event. Utilizing the biodiversity observation application, iNaturalist, explorers of all ages made their way to Cabrillo to discover biodiversity in their National Park. Thanks to an incredible team of over 157 scientists, exhibitors, and volunteers, over 1706 observations spanning 427 species were documented throughout the 24-hour Bioblitz period landing us in 3rd place.
MiniBlitz- Connecting Students to Science
In preparation for the 2016 National Parks Centennial Bioblitzes occurring around the country this week (May 16-22nd, 2016), the science education staff at Cabrillo National Monument hosted a “MiniBlitz” in our local community. Staff members were excited to collaborate with four – 4th and 5th grade classrooms at the local elementary schools, High Tech Elementary and Explorer Elementary.
iNaturalist: Become a Citizen Scientist at Cabrillo
At Cabrillo National Monument, we created a “how-to” instructional video to guide students and visitors in creating and using their iNaturalist account. Available in both English and Spanish, these videos will help support explorers in creating observations and taking notes about local flora and fauna.
National Parks Defend America's Coast During World War II
Many national park sites joined the war effort in World War II by erecting Aircraft Warning, radio and radar stations. Some historic forts came to life with coastal defenses ready to defend the nation.
color photo of explosion atop a fort wall, ocean beyond
Celebrating soils across the National Park System
First in a series of three "In Focus" articles that share insights into the near-universal and far-reaching effects of soils on the ecology, management, and enjoyment of our national parks.
Fossil soils at Cabrillo National Monument reveal marine deposits
Conserving pinnipeds in Pacific Ocean parks in response to climate change
The evolutionary record from previous climate perturbations indicates that marine mammals are highly vulnerable but also remarkably adaptable to climatic change in coastal ecosystems. Consequently, national parks in the Pacific, from Alaska to Hawaii, are faced with potentially dramatic changes in their marine mammal fauna, especially pinnipeds (seals and sea lions).
black harbor seal
The Giant Owl Limpet: Keystone of the Intertidal
A "keystone species" is defined as one so critical to an ecosystem that without it, the system would change dramatically. These are the species that hold a biome together. Their presence or absence has a disproportionate impact on the other organisms within the system and on the system at large. It is always tempting to imagine these incredibly important organisms as proportional in size to their huge role in the ecosystem; however, that is not always the case.
Two large marine snails on a boulder as the sun sets on the tidepools beyond.
National Park Service Commemoration of the 19th Amendment
In commemoration of the 100th anniversary of the passing of the 19th Amendment the National Park Service has developed a number of special programs. This includes online content, exhibits, and special events. The National Park Service’s Cultural Resources Geographic Information Systems (CRGIS) announces the release of a story map that highlights some of these programs and provides information for the public to locate and participate.
Opening slide of the 19th Amendment NPS Commemoration Story Map
Cabrillo National Monument Visitor Center Historic District Cultural Landscape
The Cabrillo National Monument Visitor Center Historic District, constructed in 1963-1967, offers commanding views of the San Diego coast as well as interpretive exhibits and programs. NPS
A paved trail leading to a building on a hill.
Plan Like a Park Ranger - Top 10 Tips for Visiting Cabrillo National Monument
Plan Like a Park Ranger at Cabrillo National Monument, the only National Park in San Diego, California.
A white lighthouse on a bluff with a pine tree on the left and blue sky.
West Coast National Parks Work with NOAA to Better Understand Ocean Acidification in the Rocky Intertidal and Beyond
Ocean acidification (OA) is a huge threat to marine life. But it is hard to track remotely on a large scale. So this summer, seven West Coast national parks are teaming up with the 2021 NOAA West Coast Ocean Acidification Cruise. They’ll collect water samples in-person to check several OA indicators. Their data will help paint the most detailed picture yet of OA conditions up and down the coast, from parks’ rocky intertidal zones to dozens of miles offshore.
Collage of different rocky intertidal creatures photographed against a white background.
Latino Conservation Week at Cabrillo National Monument
A person’s cultural background and identity shapes the lens with which they view the world. This is particularly apparent at Cabrillo National Monument, as the history of Juan Rodriguez Cabrillo illustrates the complexities of identity through history. Originally thought to be Portuguese, recent historical research has revealed that he said he was from Spain.
An Ocean on the Edge
Along the northwestern tip of the continental United States, large rocky stacks rise like sentinels from the mist. Shrouded in beauty and wonder, the expansive coastline of Olympic National Park sets a dramatic stage for the convergence of several unique ecosystems. Pristine, glacier-capped mountains painted in lush rainforests descend swiftly into the crashing waves where land meets sea. This is where our story begins.
Black-and-white photo of impressive rocky stacks rising up above an expansive coastline.
2020 George and Helen Hartzog Awards for Outstanding Volunteer Service
Each year nearly 300,000 volunteers across the National Park Service (NPS) donate more than 6.5 million hours of service, for a value of more than $185 million. Through their extraordinary work and dedication, these volunteers make an exceptional contribution to their parks and communities. We are pleased to congratulate the national recipients of the 2020 George and Helen Hartzog Awards for Outstanding Volunteer Service.
Photo of Tom and Karen Hartley dressed in period clothing standing and smiling outdoors.
POET Newsletter September 2014
Pacific Ocean Education Team (POET) newsletter from September 2014. Articles include: Sea Star Wasting Disease; Corallivore: Crown of Thorns Starfish Wreak Havoc in American Samoa — The NPS Responds; Seafloor in 3D; and Coral Bleaching Monitoring on Guam.
A large, red-colored sunflower sea star that appears to be melting or disintegrating.
Series: Pacific Ocean Education Team (POET) Newsletters
From 2009 to 2015, the Pacific Ocean Education Team published a series of short newsletters about the health of the ocean at various National Park Service sites in and around the Pacific Ocean. Topics covered included the 2010 tsunami, marine debris, sea star wasting disease, ocean acidification, and more.
Ocean waves wash in from the right onto a forested and rocky shoreline.
POET Newsletter February 2014
Pacific Ocean Education Team (POET) newsletter from February 2014. Articles include: A Beacon of Light for the Channel Islands; A Challenging Place; Isolation within Isolation; Destruction Island Lighthouse
A black and white historic photo of the Destruction Island lighthouse tower on a bluff top.
Event Recap - Stories of Service: Empowering Youth and Young Adults to Be the Future Face of Volunteering in National Parks
The National Park Service Youth Programs Division co-hosted a virtual event, “Stories of Service: Empowering Youth and Young Adults to Be the Future Face of Volunteering in National Parks” on November 10, 2021 with the National Park Service Volunteers-In-Parks Program (VIP) in partnership with the National Park Foundation (NPF). A diverse panel shared their stories of volunteering in parks and the impacts these experiences have had on them.
Screenshot of speakers and panelists from Nov. 10 Volunteers Event
Changing Patterns of Water Availability May Change Vegetation Composition in US National Parks
Across the US, changes in water availability are altering which plants grow where. These changes are evident at a broad scale. But not all areas experience the same climate in the same way, even within the boundaries of a single national park. A new dataset gives park managers a valuable tool for understanding why vegetation has changed and how it might change in the future under different climate-change scenarios.
Green, orange, and dead grey junipers in red soil, mountains in background
Dare to Imagine: Dr. Linh Anh Cat
Meet Dr. Linh Anh Cat, the Chief of Resources Management and Science at Cabrillo. She had no examples of what path she should take, but she always trusted her instincts on what was right and now works on increasing our understanding of fog in the context of climate change. This article is part of Dare to Imagine, a National Park Foundation grant-funded project dedicated to highlighting women in parks who are breaking barriers and showing what a scientist looks like.
a graphic of woman on rocky coast. Text Reads Dr. Linh Anh Cat Chief of Resources Management
Dare to Imagine: Samantha Wynns
Read about Samantha's STEM summer program for underrepresented girls and how taking one day, one application, one new job at a time helped her overcome her fears. This article is part of a National Park Foundation funded project called the Dare to Imagine project dedicated to highlighting women in parks who are breaking barriers and showing what a scientist looks like.
blue graphic with young woman's photo. text reads: Samantha Wynns Conservation Biologist
Maria Arcadia Israel
María Arcadia Alipás Israel’s experiences embody the nature of the work at the old Point Loma Lighthouse during the initial decades of California statehood. She lived and worked in the lighthouse for 18 years, for a time as assistant lighthouse keeper, and her presence is still evident at the site today through displays of her craftwork.
Round shell artwork with flowers wrapped around a view of buildings and a grassy field
The EcoLogik Project
The world is changing at a prodigious rate. Climate change is accelerating and ecosystems across the globe are on the brink of collapse. In order to solve these significant global issues, we need everyone’s efforts—every voice at the table. Unfortunately, not everyone is welcome or feels welcome at the table—there is a disconnect of women and female identifying representation in science fields. Out of this disconnect, the EcoLogik Project was created.
Young female student participant engages with a snake ambassador.
The Great Bee Quest
In September 2020, Cabrillo National Monument—San Diego’s only national park—participated in the 2020 Parks for Pollinators BioBlitz organized by the National Recreation and Park Association. It was during this month-long, concentrated, species documentation effort that park naturalist Patricia Simpson made the original discovery of a red-and-black bee with which she was unfamiliar. This observation spurred a community-wide effort to locate and identify the elusive red bee.
The sun shines over a rocky ridge with bunches of bright yellow flowers in the foreground.
Series: Women's History in the Pacific West - Lower Colorado Basin Collection
Biographies of women in parks from southern California, southern Nevada, and northwest Arizona
Map of southern California, southern Nevada and northwest Arizona
3 Parks 3 Stories
Like you, we love our National Parks and all of the wonderful flora and fauna that live within them. Our mission is to protect and preserve these natural resources for this and future generations. That’s a big task! Have you ever wondered how we at the National Park Service keep tabs on the status of everything that lives within the park?
Rocky reef habitat with red and green leafy seaweed before a deep blue ocean on the horizon.
Through the magnifying glass: understanding conservation on a microscopic scale
<strong>If you go too fast, you might miss it.</strong> If you forget to look close enough, you might miss it. It’s the miniature, but bright-eyed, jumping spider hiding amongst the blooming flowers of buckwheat. It’s the neon sea slug only as big as a pink jelly bean feeding in the seagrass, overlooked despite its vibrant coloration. It’s a world of easily overlooked species, a microcosm teeming with life, secrets, and wonder.
Extreme close-up of a wasp's face just within a tunnel in the sand.
Project Profile: Increase Native Seed Production for 14 California Parks
The National Park Service is collaborating with a range of partners to increase regional production capacity for appropriate native plant seed to restore native coastal prairies, interior grasslands and wet meadows, habitat for threatened and endangered species, and provide capacity for post-fire recovery.
a person stands in a field of tall grass
Project Profile: Restoring Wildlife Habitat in 7 Parks in Washington and California
The National Park Service will restore highly sensitive habitats along 13 trails and two campgrounds through native plant revegetation and trail stabilization and re-routing. By restoring habitat and damaged riparian zones along heavily impacted trails and in over-capacity campgrounds, this project will prevent further erosion, redirect visitor use, protect fragile habitats that harbor numerous endangered species, and enhance visitor safety, enjoyment, and access.
a sloping coastal beach habitat in California with buildings and a parking area along the shoreline
Project Profile: Collect and Curate Native Seed for Fourteen California Parks
The National Park Service will collect and curate seeds to support native plant materials development and subsequent restoration at 14 national park units across California.
seed crew collects seeds under tree cannopy
To Preserve and Protect: Exploring Stewardship and Restoration of Our National Parks
For over one hundred years, the National Park Service has been entrusted with the mission of preserving and protecting America’s most beautiful places for the enjoyment of this and future generations. From the awe-inspiring geysers of Yellowstone to the giant kelp forests of the California Channel Islands, the charge of preserving these natural wonders, especially in the face of global environmental threats, is no small task.
3 photos:Potted Succulents. Plants in greenhouse mesh. Piney plants restored on a sandy slope.
Seven National Parks Collaborate on Project to Accomplish Shared Restoration Goals
Bipartisan Infrastructure Law funds will support restoration projects in seven national parks across California and Washington. The involved parks demonstrate one or more of the following project objectives: ‘keep wildlife wild’, endangered species habitat restoration, and improving visitor access and enjoyment of parks.
coastal beach habitat sloping down towards the ocean
50 Nifty Finds #38: A Germ of an Idea
A lot of articles have been written about the history of the National Park Service (NPS) arrowhead emblem. Many recycle the same content and outdated information that has largely come from the NPS itself. Challenging the traditional story has revealed new sources of information—and two previously overlooked arrowhead designs—that rewrite the arrowhead origin story.
Wooden arrowhead plaque on stand
Unlocking Earth's Secrets, Layer by Layer
Those splendid rocks in our national parks aren’t just scenic wonders; they’re scientific and cultural treasures. A new geological inventory could help protect them.
Two women with helmets look at a multi-layered rock cliff
Plan Like a Park Ranger - Top 10 Tips Tidepool Edition!
Read about the top 10 tips for exploring the tidepools at Cabrillo National Monument.
A Park Ranger standing in the rocky intertidal at low tide.
BIO - DIVERSE - CITY
Over the past 10 years, the Southern California Research Learning Center has worked earnestly to foster landscape-level connections that will preserve the biodiversity of the southern California region – through research, community engagement, and building strategic partnerships. Here are the stories of where the SCRLC has come so far in meeting these objectives and where it is headed into the future.
City of San Diego skyline on left side with anemone and abalone photo on right.
50 Nifty Finds #45: Holding the Line
The National Park Service (NPS) was only 26 years old when the United States entered World War II. The young bureau faced very real threats to its mission, with increasing pressure to contribute its natural and cultural resources to the war effort even as its budget and staff were slashed. Under the leadership of Director Newton B. Drury, the NPS was able to do its part for the war while maintaining its public trust responsibilities to the American people.
Worth Fighting For fire prevention poster
Updated Species Database Will Help Boost Amphibian Conservation Across the National Park Service
To steward amphibians effectively, managers need basic information about which species live in parks. But species lists need constant maintenance to remain accurate. Due to recent efforts, the National Park Service now has an up-to-date amphibian species checklist for almost 300 parks. This information can serve as the basis for innumerable conservation efforts across the nation.
A toad sits on red sand, looking into the camera.
Cabrillo National Monument
National Park Service
U.S. Department of the Interior
Visitor Guide
Spring/Summer 2016
Photo By Bill Griswold
Meet Cabrillo’s New Superintendent!
Contact Us
The National Park Service has
selected Andrea Compton to
be the next superintendent of
Cabrillo National Monument in
San Diego.
Joshua Tree National Park’s chief
of resources management, where
she oversaw natural and cultural
resources in Joshua Tree’s Mojave
and Sonoran desert ecosystems.
“Andrea’s proven leadership in
park management and experience
with the partners, communities,
and cultural heritage of San Diego
makes her the ideal leader to take
Cabrillo National Monument into
the National Park Service’s second
century,” said Martha Lee, Pacific
West Region Deputy regional
director.
“Cabrillo represents a beautiful
blend of natural environments
on land and in the water, which
together with its rich stories and
artifacts represent a part of San
Diego’s amazing history,” said
Compton. “I am delighted and
honored to have been selected
for this position. I look forward to
rejoining the wonderful staff,
volunteers, Cabrillo National
Monument Conservancy and
Cabrillo National Monument
Foundation associates, and the
many park partners to celebrate
and enjoy San Diego’s national
Compton is returning to Cabrillo
National Monument, where she
began her National Park Service
career in 2002. She left the park
in 2009 to assume the job of
park.”
Prior to joining the National Park
Service, Compton worked at Mesa
College where she taught general
biology, and at San Diego State
University where she worked with
the Field Stations Program. Her
business experience includes
work with an environmental
consulting firm in Portland,
Oregon. She holds a master’s
degree in fishery and wildlife
biology from Colorado
State University and a bachelor’s
degree in animal ecology from
Iowa State University.
Welcome aboard, Superintendent
Compton!
What’s Inside?
Mailing Address
Support Your Park..........2
Cabrillo National
Monument
Visitor Information........3
Centennial.......................3
1800 Cabrillo Memorial
Drive
Calendar of Events........4
San Diego, CA 92106
News..................................4, 5
Phone
619-557-5450
Annual Passes................6
Park Website
www.nps.gov/cabr
Park Map..........................7
Junior Ranger.................8
Support Your Park
Support Park Partners
Volunteer
Join us for a volunteer event!
Support your local National Park
and get involved for one day,
one year or the rest of your life.
More than 400 active volunteers
help maintain the park’s natural and cultural resources. They
participate in a variety of projects
and represent Cabrillo National
Monument throughout San Diego.
In 2016, the VIP program will
host Centennial Service Days
to encourage everyone in the
community to come out and
volunteer at the park.
To learn how you can help visit
www.nps.gov,
vipvoice.wordpress.com
or email us at
cabr_volunteers@nps.gov
The Cabrillo National Monument
Foundation (CNMF) is a private
nonprofit organization which
provides support for special
projects at Cabrillo National
Monument. Since 1956 CNMF has
helped the National Park Service
with numerous educational and
scientific activities at Cabrillo
National Monument. The
Foundation has published several
award winning books on historic
and scientific topics relating to
the Monument. Revenue for
these projects comes through
donations, memberships and
sales of publications and other
educational items. CNMF is one
of many National Park Service
Cooperating Associations in the
U.S.A; these organizations work to
enhance the visitor’s experience
at the National Parks.
www.cnmf.org
The Cabrillo National
Monument Conservancy
(CNMC) is an organization
initiated on the 4th of July,
2012 by a group of folks
who believed it would be
financially advantageous to
Cabrillo National Monument
Support Park Partners
Trails & Rails is an innovative
partnership program between
the National Park Service and
Amtrak. This program provides
rail passengers with educational
opportunities that foster an
appreciation of a selected region’s
natural and cultural heritage; it
promotes National Park Service
areas and provides a valueadded service to encourage train
ridership. It also renews the long
tradition of associating railroads
with National Parks.
www.nps.gov/trails&rails
The San Diego Maritime Museum, in partnership with Cabrillo
National Monument, built an
historically accurate, fully sailable replica of the San Salvador.
Construction of the galleon was
The San Diego Natural History
Museum traces its roots to an
enthusiastic group of amateur
naturalists, who formed the San
Diego Society of Natural History
in 1874.
It’s mission is to interpret the
natural world through research,
education and exhibits; to
promote understanding of
the evolution and diversity of
southern California and the
peninsula of Baja California;
and to inspire in all a respect for
nature an
Cabrillo
National Park Service
U.S. Department of the Interior
Cabrillo National Monument
Life in the Rocky Intertidal Zone
Tidepools provide a home for many animals. Tidepools are created by the
changing water level, or tides. The high energy waves make this a harsh habitat,
but the animals living here have adapted over time. When the earth, sun and
moon align during the full and new moon we have extreme high and low tides.
Generally, there are two high tides and two low tides a day. An example of low
and high tide is seen on the right.
There are three zones within the tidepools: the high zone, the middle zone, and
the low zone. Animals are distributed based on their adaptations to different
living (competition and predation) and no living (wave action and water loss)
factors. The tidepools at Cabrillo are protected and have been monitored by the
National Park Service since 1990. You may notice bolts in the rocky intertidal,
these are used to assist scientists in gathering data to monitor changes.
Low Tide
Tidepool Etiquette:
Human impact can hurt the animals. As you explore the tidepools, you may
touch the animals living here, but only as gently as you would touch your own
eyeball. Some animals may die if moved even a few inches from where they are
found. Federal law prohibits collection and removal of any shells, rocks and
marine specimens. Also, be aware of the changing tides, slippery rocks and
unstable cliffs. Have fun exploring!
The high zone is covered by the highest tides. Often this area is only sprayed by the crashing
waves. The animals who live here must endure a long time without water. Below are common
examples of what you can find in the high zone.
High Zone
(Supralittoral or
Spray Zone)
Mussels and
Barnacles
High Tide
Thatched Barnacles
Periwinkles
Gooseneck Barnacles
Acorn Barnacles
Owl Limpet
Conspicuous Chiton
Limpets
Shore Crab
Chiton
*Photos are not to scale. Thank you to the Tams
for most of these photos.
The best time to visit the tidepools is during the
new or full moon; a negative low tide is
recommended for the best exploring.
Isopod
Hermit Crab
If you are interested in learning more, visit the
tidepool education table or volunteer to help
protect this unique and beautiful place.
For volunteer opportunities contact:
Cabr_volunteers@nps.gov
Middle Zone
(Littoral Zone)
The middle zone is covered by the highest tides and exposed by the lowest tides. The
animals here have to be able to live both in and out of water. The anemones close up and
cover themselves in bits of shell and other debris in order to retain moisture during low
tide. Below are some examples of species in the middle zone.
Solitary Anemone
Brooding Anemones
Closed
Sea/Surf Grass
Sea Bubble
Low Zone
(Sublittoral or
Subtidal Zone)
Scaly Tube Snail
Aggregate Anemones
Closed
Open
Black Tegula Snail
Sea lettuce
Kellet’s Whelk
Feather Boa Kelp
Coralline Red Algae
Sponge Weed/
Dead Mans’ Fingers
Sandcastle Worms
Sargasso Weed
Keyhole Limpet
The low zone is only uncovered during the lowest tides. Animals here are submerged in
water most of the time. Some of the animals in this zone like to hide under surfgrass
because it provides shelter. Below are some animals found in the low zone.
Knobby Sea Star
Brittle Star
Sea Urchin
Bat Star
Opalescent
Nudibranch
Brown-Ringed
Nudibranch
Rosy Nudibranch
Yellow Umbrella Slug
Opaleye
Open
Wooly Sculpin
Garibaldi
California Moray Eel
California Sea Hare
Chestnut Cowry
This brochure was made possible through the work of Katie Eskridge, a Girl Scout who used the tidepools as the subject for her Gold Award Project .
EXPERIENCE YOUR AMERICA
™
Kelp Crab
Octopus
Cabrillo
National Park Service
U.S. Department of the Interior
Lizards
Cabrillo National Monument
Reptiles and Amphibians
Cold-blooded, not cold-hearted.
The Coastal Sage Scrub environment at Cabrillo National
Monument supports a diverse community of mammals, birds,
amphibians and reptiles. This handout will serve to provide you
with important and interesting information about the snakes, lizards
and amphibians found within this ecosystem.
Lizards have an amazing built in defense mechanism that allows them
to drop their tail if they are threatened by a predator. If a lizard drops its
tail it will grow back, but it requires a lot of energy to do so. The tail that
regenerates will not look the same, it will be reconstructed only as
cartlidge, the bone does not regenerate .
The origin of reptiles on our earth began aproximatly 300 million
years ago. Modern reptiles inhabit every continent and there are
8,000 species worldwide. The scientists that study reptiles and
amphibians are called herpetologists. Herpetologists work all
around the world.
Snakes eat a variety of small mammals, lizards, insects, bird eggs, and
kingsnakes will even eat rattlesnakes. Lizards also have a wide variety
of meal preferences they like to dine on insects, bird eggs, spiders, the
alligator lizard will even eat other lizards.
Lizards and snakes are some of natures most amazing creatures.
Snakes are mobile creatures that can travel far distances but they
do not have legs. Contracting and expanding of muscles allows
them to slither from place to place.
Wherever you fall in the spectrum from fear to fascination when you
encounter these creatures, learning about them and understanding
their relationship to the environment is an important step toward
appreciating these scaly living dinosaurs.
Western Fence Lizard
This is the most common of all lizards you will see at the
park. How many have you already seen today? They like to
hang out on rocks, fences and walls soaking up the sun
during the day. Reptiles are cold-blooded,or ectothermic
meaning they need the warmth of the sun to help them
regulate their body temperature. If you see one doing pushups or bobbing his head around he is not exercising he is
defending his territory or tyring to to attract a female lizard.
Sceloporus
occidentalis
5.7 – 8.9 cm
2.25 – 3.5 inches
The large head, long pointed snout, powerful
jaws and long bodies give this lizard its fierce
name. Their tail can grow twice the length of
their body if has never been dropped off. When
a lizard drops its tail to escape from a predator,
the tail will writh on the ground for a few
seconds to distract the predator just long
enough for the lizard to get away. This lizards
tail is prehensile, they use it for support to
hang on branches and manuver through brush.
Alligator Lizard
Elgaria multicarinata
7.3 – 17.8 cm
2.8 – 7 inches
The vibrant orange color on this lizard’s
throat and often on its chest, along with
its stunningly long tail and horizontal
stripes make this lizard a remarkable
beauty. When defending their territory the
male arches his back, twitches and whips
the tip of his tail and points his snout at
the ground. Once an abundant lizard,
their populations are now scattered
because much of the habitat they depend
on has been destroyed by development.
Belding’s OrangeThroated Whiptail
Cnemidophorus
hyperythrus
5.1 – 7 cm
2 – 2.75 inches
Western Side-Blotched
Lizard
Uta stansburiana
3.8 – 6.3 cm
1.5 – 2.5 inches
California Legless Lizard
Anniella pulchra
11 – 17.8 cm
4.3 – 7 inches
The abundance of this
lizard, like the fence lizard
makes it very likely you will
see it in the park.
In the animal kingdom competition for survival and
reproduction tends to be more fierce for males than
females. This is one of the reasons that males tend to be
more colorful and vibrant than their female counterparts.
Most lizards can see color and beautiful colors are more
attractive and desireable to a prospective mate. Case in
point made here for the male side-blotched lizard. Males
of this species have blue speckles on their upper
surface.This lizard has a relativly short-lived lifespan only
lasting about one year.
A lizard with no legs, WHAT? Well then it must be a snake. No no no,
actually this slithery reptile is indeed a lizard. This lizard looks like a
snake, and moves like a snake but it is classified by herpetologists as
a lizard because it has eyelids. What does a legless lizard say about
the evolution of snakes? It still has rudimentary legs, as do some
snakes.
These lizards do not lay eggs, they bear live young. Another
difference with the legless lizard to other legged lizards is that you will
not see them basking in direct sunlight. They live mostly underground
and will forage in loose soil, sand, or under leaf debris.
Photos courtesy of Cabrillo National Monument photo database, Emily Floyd, Jeff Nelson, Noel Adams, Chris Brown of USGS, Gary Nafis and californiaherps.com
Southern Pacific
Rattlesnak
Bird Checklist
This list is prepared using a novel approach for
describing the Seasonal Occurrence and Relative
Abundance of birds that are observed in and around
Cabrillo National Monument and Point Loma. Use
the symbols below to become better acquainted with
them and assist you in your birding efforts.
Cabrillo National Monument
AREA COVERED BY THIS LIST
The area covered by this list extends as far north as
Hill Street to the west of Catalina Boulevard (State
Highway 209) and Cañon Street to the east. Important
birding locations within this area include Sunset Cliffs
Park, Point Loma Nazarene College, nearby residential
areas, Shelter Island, Fort Rosecrans National
Cemetery, and Cabrillo National Monument. This
list contains 377 bird species, 41 of which have been
recorded nesting.
SEASONAL OR TEMPORAL STATUS
WHEN Are You Likely To Find Them?
Y = Year Round Resident
S = Summer Resident
W = Winter Resident
M = Seasonal Migrant
V = Irregular Visitor
# = Nests On Point Loma
RELATIVE ABUNDANCE
How likely are you to find them?
a = Abundant – Very easily encountered in suitable
habitat and season.
c = Common – Expected in suitable habitat and season.
u = Uncommon – Present but can be missed or
overlooked.
o = Occasional – Infrequently observed or encountered.
r = Rare – Unusual, out of range or habitat.
Contact others and call the San Diego Rare Bird Alert.
x = Accidental – Very unusual. Far out of range or habitat.
Contact others and call the San Diego Rare Bird Alert
(619-688-2473)
ADDITIONAL SPECIES
The following sixteen species have been observed
on Point Loma but their occurrence and status is
unconfirmed, unpublished, or incompletely known:
Buller’s Shearwater, Fork-tailed Storm-Petrel,
Blue-footed Booby, Purple Gallinule, Common
Black-headed Gull, Blue-and-yellow Macaw, Mitred
Parakeet, Blue-crowned Parakeet, Red-masked
Parakeet, Red-crowned Parrot, Cordilleran Flycatcher,
Brown-crested Flycatcher, Gray Vireo, Verdin, Gray
Silky-Flycatcher, and Pyrrhuloxia
SUPPORTERS
Cabrillo National Monument
The Cabrillo National Monument Foundation and the
National Park Service are dedicated to improving bird
habitats and revitalizing the health of the surrounding
plant community. This ongoing work is made
possible by community volunteers and the generous
contributions from the Cabrillo National Monument
Foundation. To find out how you can help, contact (619)
222-4747 or email CNMFKaren@aol.com. For more
information, please visit www.cnmf.org
ACKNOWLEDGEMENTS
Useful information and assistance was provided
by Philip Unitt of the San Diego Natural History
Museum, Department of Birds and Mammals.
Also, Richard Webster, and Don and Marjorie
Hasting reviewed the list and provided valuable
comments. Thank You.
Cabrillo National Monument
1800 Cabrillo Memorial Drive
San Diego, CA 92106
619.557.5450
www.facebook.com/cabrillonm
www.nps.gov/cabr
Published by Cabrillo National Monument Foundation
Cabrillo National Monument
Bird Checklist
Compiled By Volunteer-In-Park
Claude G. Edwards – July 2002.
According To The American Ornithologists’ Union,
7th Edition, 1999.
GAVIIDAE (Loons)
□ Red-throated Loon WMu
□ Pacific Loon WMc
□ Common Loon WMc
PODICEPEDIDAE (Grebes)
□ Pied-billed Grebe WMu
□ Horned Grebe WMu
□ Eared Grebe WMc
□ Western Grebe WMc
□ Clark’s Grebe WMu
PROCELLARIIDAE
(Shearwater)
□ Northern Fulmar WMo
□ Pink-footed Shearwater Mr
□ Sooty Shearwater Mr
□ Short-tailed Shearwater WMr
□ Black-vented Shearwater
WMu
HYDROBATIDAE
(Storm-Petrels)
□ Ashy Storm-Petrel Mr
□ Black Storm-Petrel Mr
□ Least Storm-Petrel Mr
SULIDAE (Boobies)
□ Brown Booby Vx
PELICANIDAE (Pelicans)
□ Am. White Pelican Vx
□ Brown Pelican Yc
PHALACROCARIDAE
(Cormorants)
□ Brandt’s Cormorant Yu
□ Double-cr. Cormorant Yc
□ Pelagic Cormorant Wu
FREGATIDAE
(Frigatebirds)
□ Magnificent Frigatebird Vr
ARDEIDAE
(Herons & Egrets)
□ Great Blue Heron Yc #
□ Great Egret Yu #
□ Snowy Egret Yc
□ Cattle Egret Vr
□ Green Heron Vr
□ Black-cr Night-Heron Yc #
THRESKIORNITHIDAE
(Storks & Ibises)
□ White-faced Ibis Vx
CATHARTIDAE
(New World Vultures)
□ Turkey Vulture Mr
ANATIDAE
(Geese & Ducks)
□ Gr. White-fr. Goose Mx
□ Snow Goose Mr
□ Canada Goose Mr
□ Brant Wu
□ Gadwall Mx
□ American Wigeon Mo
□ Mallard Mu
□ Blue-winged Teal Mx
□ Cinnamon Teal Mr
□ Northern Shoveler Mr
□ Northern Pintail Mr
□ Green-winged Teal Mr
□ Canvasback Mx
□ Redhead Mx
□ Greater Scaup WMr
□ Lesser Scaup WMc
□ Surf Scoter WMc
□ White-winged Scoter
WMo
□ Black Scoter WMr
□ Long-tailed Duck WMr
□ Bufflehead WMc
□ Common Goldeneye
WMr
□ Common Merganser
WMx
□ Red-breasted
Merganser WMu
□ Ruddy Duck WMo
ACCIPITRIDAE
(Hawks)
□ Osprey Yu
□ White-tailed Kite Mr
□ Mississippi Kite Mx
□ Bald Eagle Mr
□ Northern Harrier Mu
□ Sharp-shinned Hawk
WMc
□ Cooper’s Hawk Yc #
□ Red-shouldered Hawk
Yu #
□ Broad-winged Hawk Mx
□ Swainson’s Hawk Mx
□ Zone-tailed Hawk Mx
□ Red-tailed Hawk Yu #
□ Ferruginous Hawk Mx
□ Rough-legged Hawk Mx
□ Golden Eagle Mx
FALCONIDAE (Falcons)
□ American Kestrel Yu
□ Merli
National Park Service
U.S. Department of the Interior
Cabrillo National Monument
Shorebirds of Cabrillo National
Monument
NPS Photograph by Harry Engels
Cabrillo’s Shorebirds
As you explore the rocky intertidal zone, this brochure can
serve as a helpful guide to identifying the many species of
shorebirds that reside in and around the tide pools.
PELICANS (FAMILY: PELICANIDAE)
The most commonly seen pelican at Cabrillo’s tidepools is the
California Brown Pelican. The pelicans nest on the Los Coronados Islands
in Baja California, Mexico. These islands can be seen in the distance as you
gaze out into the ocean at the tidepools. California Brown Pelicans have
just recently been removed from the list of threatened and endangered
species. Groups of this remarkable bird most notably can be seen flying low
over the water’s surface in V-formations. (Below, Photograph by Will Elder,
NPS)
HERONS & EGRETS (FAMILY: ARDEIDAE)
Different types of Herons and Egrets also can be observed hunting in the shallow waters of the tidepools. They can be identified by their
long beaks, necks and legs. Cabrillo National Monument plays host to the
Snowy Egret, Great Egret, and Great Blue Heron. The Snowy Egret’s black
legs and yellow feet make it easy to identify (pictured below, left). The
Great Egret is a large all white bird, and it’s stature is usually a bit larger
than that of the Great Blue Heron. The Great Blue Heron (below, right) has
blue-grey plumage with an orange toned beak and legs. (Photographs by
Bill Ratcliff and Harry Engels, respectively. NPS)
GULLS (FAMILY: LARIDAE)
Gulls are a familiar bird species in San Diego, California and
many of them are year-round residents to the tidepools at Cabrillo. The
most commonly sighted gull is the Western Gull, which nests in the Point
Loma area. Immature Western Gulls have brown toned plumage. Mature
adults have white heads and bodies with gray wings. Other gulls that frequent the tidepools are Heermann’s Gull and the California Gull. Pictured
below is a mature Western Gull. (Photograph by Bryan Harry, NPS)
TERNS (FAMILY: STERNIDAE)
Terns were once considered a sub-family of the gull family,
Laridae. While they do bear a resemblance to gulls, they are considerably
smaller. Often times, Terns can be seen flying slowly over the water and
dipping down quickly to capture their prey—primarily fish. However, they
also feed on small crustaceans and insects. While enjoying your visit to the
tidepools, you are most likely to see a Royal Tern or a Forster’s Tern. Both
are year-round residents of the park. Photographed below are three Forster’s Terns. (Photograph by Will Elder, NPS)
OYSTERCATCHERS (FAMILY: HAEMATOPODIAE)
Cabrillo National Monument hosts a year-round stock of Black
Oystercatchers and a seasonal stock of American Oystercatchers. Black
Oystercatchers have entirely black bodies with long and vibrantly colored
bill and legs, while American Oystercatchers have black and brown bodies
with white on their wings and underbellies. This species never strays far
from the shore and can occasionally be spotted feeding on invertebrates
at Cabrillo National Monument. These birds are very skiddish, so consider
yourself very lucky if you do indeed see one!
EXPERIENCE YOUR AMERICA
Shorebirds of Cabrillo National Monument Pamphlet by Naomi McPherson
SANDPIPERS (FAMILY: SCOLOPACIDAE)
The Wandering Tattler, Spotted Sandpiper, Ruddy Turnstone,
Black Turnstone, Sanderling, Western Sandpiper, Marbled Godwit, Surfbird,
and Whimbrel are a few of the migratory Sandpipers that occasionally reside at Cabrillo National Monument during the winter months. These birds
can be seen frequenting the rocky shores and cliffs at the tidepools. Their
sizes vary from small to large. Basic plumage includes shades of brown
and gray with white speckled patterns on the body and wings, and white
underbellies. There are many types of birds within this family, but what distinguishes them from one another are their habits and behavioral patterns.
SPOTTED SANDPIPERS and WANDERING TATTLERS (both medium-sized shorebirds)
can be identified by the constant up and down bobbing of their tails (or “teetering” )
as they walk.
WESTERN SANDPIPERS are small birds with short necks and moderately large
beaks. They have black legs, and their backs are normally grayish brown with
hints of a reddish hue.
RUDDY TURNSTONES and BLACK TURNSTONES are stocky and somewhat small
shorebirds with short and slightly upturned beaks. Ruddy Turnstones have
bright orange legs, brown backs and black-and-white facial markings. Black
Turnstones have nearly all black bodies with white underbellies and black legs
and feet.
WHIMBRELS are medium-sized shorebirds that have noticably thin downturned
beaks with striped heads and grayish-brown speckled bodies.
MARBLED GODWITS are somewhat large shorebirds with long bills. Their
slightly upturned bills are pinkish at the base but otherwise black. Their bodies
are mostly brown with dark speckles on their back
Cabrillo
National Park Service
U.S. Department of the Interior
Cabrillo National Monument
1800 Cabrillo Memorial Drive
San Diego, CA 92106
Spring Wildflowers of Cabrillo
Cabrillo is home to an
array of colorful flowers.
Threatened flowers include
the Sea Dahlia and Coast
Desert Thorn. Please take
photos, not flowers.
Virgin’s Bower
Clematis pauciflora
Bayside Trail
California Everlasting
Gnaphalium californicum
Bayside Trail/Cabrillo Road
Wishbone Bush
Mariposa Lily
Calochortus weedii
Kelp Forest & Whale Overlook
Mirabilis californica
Tidepools/ Bayside Trail
Fishhook Cactus
Mammillaria dioica
Tidepools/ Bayside Trail
Popcorn Flower
Plagiobothrys collinus
Kelp Forest & Whale Overlook
Bayside Trail
Milk Maids
Cardamine californica
Bayside Trail
Blue Dicks
Blue-Eyed Grass
Sisyrinchium bellum
Kelp Forest & Whale Overlook
Coast Monkeyflower
Dichelostemma capitatum
Tidepools
Diplacus aurantiacus
(formerly Mimulus)
Bayside Trail
California Poppy
Indian Paintbrush
Coastal Deerweed
Castilleja affinis
Bayside Trail/Ocean View
Lotus scoparius
Tidepools/Bayside Trail
Eschscholzia californica
Tidepools
Tarweed
Deinandra fasciculate
Tidepools
Wild Cucumber
Marah macrocarpus
Widespread
Black Sage
Salvia mellifera
Widespread
Coast Desert-Thorn
Lycium californicum
Tidepools
Bladderpod
Locoweed
Isomeris arborea
Widespread
Astralagus trichopodus
Widespread
Sea Dahlia
Yellow Pincushion
Parish’s Nightshade
Solanum parishii
Tidepools/Bayside Trail
Coreopsis maritima
West of Lighthouse
Chaenactis glabriuscula
Path to Statue
Bajada Lupine
Lupinus concinnus
Tidepools
Bush Sunflower
Ground Pink
Encelia californica
Widespread
Nuttall’s Snapdragon
Antirrhinum nuttallianum
Linanthus dianthiflorus
Tidepools
San Diego Sunflower
Shaw’s Agave
Goldfields
Lasthenia californica
Tidepools
Agave shawii
Widespread (All Year)
Viguiera laciniata
Intertidal
Field Guide
C ABRILLO N ATION AL MONUMENT
C ABRILLO N ATION AL MONUMENT
Intertidal
Field Guide
About the
Ecosystem
Field
Guide
Our
Role
Cabrillo
Guide
1
C ABRILLO N ATION AL MONUMENT
About the Ecosystem
Welcome to one of the world’s rarest
ecosystems. This vast expanse, where land
meets sea, supports a thriving body of
marine organisms and plants all adapted to
live under the harsh environmental
pressures characteristic of this area.
Dictated by the gravitational pull of the
moon and sun, the tides predictably flow in
and out cyclically creating a low, high, and
middle tidal zone. Each of these zones
supports a distinctive community waiting
for you to explore. Use this guide to help
you in your adventure and discover the
organisms that call the intertidal home.
Intertidal Safety Tips
• Remember this area is federally protected;
taking of any kind is against the law.
• Only explore in designated areas.
• Be respectful of the critters that live here;
avoid disturbing their homes, and only
touch gently with two fingers.
• Waves and algae can make the area
extremely slippery. Wear sturdy shoes and
step with caution.
• Be aware of the incoming tide. Do not
turn your back to the waves and make
sure you can always reach dry land.
R E T U R N T O 2H O M E P A G E
C ABRILLO N ATION AL MONUMENT
Field Guide
WHAT ARE YOU LOOKING AT?
Invertebrates
Marine Plants
• Lack a spinal column
• May have exoskeleton
• Gain nutrients from the sun
• Provide food for ecosystem
Fish
Marine Mammals
• Aquatic vertebrates
• Use gills to breathe
• Breathe air and have hair
• Give birth to live young
3
FIELD GUIDE
Invertebrates
Invertebrates
without Exoskeleton
Invertebrates with
Exoskeleton
R E T U R N T O 4F I E L D G U I D E
F I EFL IDE LGDU G
I DUEI D E
F I E LF D
I DUEI D E
I E LGDU G
FIELD GUIDE
Invertebrates
without
Invertebrates
without
Black
Sea Hare E
Invertebrates
without
Invertebrates
without
Invertebrates
without
Exoskeleto
Invertebrates
without
Exoskeleton
Dorid
Hermissenda
Invertebrates without Exoskeleton
FIELD GUIDE
Aggregating Anemone
Exoskeleton
ates
without
Exoskeleton
Black
Sea
Hare
Sea Hare
Dorid
Black
Sea
Hare
atesNavanax
withoutBrown
Exoskeleton
Black
Sea
Hare
Black
Sea
Hare
Anemone
Solitary
Anemone
Brooding
Anemone
Black
Sea
Hare
Black
Sea
Hare Brooding
Aggregating Anemone
Aggregating
Anemone
Aggregating
Anemone
Aggregating
Anemone
Aggregating
Anemone
Aggregating
Anemone
Brown
Sea
Hare
Brooding
Anemone
Brooding
Anemone
Hopkins
Rose
Brown
Sea
Black
Sea
Hare
Brooding
Anemone
Brown
Sea
Hare
Brown
Sea Hare
BlackSea
Sea
Hare
Brown
Hare
Dorid
Spanish
Shawl
Brown Sea Hare
UIDE
5
Dorid
Dorid
Hermissenda
Navanax
Dorid
Dorid
Nudibranch
Dorid
Dorid
Hermissenda
RETURN TO INVERTEBRATES
Hermissenda
Nudibranch
Dorid
Hermissenda
Dorid
Hopkins
Rose
Hopkins
Rose
Hopkins
Rose
Nudibranch
Hopkins
Rose
Hermissenda
Hopkins
Two-Spot
Octopus
Hermissenda
Hopkins
Rose
Navanax
Hopkins
Rose
Navanax
Solitary Anemone
RETURN TO FIELD GUIDE
Two-Spot
Octopus
Solitary
Anemone
Navanax
Two-Spot
Octopus
Two-Spot
Solitary
Anemone
Navanax
Solitary
Anemone Two-Spot
Two-Spot
Octopus
SpanishOctopus
Shawl
Two-Spot Octopus
Spanish Shawl
RETURN TO FIELD GUIDE
Spanish Navanax
Shawl
Nudibranch
Navanax
Spanish
Shawl
Navanax
Solitary
Anemone
Navanax
RETURN
5
RETURN T
Spanish
Shawl
Spanish
Shawl
Spanish
Shawl
Spanish
Shawl
TO INVERTEBRATES
R E T U5R N T O F I E L D G U I D E
RETURN
5
R
E
T
U
R
N
T
O
L
D
G
U
I
D
E
R
E
T
U
R
F
I
E
L
D
G
U
I
D
E
R
NN
5
5
RETURN TO FIELD GUIDE
R E T U R N T O I N V E R T E B R A T E S RE ET TUUR R
5
RETURN TO FIELD GUIDE
RETURN T
INVERTEBRATES
Aggregating Anemone
Anthopleura elegantissima
Tidal Zone: High to Middle
Description: 5-7cm in diameter when open. Closes
during low tide and is covered with shells and sand.
Distribution: Alaska to Baja California
Interesting Facts: To reproduce, individual anemones
divide and separate into two new anemones of the same sex.
RETURN TO FIELD GUIDE
R E T U R N T O6 I N V E R T E B R A T E S W I T H O U T E X O S K E L E T O N
INVERTEBRATES
Solitary Anemone
Anthopleura sola
Tidal Zone: Low to Subtidal
Description: A 7-10 cm disc rimmed with tentacles;
usually light green with stripes extending from the center.
Distribution: Alaska to Panama
Interesting Facts: The stinging cells, or nematocysts, in
their tentacles are used to capture food.
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R E T U R N T O 7I N V E R T E B R A T E S W I T H O U T E X O S K E L E T O N
INVERTEBRATES
Brooding Anemone
Eplactis Prolifera
Tidal Zone: Low
Description: Orange, red, or brown 2 cm disc.
Distribution: Alaska to Southern California
Interesting Facts: Eggs are fertilized within the body of
the adult, then released out of its mouth.
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R E T U R N T O 8I N V E R T E B R A T E S W I T H O U T E X O S K E L E T O N
INVERTEBRATES
Black Sea Hare
Aplysia vaccaria
Tidal Zone: Low to Subtidal
Description: Dark purple to black sea slug that g
Native Bird
Field Guide
C ABRILLO N ATION AL MONUMENT
C ABRILLO N ATION AL MONUMENT
Bird Field Guide
About the
Ecosystem
Field
Guide
Our
Role
Cabrillo
Guide
1
C ABRILLO N ATION AL MONUMENT
About the Ecosystem
San Diego is the most biodiverse area
for birds in North America making
Cabrillo National Monument well-known
in the birding community as a premiere
bird watching spot. Over 200 bird species
have been spotted at Cabrillo National
Monument alone.
As a stop on the Pacific Flyway, migrant
species use the peninsula as a resting place.
Raptors use Point Loma as a landmark
during the peak of their migrations, and
some, like the Red-tailed Hawk, make their
home here year-round. The rocky
shoreline on Point Loma’s western side is
the only place in San Diego where Black
Oystercatchers are regulars.
However, these birds cannot sustain the
ecosystem alone. Each person can play a
role in helping our feathered friends. As
you learn more about birding, you will find
that your actions play a direct part in the
welfare of the birds that you see.
Remember that birds, while breeding
and raising their offspring, want to be left
alone. The more silent you are as you
move about, the more birds you will see.
Sometimes the best way to spot birds is to
just sit, wait, and listen. Give it a try.
R E T U R N T O 2H O M E P A G E
C ABRILLO N ATION AL MONUMENT
Field Guide
WHAT ARE YOU LOOKING AT?
Coastal Birds
Songbirds
• Birds that frequently visit the
shore (estuaries, bay, etc.)
• Birds with a musical song
• Often small and seen perching
Raptors
Corvids
• Predatory birds
• Large talons or claws
• Birds of the crow Family
• Includes ravens and jays
3
FIELD GUIDE
Coastal Birds
*Please refrain from playing calls in the wild as it can be stressful to wildlife.
It may be illegal in certain areas, always ask before use.
Black-bellied Plover
Black-necked Stilt
Black Oystercatcher
Brown Pelican
Caspian Tern
Double-crested Cormorant
Forster’s Tern
Great Blue Heron
Great Egret
Snowy Egret
Snowy Plover
Spotted Sandpiper
Western Gull
Whimbrel
Willet
R E T U R N T O 4F I E L D G U I D E
COAS TAL BIRDS
Black-bellied Plover
Pluvialis squatarola
Season Seen in San Diego: Winter
Description: Small, mostly black and white bird with
distinct black belly as adult; <1’ tall.
Distribution: Coastal North America
Interesting Facts: Often found foraging in the tidepools
for worms or crustaceans.
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5
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COAS TAL BIRDS
Black-necked Stilt
Himantopus mexicanus
Season Seen in San Diego: Year Round
Description: Long neck and legs with black wings; black
and white belly; <1.5’ tall.
Distribution: Coastal North America
Interesting Facts: Walks delicately on long red legs
along the shoreline.
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6
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COAS TAL BIRDS
Black Oystercatcher
Haematopus bachmani
Season Seen in San Diego: Winter
Description: Black with long, straight, reddish-orange
beak; found foraging on rocky shoreline; <2’ tall.
Distribution: West Coast of North America
Interesting Facts: Solely eats mollusks from rocks in the
intertidal. Sometimes this species hybridized with the
American Oystercatcher.
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7
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COAS TAL BIRDS
Brown Pelican
Pelecanus occidentalis
Season Seen in San Diego: Year Round
Description: Large, mostly brown with red and
yellow on neck in breeding season (December - August) as
an adult; mostly brown as juveniles; <5’ tall.
Distribution: Coastal North America
Interesting Facts: Dives into water to catch fish as
primary food source. This species came back from the
brink of extinction following the ban of DDT.
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8
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COAS TAL BIRDS
Caspian Tern
Hydroprogne caspia
Season Seen in San Diego: Year Round
Description: Large bird; white with black tips on
pointed wings; <2’ tall.
Distribution: Coastal North America
Interesting Facts: The largest of the tern species.
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9
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COAS TAL BIRDS
Double-crested Cormorant
Phalacrocorax auritus
Season Seen in San Diego:Year Round
Description: All black with orange-ish beak; two crests
on top of head in breeding season (March - May); <3’
tall.
Distribution: Oceans and bays within North America
Interesting Facts: Dives for fish as food source. Dries its
wings while on rocks.
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10
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COAS TAL BIRDS
Forster’s Tern
Sterna forsteri
Season Seen in San Diego: Year Round
Description: White, small bird with black cap in
summer; <1’ tall.
Distribution: Oceans and bays within North America
Interesting Facts: Dives into water to catch small fish as
food source.
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11
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COAS TAL BIRDS
Great Blue Heron
Ardea herodias
Season Seen in San Diego: Year Round
Description: Large, gray and blue with long neck; <4.5’
tall.
Distribution: Coastal North America
Interesting Facts: Very large and walks slowly when
hunting pr
Native Plant
Field Guide
C ABRILLO N ATION AL MONUMENT
C ABRILLO N ATION AL MONUMENT
Native Plant
Field Guide
About the
Ecosystem
Field
Guide
Our
Role
Cabrillo
Guide
1
C ABRILLO N ATION AL MONUMENT
About the Ecosystem
The Mediterranean Ecosystem is made
up of plants that have adapted to warm,
dry summers and cool winters with a few
storms lasting a few days at a time. To
survive through the dry season, some
plants found in these habitats have large
roots, or bodies, where they store water
to use when needed. Other plants have
leaf adaptations that prevent the loss of
water. These adaptations include leaves
that fall off during dry seasons, leaves with
a waxy coating that protects them from
evaporation, or leaves with hairs that
reflect light penetrating the plant.
Plant Communities
Coastal Sage Scrub
Chaparral
• Small Plants (less than 3 feet)
• Woody Shrubs (up to 8 feet)
• Spread out and dirt is often seen
• Plants often grow close together
• Typically direct sunlight all day
• Usually shaded for part of the day
R E T U R N T O 2H O M E P A G E
SHRUBS
Aromatic Plants
Black Sage
Bladderpod
Everlasting
Sagebrush
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3
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SHRUBS
Bicolor Everlasting
Pseudognaphalium bioletti
Flowering Season: January -May
Description: Clasping, distinctly two colored leaves with
white crowded flowers and sweet scent (lemon-like); <3’
Distribution: California and Baja California
Interesting Facts: This species of Pseudognaphalium may
feel slightly sticky to the touch.
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4
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SHRUBS
Black Sage
Salvia mellifera
Flowering Season: May - July
Description: Branched woody shrub <6’; small dark
green leaves with several whirls around the upright stalks,
flower color varies from white, pale blue, and lavender
Distribution: California and Northern Baja
Interesting Facts: The word ‘mellifera’ means foul odor.
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5
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SHRUBS
Bladderpod
Peritoma arborea
Flowering Season: All year with rain
Description: Spreading shrub <6’, 3 gray-green
leaflets, yellow tubular 4 petal flowers, bladder shaped
seed pods
Distribution: California and Northern Baja
Interesting Facts: Often, you will find the Harlequin
bug using this plant for survival. Some Harlequin bugs
can spend their whole life on a single Bladder Pod
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6
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SHRUBS
California Sagebrush
Artemisia califonica
Flowering Season: August - December
Description: Erect or spreading branches <4’, soft
green-gray linear leaves, small yellow-green flowers
Distribution: Central to Southern California and
Northern Baja
Interesting Facts: This plant is not a true sage, but
utilizes the same chemicals to smell like a sage.
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7
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SHRUBS
Common Wildflowers
Black Sage
Bladderpod
Bladder Pod
CA Buckwheat
Bushmallow
Bush Sunflower
Deer Weed
Goldenbush
SD Sunflower
Sea Dahlia
Tansy Mustard
White Fiesta Flower
Yellow Pincushion
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8
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SHRUBS
Black Sage
Salvia mellifera
Flowering Season: May - July
Description: Branched woody shrub <6’; small dark
green leaves with several whirls around the upright stalks,
flower color varies from white, pale blue, and lavender
Distribution: California and Northern Baja
Interesting Facts: The word ‘mellifera’ means foul odor.
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9
RETURN TO WILDFLOWERS
SHRUBS
Bladderpod
Peritoma arborea
Flowering Season: All year with rain
Description: Spreading shrub <6’, 3 gray-green leaflets,
yellow tubular 4 petal flowers, bladder shaped seed pods
Distribution: California and Northern Baja
Interesting Facts: Often, you will find the Harlequin
bug using this plant for survival. Some Harlequin bugs
can spend their whole life on a single Bladder Pod.
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10
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SHRUBS
California Flattop Buckwheat
Eriogonum fasciculatum
Flowering Season: All year with rain
Description: Woody brittle shrub <5’, small slender
bundled leaves, white pom-pom like flowers with pink
anthers, dry rust colored flower heads retained
Distribution: Western North America - California,
Utah, Arizona and Northern Baja
Interesting Facts: Some may say it has pink pollen, but
in fact the anthers of this plants are simply pink.
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11
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SHRUBS
Coastal Bushmallow
Malacothamnus fasciculatus
Flowering Season: April - July
Description: Shrub <6’, softly lobed felty leaves, pink
with orangish center flowers bundled along stalk
Distribution: Western North America - California and
Mexico
Interesting Facts: On the underside of its leaves, it has
star-like hairs (stellate trichomes), which help it capture
moisture on foggy days.
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12
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SHRUBS
Bush Sunflower
Encelia californica
Flowering Season: February - June
Description: Branched <4’, oval green smooth edged
leaves, yel
Native Herptiles
Field Guide
C ABRILLO N ATION AL MONUMENT
C ABRILLO N ATION AL MONUMENT
Native Herptiles
Field Guide
About the
Ecosystem
Field
Guide
Our
Role
Cabrillo
Guide
1
C ABRILLO N ATION AL MONUMENT
About the Ecosystem
Cabrillo National Monument is home
to 12 species of herptiles – six species of
snakes, five species of lizards, and one
amphibian, the Garden Slender
Salamander.
Long-term monitoring of these species
began in 1995 by Dr. Robert Fisher
(SDSU, then USGS), as part of a larger
scale study of herptile species in Southern
California. National Park Service took over
monitoring at Cabrillo in 2000 to continue
assessments of possible decline in species’
numbers. Because the Point Loma
peninsula is island-like (surrounded on
three sides by ocean, and cut off by
development to the north), and due to their
limited home ranges, these animals are
extremely susceptible to population decline
and extirpation (no longer existing in a
particular area where they historically were
found). Eight reptile species are thought to
have already been extirpated from the
peninsula: Coronado Island Skink, Red
Diamond Rattlesnake, Western Yellowbellied Racer, Coast Horned Lizard, Red
Coachwhip, Two-striped Gartersnake,
California Glossy Snake, and the Western
Long-nosed Snake.
R E T U R N T O 2H O M E P A G E
C ABRILLO N ATION AL MONUMENT
Field Guide
WHAT ARE YOU LOOKING AT?
Snakes
• Elongated, legless reptile
without eyelids
Lizards
• Reptile typically with long body,
detachable tail, four legs, and
moveable eyelids
Amphibian
• No lungs; breathe through
their skin
3
FIELD GUIDE
Reptiles - Snakes
California
Kingsnake
California
Striped Racer
San Diego
Gopher Snake
San Diego
Night Snake
San Diego
Ring-necked Snake
Southern Pacific
Rattlesnake
R E T U R N T O 4F I E L D G U I D E
SNAKES
California Kingsnake
Lampropeltis californiae
Active Period: Daytime in cooler weather, night, dusk
and dawn in hot weather
Description: 2.5 - 3.5' long with smooth, shiny scales;
alternating bands or lateral stripe of black or brown and
white or light yellow.
Distribution: Southwest North America
Interesting Facts: Preys upon rattlesnakes because it is
immune to rattlesnake venom.
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5
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SNAKES
California Striped Racer
Coluber lateralis lateralis
Active Period: Daytime
Description: A long, thin snake with smooth scales; body
is olive, gray, or black in color with two yellow or cream
stripes on either side of the body that extend to the tail.
Distribution: California and Baja California
Interesting Facts: Excellent eyesight; “periscopes” in
shrubs looking for prey, usually lizards. This species does not
constrict, but rather chomps down on prey whole.
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6
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SNAKES
San Diego Gopher Snake
Pituophis catenifer annectens
Active Period: Daytime and hot nights
Description: Large snake with tan or light yellow body
with brown or black blotches on back and sides; dark stripes
in front of eyes and behind each eye.
Distribution: California and Baja California
Interesting Facts: Often misidentified as a rattlesnake
because of their size and similar markings. When threatened
they will flatten their head and rattle their tails.
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7
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SNAKES
San Diego Night Snake
Hypsiglena ochrorhyncha klauberi
Active Period: Nighttime, dusk and dawn
Description: Small, slender snake with narrow flat head;
color matches environment - from light gray to cream with
gray or brown blotches on back and sides; slit pupils.
Distribution: California and Baja California
Interesting Facts: Rear-fanged and technically
venomous, but harmless to humans.
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8
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SNAKES
San Diego Ring-necked Snake
Diadophis punctatus similis
Active Period: Cloudy days, dusk, and at night
Description: Small, thin snake with smooth scales; body
is black - gray - olive in color with orange band that circles
the neck; underside of tail is bright red/orange.
Distribution: California and Baja California
Interesting Facts: When threatened, will flip and coil
body to show off bright coloration - a deterrent to predators.
Fanged and venomous, but harmless to humans.
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9
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SNAKES
Southern Pacific Rattlesnake
Crotalus oreganus helleri
Active Period: Nighttime when hot, daytime when warm
Description: Heavy-bodied pit viper with triangular head
and rattled tail; brown - olive brown body with dark blotches
outlined in white; dark barred tail.
Distribution: California and Baja California
Interesting Facts: Contrary to popular belief, baby
rattlesnakes are NOT more dangerous than adults! This
species gives live birth and hunts through heat sensing.
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FIELD GUIDE
Reptiles - Lizards
Orange-throated
Whiptail
Southern California
Legless Lizard
Great Basin Fence
Lizard
San Diego
Alligator Lizard
Western Sideblotched Lizard
R E T U R N T O
Terrestrial Mammals
Field Guide
C ABRILLO N ATION AL MONUMENT
C ABRILLO N ATION AL MONUMENT
Terrestrial Mammals
Our
Role
Cabrillo
Guide
1
C ABRILLO N ATION AL MONUMENT
About the Ecosystem
Situated on the tip of the Point Loma
Peninsula, Cabrillo National Monument
is surrounded on three sides by water and
the fourth by development. The park’s location creates an island-like habitat for
the organisms that reside here. Terrestrial
mammals have limited home ranges,
which make them extremely susceptible
to population decline and extirpation (no
longer existing in an area where they
were historically found).
Long-term monitoring programs of
the park’s resident mammal species have
been in place since the 1990s. Some small
mammals, such as mice and shrews, are
captured in pitfall buckets during herpetofauna (snake and lizard) monitoring. Others are monitored via motion-sensored
camera traps located throughout the
park.
Bats are monitored by a special device
that records the high-frequency echolocation sounds bats emit. Biologists can use
those recordings to determine what
species of bats are around. As of 2018,
there have been confirmed recordings of
11 different species at Cabrillo. The Point
Loma Peninsula provides an important
stop-over for migratory species, such as
the Hoary Bat and Big Free-Tailed Bat.
R E T U R N T O 2H O M E P A G E
C ABRILLO N ATION AL MONUMENT
Field Guide
WHAT ARE YOU LOOKING AT?
• Medium-sized mammals larger than
rodents but no larger than foxes
• Small, flying mammals that are almost
exclusively nocturnal
• Characterized by strong, constantlygrowing incisors and no canine teeth
• Small, nocturnal insectivore
3
FIELD GUIDE
Meso-Mammals
R E T U R N T O 4F I E L D G U I D E
MESO-MAMMALS
Brush Rabbit
Sylvilagus bachmani
Active Period: Twilight
Description: Small, uniform gray-brown rabbit; no
larger than approximately 1' when fully grown.
Distribution: Oregon to Baja California, Mexico
Interesting Fact: Foraging activity at night decreases
when moonlight is increased, and also less active on windy
or rainy nights, as this species relies on its hearing to listen
for predators.
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5
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MESO-MAMMALS
Desert Cottontail Rabbit
Sylvilagus audubonii
Active Period: Dawn & Dusk
Description: Light brown in color with distinct, white
"cotton" tail, orange nape, and dark rim on outer edge of
the ears; 1.2' long when fully grown.
Distribution: Montana to Central Mexico
Interesting Fact: The Cottontail uses its white cottonlike tail to distract predators as it runs away, flicking it to one
side or the other.
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MESO-MAMMALS
Feral Cat
Felis catus
Active Period: Primarily Nocturnal
Description: House cats introduced to natural areas by
humans who have released them there.
Distribution: Every continent except Antarctica
Interesting Fact: Feral cats cause negative impacts on
the environment by preying on native birds, lizards, and
small mammals.
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7
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MESO-MAMMALS
Gray Fox
Urocyon cinereoargenteus
Active Period: Primarily Nocturnal
Description: Medium-sized canids with a mix of red,
white, black, and gray fur; 3.5’ long and 6-11 pounds fully
grown.
Distribution: Southern Canada to northern South
America
Interesting Fact: This is the only canid species in North
America able to climb trees.
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8
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MESO-MAMMALS
Raccoon
Procyon lotor
Active Period: Nocturnal
Description: Color can range from black to tan, with a
distinct mask across the eyes and a bushy tail with 4-10 rings;
stocky in build and generally weighs 13-15 pounds.
Distribution: Southern Canada to northern South
America
Interesting Fact: Raccoons are well-adapted to live in
proximity to humans and often make dens under structures.
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9
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MESO-MAMMALS
Striped Skunk
Mephitis mephitis
Active Period: Primarily Nocturnal
Description: Overall black with a thin, white stripe
along their head and a V-shaped white marking along their
back; about the size of a house cat.
Distribution: Southern Canada to northern Mexico
Interesting Fact: When threatened, this skunk will discharge an overpowering fluid spray which can reach up to
18 feet, causing nausea, pain, and even blindness.
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10
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MESO-MAMMALS
Virginia Opossum
Didelphis virginiana
Active Period: Nocturnal
Description: Gray fur and a white head with a long,
furless tail they use as an additional limb; 13-21" long fully
grown.
Distribution: Throughout North and Central America
Interesting Fact: Opossums will play dead when
threatened by predators, a behavior that can last up to 6
hours. This species is not native to California.
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FIELD GUIDE
Bats
• Tail is fully connected to the membrane
• Insectivorous
• Tail projects beyond the membrane
connecting it to th
CNM Geology Guide
How Point Loma Was Formed & Geologic Features
Step 1~76 Million Years Ago
An underwater current
created fan-shaped
deposits of sand, mud, and
gravel on the ocean floor.
For millions of years these
deposits, called alluvial
fans, compacted and
layered one on top of
another. These layers are
the ground you are walking
on today!
Step 2~2 Million Years Ago
The Earth’s crust is made of
plates fractured with fault
lines. These faults move
(plate tectonics) and
cause geologic events such
as earthquakes. Plates
sometimes bunch up
against each other which
can create new formations.
Bunching in this region of
San Diego forced the
bottom of the ocean
upwards and above the
surface, exposing the
sediment from the alluvial
fan. This movement created
the Point Loma Peninsula.
Step 3–Current Day
Forces are still at work on
the peninsula! Waves carve
the sandstone shore and
erode the cliffs, and water
moves sand toward the
beach. Wind forms dunes
and beach ridges on the
top of sea cliffs. Plate
tectonics are still forcing the
peninsula to rise about 5
inches every 1,000 years!
Lindavista
Fm.
Point
Loma
Fm.
Cabrillo
Fm.
Bay
Point
Fm.
The Point Loma peninsula consists of four major
formations that were created in different ways. The
Point Loma and Cabrillo formations represent
layers from different parts of the alluvial fan. The
Bay Point Fm. and the Linda Vista Fm. however,
are the products of continuous plate tectonic
movement and erosion caused by waves.
Alluvial Fan Deposits
Sandstone
Alluvial fans are blankets of gravity-deposited
sediment under the ocean. If we drained the ocean,
the alluvial fan that created the Point Loma Peninsula
might look something like this.
Sandstone is made of layers of sediment deposited
by alluvial fans and compressed over time to make
stone. Because it’s made of sand it erodes (breaks
away) easily – be careful climbing around the cliffs!
Fissure (Cracks)
Marker/Bolt
Cracks such as these were created when the
peninsula was uplifted and tilted by plate tectonics.
These metal bolts are used in biological surveys. The
bolts enable scientists to return to the same location
year after year for long-term monitoring programs.
Inoceramid
Concretion
Concretions are geologic features that are created
much like a pearl: they start with seed material, such
as a shell, then layers of calcium carbonate build
around it, continuing to layer and harden over time.
This true fossil is that of a large, thin bivalve (2-shelled
animal) called an Inoceramid. These relatives of
modern-day clams went extinct near the end of the
Cretaceous period, around 65 million years ago.
Trace Fossils
Trace fossils are fossilized tunnels that were made by animals as they searched for food in the sand.
The left trace fossil was created by a relative of modern-day sea urchins, the right two trace fossils were created
by relatives of modern-day shrimp.