by Alex Gugel , all rights reserved
Reptiles and Amphibians
Brochure of Reptiles and Amphibians at Zion National Park (NP) in Utah. Published by the National Park Service (NPS).
National Park Service U.S. Department of the Interior Zion Zion National Park Reptiles and Amphibians Terrestrial Gartersnake and Canyon Treefrog Key to this guide Measurements: Measurements are from snout to vent for amphibians and lizards (tail length not included). † Threatened or endangered species. Western Chuckwalla Amphibians Tiger Salamander - Ambystoma tigrinum: 3-6.5” large stocky salamander. Yellow to dark olive spots/ blotches with irregular edges on dark ground color. Great Basin Spadefoot - Spea intermontanus: 1.5-2.5” hourglass marking of gray or olive on back set oﬀ by ash-gray streaks. Pupils are vertical. Spade on hind foot wedge-shaped. Arizona Toad - Bufo microscaphus: 2-3.25” green-gray, brown colored with light V-shaped stripe across head. Warts red to brown (also called Southwestern Toad). Red-spotted Toad - Bufo punctatus: 1.5-3” small toad with ﬂattened head and pointed snout; Light gray to reddish brown with red/orange warts. Woodhouse’s Toad - Bufo woodhousii: 1.25-5” gray, brown, or olive above with whitish dorsal stripe down middle of back; warts light. Unconﬁrmed native - Please report sightings; photos helpful. Canyon Treefrog - Hyla arenicolor: 1.25-2.25”; brown, gray, or olive frog, normally without eyestripe; very faint pattern of dark patches on back. Suction discs on toes. Northern Leopard Frog - Rana pipiens: 2-4.4”; greenish/brown frog with well deﬁned rounded pale bordered, dark spots; white stripe on upper jaw. Canyon Treefrog Lizards Collared Lizard Snakes Great Basin Gopher Snake Tortoise Western Banded Gecko - Coleonyx variegatus: 2-3”; fragile appearance, large eyes with vertical pupils, cream colored with dark crossbands. Common Chuckwalla - Sauromalus ater: 5.5-8”; large, ﬂat, dark bodied. Loose folds of skin on neck and sides; may have dark or light cross bands on body; blunt tail with broad base. Great Basin Collared Lizard - Crotaphytus bicinctores: 3-4.25”; tail up to twice the length of the body; two black bands on shoulder and neck; overall color is olive-brown to green. Long-nosed Leopard Lizard - Gambelia wislizenii: 3.25-5.75”; gray-brown color with dusky brown spots; whitish lines across back and tail. Gravid (pregnant) females have bright orange spots. Zebra-tailed Lizard - Callisaurus draconoides: 2.5-4”; ear openings present. Underside of tail with black bars. Belly markings at midpoint of body. Desert Spiny Lizard - Sceloporus magister: 3.255.5”; stout, strong looking lizard; gray to brown mottled with yellow, green, brown, and metallic blue; black shoulder markings. Plateau Lizard - Sceloporus tristichus: 1.6-3.25”; Plain gray to brown with yellow to green blotches; may be some blue on throat. One of the most frequently seen lizards in Zion. (Note: taxonomy is unstable; sometimes listed as a subspecies of Sceloporus elongatus.) Common Sagebrush Lizard - Sceloporus graciosus: 1.8-2.6”; very similar to plateau lizard but slightly smaller and darker. Side-blotched Lizard - Uta stansburiana: 1.5-2.3”; overall gray to brown color with black “armpit.” In spring, males with variable ﬂecking on sides and back. Ornate Tree Lizard - Urosaurus ornatus: 1.52.25”; gray to brown overall with strip of enlarged scales down center of back. Desert Horned Lizard - Phrynosoma platyrhinos: 2.5-3.75”; similar to short-horned but has long head spines and is found at low elevations. Greater Short-horned Lizard - Phrynosoma hernandesi: 1.75-4.25”; broad, ﬂat body; short tail; short horns or spine on back of head; irregular dark and light markings; high elevation. Western Skink - Eumeces skiltonianus: 2.1-3.75”; body long and rounded; shiny appearance; body cream to light brown with dark stripe down each side and lighter stripe down back; tail bright blue in young, fading with age. Plateau Spotted Whiptail - Cnemidophorus innotatus: 2.5-3.5”; slender body; tail about twice the length of the body; well deﬁned dark and light stripes down back. Western Whiptail - Cnemidophorus tigris: 2.254.5”; very long and streamlined; generally gray to brown with mottled black or brown blotches on back and sides; adults with orange tent on lower back and base of tail; tail about twice the length of the body. Gila Monster - Heloderma suspectum: 9-14”; swollen, dorsal bead-like tail. Gaudy pattern of pink, black, orange, and yellow. Ring-necked Snake - Diadophis punctatus: 8-30”; olive above; yellow-orange below; no ring around neck. Coachwhip - Masticophis flagellum: 36-72”; slender; pinkish (may be tan/light brown) with faint crossbands down back, those on neck much darker. Striped Whipsnake - Masticophis taeniatus: 36-72”; slender; black to brown back with four narrow stripes running length of body. Western Patch-nosed Snake - Salvadora hexalepis: 20-46”; light tan/ground colored with wide brown-black stripe running length of each side. Gophersnake - Pituophis catenifer: 36-72”; yellow-gray to red-brown; dark brown-black blotches down back; dark line from eye to eye. Common Kingsnake - Lampropeltis getula: 30-60”; black and white bands circle entire length of snake. Sonoran Mountain Kingsnake - Lampropeltis pyromelana: 18-41”; black, cream, and coral-pink bands down length of body; thin band of blackcream-black separates each pink band. Terrestrial Gartersnake - Thamnophis elegans: 18-30”; gray-green overall with light yellow lines along top and each side. Groundsnake - Sonora semiannulata: 8-18”; red and black bands on back fade into yellow sides. Smith’s Black-headed Snake - Tantilla hobartsmithi: 5.5-15”; plain brown or beige above with dark brown or black head. Unconﬁrmed resident; report sightings, photos helpful. Western Lyresnake - Trimorphodon biscutatus: 18-47.75”; gray with brown blotches edged in black on upperparts; lyre-shaped pattern on top of head. Nightsnake - Hypsiglena torquata: 12-26”; gray to tan with brown spots on back and dark blotch on each side of neck. Western Rattlesnake - Crotalus oreganus: 15-65”; generally gray to brown with dark hexagonal patches down back; wide, ﬂat head and rattle on tail. † Desert Tortoise - Gopherus agassizii: 8-15”; high domed shell with prominent growth lines on shields; elephant-like limbs. Desert Tortoise EXPERIENCE YOUR AMERICA™ printed on recycled paper with soyink 4/09