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Western Terrestrial Garter Snake
Thamnophis elegans
5,744 observations
Gopher Snake
Pituophis catenifer
5,141 observations
Prairie Lizard
Sceloporus consobrinus
3,379 observations
Prairie Rattlesnake
Crotalus viridis
2,916 observations
Plateau Fence Lizard
Sceloporus tristichus
1,655 observations
Plains Garter Snake
Thamnophis radix
1,605 observations
North American Racer
Coluber constrictor
1,295 observations
Eastern Collared Lizard
Crotaphytus collaris
1,260 observations
Painted Turtle
Chrysemys picta
1,193 observations
Pond Slider
Trachemys scripta
1,111 observations
Greater Short-horned Lizard
Phrynosoma hernandesi
1,102 observations
Six-lined Racerunner
Aspidoscelis sexlineatus
937 observations
Common Snapping Turtle
Chelydra serpentina
918 observations
Common Side-blotched Lizard
Uta stansburiana
850 observations
Common Sagebrush Lizard
Sceloporus graciosus
632 observations
Colorado Checkered Whiptail
Aspidoscelis neotesselatus
575 observations
Ornate Box Turtle
Terrapene ornata
506 observations
Western Earless Lizard
Holbrookia maculata
502 observations
Plateau Striped Whiptail
Aspidoscelis velox
499 observations
Coachwhip
Masticophis flagellum
485 observations
Lined Snake
Tropidoclonion lineatum
461 observations
Western Whiptail
Aspidoscelis tigris
400 observations
Texas Horned Lizard
Phrynosoma cornutum
395 observations
Western Milksnake
Lampropeltis gentilis
342 observations
Smooth Greensnake
Opheodrys vernalis
319 observations
Glossy Snake
Arizona elegans
303 observations
Common Garter Snake
Thamnophis sirtalis
299 observations
Plains Hognose Snake
Heterodon nasicus
299 observations
Common Watersnake
Nerodia sipedon
297 observations
Plains Black-headed Snake
Tantilla nigriceps
274 observations
Ornate Tree Lizard
Urosaurus ornatus
201 observations
Spiny Softshell
Apalone spinifera
177 observations
Great Plains Ratsnake
Pantherophis emoryi
169 observations
Great Plains Ground Snake
Sonora episcopa
164 observations
Common Checkered Whiptail
Aspidoscelis tesselatus
117 observations
Many-lined Skink
Plestiodon multivirgatus
105 observations
Ring-necked Snake
Diadophis punctatus
104 observations
Long-nosed Snake
Rhinocheilus lecontei
96 observations
Striped Whipsnake
Masticophis taeniatus
89 observations
Chihuahuan Nightsnake
Hypsiglena jani
87 observations
Long-nosed Leopard Lizard
Gambelia wislizenii
74 observations
Great Plains Skink
Plestiodon obsoletus
64 observations
Western Massasauga
Sistrurus tergeminus
64 observations
Western Rattlesnake
Crotalus oreganus
53 observations
Black-necked Garter Snake
Thamnophis cyrtopsis
51 observations
Speckled Kingsnake
Lampropeltis holbrooki
25 observations
Desert Spiny Lizard
Sceloporus magister
25 observations
Brown Anole
Anolis sagrei
12 observations
Yellow Mud Turtle
Kinosternon flavescens
10 observations
Invasive
Chihuahuan Spotted Whiptail
Aspidoscelis exsanguis
9 observations
Frequently Asked Questions
- The 10 most common reptiles in Colorado are:
- Western Terrestrial Garter Snake (Thamnophis elegans)
- Gopher Snake (Pituophis catenifer)
- Prairie Lizard (Sceloporus consobrinus)
- Prairie Rattlesnake (Crotalus viridis)
- Plateau Fence Lizard (Sceloporus tristichus)
- Plains Garter Snake (Thamnophis radix)
- North American Racer (Coluber constrictor)
- Eastern Collared Lizard (Crotaphytus collaris)
- Painted Turtle (Chrysemys picta)
- Pond Slider (Trachemys scripta)
- The most observed reptile in Colorado is Western Terrestrial Garter Snake (Thamnophis elegans), with 5,744 recorded observations.
- Some of the most commonly observed invasive reptiles in Colorado include:
- Chihuahuan Spotted Whiptail (Aspidoscelis exsanguis)