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Western Terrestrial Garter Snake
Thamnophis elegans
6,229 observations
Gopher Snake
Pituophis catenifer
5,767 observations
Prairie Lizard
Sceloporus consobrinus
3,757 observations
Prairie Rattlesnake
Crotalus viridis
3,265 observations
Plains Garter Snake
Thamnophis radix
1,794 observations
Plateau Fence Lizard
Sceloporus tristichus
1,788 observations
North American Racer
Coluber constrictor
1,452 observations
Eastern Collared Lizard
Crotaphytus collaris
1,396 observations
Painted Turtle
Chrysemys picta
1,376 observations
Pond Slider
Trachemys scripta
1,236 observations
Greater Short-horned Lizard
Phrynosoma hernandesi
1,197 observations
Six-lined Racerunner
Aspidoscelis sexlineatus
1,087 observations
Common Snapping Turtle
Chelydra serpentina
1,062 observations
Common Side-blotched Lizard
Uta stansburiana
914 observations
Common Sagebrush Lizard
Sceloporus graciosus
697 observations
Colorado Checkered Whiptail
Aspidoscelis neotesselatus
638 observations
Western Earless Lizard
Holbrookia maculata
567 observations
Plateau Striped Whiptail
Aspidoscelis velox
553 observations
Ornate Box Turtle
Terrapene ornata
542 observations
Common Coachwhip
Masticophis flagellum
542 observations
Lined Snake
Tropidoclonion lineatum
522 observations
Texas Horned Lizard
Phrynosoma cornutum
457 observations
Western Whiptail
Aspidoscelis tigris
450 observations
Western Milksnake
Lampropeltis gentilis
374 observations
Smooth Greensnake
Opheodrys vernalis
345 observations
Common Watersnake
Nerodia sipedon
339 observations
Glossy Snake
Arizona elegans
328 observations
Common Garter Snake
Thamnophis sirtalis
328 observations
Plains Hognose Snake
Heterodon nasicus
325 observations
Plains Black-headed Snake
Tantilla nigriceps
320 observations
Ornate Tree Lizard
Urosaurus ornatus
214 observations
Spiny Softshell
Apalone spinifera
206 observations
Great Plains Ratsnake
Pantherophis emoryi
191 observations
Great Plains Ground Snake
Sonora episcopa
174 observations
Common Checkered Whiptail
Aspidoscelis tesselatus
128 observations
Long-nosed Snake
Rhinocheilus lecontei
111 observations
Many-lined Skink
Plestiodon multivirgatus
109 observations
Ring-necked Snake
Diadophis punctatus
108 observations
Striped Whipsnake
Masticophis taeniatus
97 observations
Chihuahuan Nightsnake
Hypsiglena jani
93 observations
Long-nosed Leopard Lizard
Gambelia wislizenii
91 observations
Great Plains Skink
Plestiodon obsoletus
69 observations
Western Massasauga
Sistrurus tergeminus
69 observations
Western Rattlesnake
Crotalus oreganus
54 observations
Black-necked Garter Snake
Thamnophis cyrtopsis
53 observations
Desert Spiny Lizard
Sceloporus magister
28 observations
Speckled Kingsnake
Lampropeltis holbrooki
26 observations
Brown Anole
Anolis sagrei
14 observations
Yellow Mud Turtle
Kinosternon flavescens
12 observations
Invasive
Chihuahuan Spotted Whiptail
Aspidoscelis exsanguis
11 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)
- Plains Garter Snake (Thamnophis radix)
- Plateau Fence Lizard (Sceloporus tristichus)
- 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 6,229 recorded observations.
- Some of the most commonly observed invasive reptiles in Colorado include:
- Chihuahuan Spotted Whiptail (Aspidoscelis exsanguis)
- Some of the most commonly observed native reptiles in Colorado include:
- Western Terrestrial Garter Snake (Thamnophis elegans)
- Gopher Snake (Pituophis catenifer)
- Prairie Lizard (Sceloporus consobrinus)
- Prairie Rattlesnake (Crotalus viridis)
- Plateau Fence Lizard (Sceloporus tristichus)