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Western Terrestrial Garter Snake
Thamnophis elegans
6,551 observations
Gopher Snake
Pituophis catenifer
5,949 observations
Prairie Lizard
Sceloporus consobrinus
4,052 observations
Prairie Rattlesnake
Crotalus viridis
3,436 observations
Plateau Fence Lizard
Sceloporus tristichus
1,920 observations
Plains Garter Snake
Thamnophis radix
1,872 observations
North American Racer
Coluber constrictor
1,515 observations
Eastern Collared Lizard
Crotaphytus collaris
1,449 observations
Painted Turtle
Chrysemys picta
1,425 observations
Greater Short-horned Lizard
Phrynosoma hernandesi
1,257 observations
Pond Slider
Trachemys scripta
1,257 observations
Six-lined Racerunner
Aspidoscelis sexlineatus
1,151 observations
Common Snapping Turtle
Chelydra serpentina
1,092 observations
Common Side-blotched Lizard
Uta stansburiana
946 observations
Common Sagebrush Lizard
Sceloporus graciosus
720 observations
Colorado Checkered Whiptail
Aspidoscelis neotesselatus
710 observations
Plateau Striped Whiptail
Aspidoscelis velox
600 observations
Western Earless Lizard
Holbrookia maculata
591 observations
Common Coachwhip
Masticophis flagellum
563 observations
Ornate Box Turtle
Terrapene ornata
562 observations
Lined Snake
Tropidoclonion lineatum
534 observations
Texas Horned Lizard
Phrynosoma cornutum
488 observations
Western Whiptail
Aspidoscelis tigris
460 observations
Western Milksnake
Lampropeltis gentilis
387 observations
Common Watersnake
Nerodia sipedon
361 observations
Smooth Greensnake
Opheodrys vernalis
361 observations
Common Garter Snake
Thamnophis sirtalis
339 observations
Glossy Snake
Arizona elegans
338 observations
Plains Hognose Snake
Heterodon nasicus
329 observations
Plains Black-headed Snake
Tantilla nigriceps
323 observations
Spiny Softshell
Apalone spinifera
221 observations
Ornate Tree Lizard
Urosaurus ornatus
218 observations
Great Plains Ratsnake
Pantherophis emoryi
195 observations
Great Plains Ground Snake
Sonora episcopa
183 observations
Common Checkered Whiptail
Aspidoscelis tesselatus
139 observations
Ring-necked Snake
Diadophis punctatus
115 observations
Long-nosed Snake
Rhinocheilus lecontei
113 observations
Many-lined Skink
Plestiodon multivirgatus
112 observations
Striped Whipsnake
Masticophis taeniatus
106 observations
Chihuahuan Nightsnake
Hypsiglena jani
97 observations
Long-nosed Leopard Lizard
Gambelia wislizenii
93 observations
Great Plains Skink
Plestiodon obsoletus
74 observations
Western Massasauga
Sistrurus tergeminus
71 observations
Western Rattlesnake
Crotalus oreganus
59 observations
Black-necked Garter Snake
Thamnophis cyrtopsis
53 observations
Desert Spiny Lizard
Sceloporus magister
29 observations
Speckled Kingsnake
Lampropeltis holbrooki
26 observations
Brown Anole
Anolis sagrei
14 observations
Yellow Mud Turtle
Kinosternon flavescens
13 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)
- Plateau Fence Lizard (Sceloporus tristichus)
- Plains Garter Snake (Thamnophis radix)
- North American Racer (Coluber constrictor)
- Eastern Collared Lizard (Crotaphytus collaris)
- Painted Turtle (Chrysemys picta)
- Greater Short-horned Lizard (Phrynosoma hernandesi)
- The most observed reptile in Colorado is Western Terrestrial Garter Snake (Thamnophis elegans), with 6,551 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)