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Western Terrestrial Garter Snake
Thamnophis elegans
6,031 observations
Gopher Snake
Pituophis catenifer
5,558 observations
Prairie Lizard
Sceloporus consobrinus
3,639 observations
Prairie Rattlesnake
Crotalus viridis
3,092 observations
Plateau Fence Lizard
Sceloporus tristichus
1,751 observations
Plains Garter Snake
Thamnophis radix
1,723 observations
North American Racer
Coluber constrictor
1,415 observations
Eastern Collared Lizard
Crotaphytus collaris
1,358 observations
Painted Turtle
Chrysemys picta
1,340 observations
Pond Slider
Trachemys scripta
1,215 observations
Greater Short-horned Lizard
Phrynosoma hernandesi
1,167 observations
Six-lined Racerunner
Aspidoscelis sexlineatus
1,036 observations
Common Snapping Turtle
Chelydra serpentina
1,028 observations
Common Side-blotched Lizard
Uta stansburiana
904 observations
Common Sagebrush Lizard
Sceloporus graciosus
677 observations
Colorado Checkered Whiptail
Aspidoscelis neotesselatus
614 observations
Western Earless Lizard
Holbrookia maculata
545 observations
Plateau Striped Whiptail
Aspidoscelis velox
536 observations
Ornate Box Turtle
Terrapene ornata
522 observations
Common Coachwhip
Masticophis flagellum
518 observations
Lined Snake
Tropidoclonion lineatum
486 observations
Western Whiptail
Aspidoscelis tigris
440 observations
Texas Horned Lizard
Phrynosoma cornutum
405 observations
Western Milksnake
Lampropeltis gentilis
364 observations
Smooth Greensnake
Opheodrys vernalis
336 observations
Common Watersnake
Nerodia sipedon
322 observations
Common Garter Snake
Thamnophis sirtalis
320 observations
Plains Hognose Snake
Heterodon nasicus
314 observations
Glossy Snake
Arizona elegans
309 observations
Plains Black-headed Snake
Tantilla nigriceps
285 observations
Ornate Tree Lizard
Urosaurus ornatus
211 observations
Spiny Softshell
Apalone spinifera
201 observations
Great Plains Ratsnake
Pantherophis emoryi
176 observations
Great Plains Ground Snake
Sonora episcopa
166 observations
Common Checkered Whiptail
Aspidoscelis tesselatus
120 observations
Many-lined Skink
Plestiodon multivirgatus
108 observations
Ring-necked Snake
Diadophis punctatus
107 observations
Long-nosed Snake
Rhinocheilus lecontei
97 observations
Striped Whipsnake
Masticophis taeniatus
94 observations
Long-nosed Leopard Lizard
Gambelia wislizenii
87 observations
Chihuahuan Nightsnake
Hypsiglena jani
87 observations
Great Plains Skink
Plestiodon obsoletus
66 observations
Western Massasauga
Sistrurus tergeminus
66 observations
Western Rattlesnake
Crotalus oreganus
54 observations
Black-necked Garter Snake
Thamnophis cyrtopsis
51 observations
Speckled Kingsnake
Lampropeltis holbrooki
26 observations
Desert Spiny Lizard
Sceloporus magister
26 observations
Brown Anole
Anolis sagrei
14 observations
Yellow Mud Turtle
Kinosternon flavescens
10 observations
Invasive
Chihuahuan Spotted Whiptail
Aspidoscelis exsanguis
10 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 6,031 recorded observations.
- Some of the most commonly observed invasive reptiles in Colorado include:
- Chihuahuan Spotted Whiptail (Aspidoscelis exsanguis)