List of reptiles of Colorado

Last updated October 31, 2025

This is a list of individual, wild species of lizards, snakes, and turtles currently extant in the U.S. State of Colorado

Lizards

Family	Species	Common name
Crotaphytidae	Crotaphytus collaris	Common collared lizard
Crotaphytidae	Gambelia wislizenii	Long-nosed leopard lizard
Phrynosomatidae	Holbrookia maculata	Lesser earless lizard
Phrynosomatidae	Phrynosoma cornutum	Texas horned lizard
Phrynosomatidae	Phrynosoma hernandesi	Greater short-horned lizard
Phrynosomatidae	Phrynosoma modestum	Roundtail horned lizard
Phrynosomatidae	Sceloporus graciosus	Sagebrush lizard
Phrynosomatidae	Sceloporus magister	Desert spiny lizard
Phrynosomatidae	Sceloporus undulatus	Eastern fence lizard
Phrynosomatidae	Urosaurus ornatus	Ornate tree lizard
Phrynosomatidae	Uta stansburiana	Common side-blotched lizard
Scincidae	Plestiodon obsoletus	Great Plains skink
Scincidae	Plestiodon multivirgatus epipleurotus ^§	Variable skink
Scincidae	Plestiodon multivirgatus multivirgatus ^§	Many-lined skink
Teiidae	Aspidoscelis neotesselatus *	Colorado checkered whiptail
Teiidae	Aspidoscelis sexlineata	Six-lined racerunner
Teiidae	Aspidoscelis tesselata	Common checkered whiptail
Teiidae	Aspidoscelis tigris	Western whiptail
Teiidae	Aspidoscelis velox *	Plateau striped whiptail

^§Article exists for this species, but not the subspecies.

*Article exists for this genus, but not the individual species.

Snakes

Family	Species	Common name
Colubridae	Pantherophis emoryi	Great Plains rat snake
Colubridae	Arizona elegans	Glossy snake
Colubridae	Coluber constrictor mormon ^§	Western yellow-bellied racer
Colubridae	Diadophis punctatus	Ring-necked snake
Colubridae	Heterodon nasicus	Western hognose snake
Colubridae	Hypsiglena chlorophaea	Desert night snake
Colubridae	Hypsiglena jani	Chihuahuan night snake
Colubridae	Lampropeltis holbrooki	Speckled kingsnake
Colubridae	Lampropeltis californiae	California kingsnake
Colubridae	Lampropeltis gentilis	Western milk snake
Colubridae	Opheodrys vernalis	Smooth green snake
Colubridae	Masticophis flagellum	Coachwhip
Colubridae	Masticophis taeniatus	Striped whipsnake
Colubridae	Nerodia sipedon	Northern water snake
Colubridae	Pituophis catenifer deserticola	Great Basin gopher snake
Colubridae	Pituophis catenifer sayi	Bullsnake
Colubridae	Rhinocheilus lecontei	Long-nosed snake
Colubridae	Sonora semiannulata	Western ground snake
Colubridae	Tantilla hobartsmithi	Southwestern blackhead snake
Colubridae	Tantilla nigriceps	Plains blackhead snake
Colubridae	Thamnophis cyrtopsis	Blackneck garter snake
Colubridae	Thamnophis elegans	Western terrestrial garter snake
Colubridae	Thamnophis proximus	Western ribbon snake
Colubridae	Thamnophis radix	Plains garter snake
Colubridae	Thamnophis sirtalis	Common garter snake
Colubridae	Tropidoclonion lineatum	Lined snake
Leptotyphlopidae	Leptotyphlops dulcis	Texas blind snake
Viperidae	Crotalus concolor	Midget faded rattlesnake
Viperidae	Crotalus viridis	Prairie rattlesnake
Viperidae	Sistrurus tergeminus	Western massasauga

^§Article exists for this species, but not the subspecies.

Turtles

Family^[1]	Species	Common name
Chelydridae	Chelydra serpentina	Common snapping turtle
Emydidae	Chrysemys picta bellii	Painted turtle
Emydidae	Terrapene ornata	Ornate box turtle
Emydidae	Trachemys scripta elegans	Red-eared slider^†
Kinosternidae	Kinosternon flavescens	Yellow mud turtle
Trionychidae	Apalone spinifera	Spiny softshell turtle

^†Red-eared sliders are an introduced and invasive species to Colorado.

Notes

References

↑ Rhodin, Anders G.J.; van Dijk, Peter Paul; Inverson, John B.; Shaffer, H. Bradley; Roger, Bour (December 31, 2011). "Turtles of the world, 2011 update: Annotated checklist of taxonomy, synonymy, distribution and conservation status" (PDF). Chelonian Research Monographs. 5. Archived from the original (PDF) on January 31, 2012.

External links

38°59′50″N105°32′52″W / 38.9972°N 105.5478°W / 38.9972; -105.5478 (State of Colorado)

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[Rhodin11-1] Rhodin, Anders G.J.; van Dijk, Peter Paul; Inverson, John B.; Shaffer, H. Bradley; Roger, Bour (December 31, 2011). "Turtles of the world, 2011 update: Annotated checklist of taxonomy, synonymy, distribution and conservation status" (PDF). Chelonian Research Monographs. 5. Archived from the original (PDF) on January 31, 2012.

[1]

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