== == {| ! ! Family ! Species ! Common Name | Crotaphytidae Crotaphytus collaris Collared lizard Crotaphytidae Gambelia wislizenii Longnose leopard lizard Phrynosomatidae Holbrookia maculata Lesser earless lizard Phrynosomatidae Phrynosoma cornutum Texas horned lizard Phrynosomatidae Phrynosoma hernandesi Short-horned lizard Phrynosomatidae Phrynosoma modestum Round-tail horned lizard Phrynosomatidae Sceloporus graciosus Sagebrush lizard Phrynosomatidae Sceloporus magister Desert spiny lizard Phrynosomatidae Sceloporus undulatus Prairie lizard / Plateau lizard Phrynosomatidae Urosaurus ornatus Tree lizard Phrynosomatidae Uta stansburiana Side-bloched lizard Scincidae Eumeces gaigeae Variable skink Scincidae Eumeces multivirgatus Many-lined skink Scincidae Eumeces obsoletus Great Plains skink Teiidae Cnemidophorus neotesselatus* Triploid Colorado checkered whiptail Teiidae Cnemidophorus sexlineatus Six-lined racerunner Teiidae Cnemidophorus tesselatus Diploid Colorado checkered whiptail Teiidae Cnemidophorus tigris Western whiptail Teiidae Cnemidophorus velox* Plateau striped whiptail ! Family ! Species ! Common Name | Colubridae Arizona elegans Glossy snake Colubridae Coluber constrictor Racer Colubridae Diadophis punctatus Ringneck snake Colubridae Elaphe guttata Corn snake Colubridae Heterodon nasicus Western hognose snake Colubridae Heterodon platirhinos Eastern hognose snake Colubridae Hypsiglena torquata Night snake Colubridae Lampropeltis getula Common kingsnake Colubridae Lampropeltis triangulum Milk snake Colubridae Opheodrys vernalis Smooth green snake Colubridae Masticophis flagellum Coachwhip Colubridae Masticophis taeniatusStriped whipsnake Colubridae Nerodia sipedon Northern water snake Colubridae Pituophis catenifer Bullsnake or Gopher snake Colubridae Rhinocheilus lecontei Longnose snake Colubridae Sonora semiannulata 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 Redstripe 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 oreganus concolor Midget Faded rattlesnake Viperidae Crotalus viridis Western Rattlesnake Viperidae Sistrurus catenatus Massasauga ! Family ! Species ! Common Name | Chelydridae Chelydra serpentina Snapping turtle Kinosternidae Kinosternon flavescens Yellow mud turtle Emydidae Chrysemys picta Painted turtle Emydidae Terrapene ornata Ornate Box turtle Trionychidae Apalone spinifera Spiny softshell ! ! ! ! ! ! ! ! |}