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Colubridae (colubrid snakes)
Thamnophis sirtalis sirtalis
Thamnophis sirtalis parietalis
Thamnophis radix
Nerodia sipedon sipedon
Heterodon nasicus nasicus
Heterodon platyrhinos
Elaphe vulpina vulpina
Elaphe obsoleta obsoleta
Pituophis melanoleucus
Lampropeltis getulus holbrooki
Lampropeltis calligaster calligaster
Lampropeltis triangulum triangulum
Lampropeltis triangulum syspila
Coluber constrictor flaviventris
Coluber constrictor foxii
Storeria dekayi texana
Storeria dekayi wrightorum
Storeria occipitomaculata
Opheodrys vernalis
Diadophus punctatus

Viperidae (vipers)
Agkistrodon contortrix
Crotalus horridus
Sistrurus catenatus