Illinois Herp Atlas
Snakes
Coachwhip
Masticophis flagellum
Common Gartersnake
Thamnophis sirtalis
Common Kingsnake
Lampropeltis getula
Copperhead
Agkistrodon contortrix
Cottonmouth
Agkistrodon piscivorus
Dekay's Brownsnake
Storeria dekayi
Diamondback Watersnake
Nerodia rhombifer
Eastern Hog-nosed Snake
Heterodon platirhinos
Eastern Racer
Coluber constrictor
Eastern Ribbonsnake
Thamnophis sauritus
Eastern Smooth Earthsnake
Virginia valeriae
Eastern Wormsnake
Carphophis amoenus
Flat-headed Snake
Tantilla gracilis
Gophersnake
Pituophis catenifer
Graham's Crayfish Snake
Regina grahamii
Gray Ratsnake
Elaphe spiloides
Great Plains Ratsnake
Pantheropis emoryi
Kirtland's Snake
Clonophis kirtlandii
Lined Snake
Tropidoclonion lineatum
Massasauga
Sistrurus catenatus
Milk Snake
Lampropeltis triangulum
Mississippi Green Watersnake
Nerodia cyclopion
Mudsnake
Farancia abacura
Northern Watersnake
Nerodia sipedon
Plain-bellied Watersnake
Nerodia erythrogaster
Plains Gartersnake
Thamnophis radix
Prairie Kingsnake
Lampropeltis calligaster
Queen Snake
Regina septemvittata
Red-bellied Snake
Storeria occipitomaculata
Ring-necked Snake
Diadophis punctatus
Rough Greensnake
Opheodrys aestivus
Scarletsnake
Cemophora coccinea
Smooth Greensnake
Opheodrys vernalis
Southern Watersnake
Nerodia fasciata
Timber Rattlesnake
Crotalus horridus
Western Foxsnake
Elaphe vulpina
Western Hog-nosed Snake
Heterodon nasicus
Western Ribbonsnake
Thamnophis proximus