Illinois
Snakes in Jefferson County
10 species have been documented here, and none are venomous.
Every snake recorded in Jefferson County
Common Watersnake
Nerodia sipedon
Harmless
North American Racer
Coluber constrictor
Harmless
Prairie Kingsnake
Lampropeltis calligaster
Harmless
Common Garter Snake
Thamnophis sirtalis
Harmless
Gray Ratsnake
Pantherophis spiloides
Harmless
Plain-bellied Watersnake
Nerodia erythrogaster
Harmless
Eastern Milksnake
Lampropeltis triangulum
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Rough Greensnake
Opheodrys aestivus
Harmless
Black Kingsnake
Lampropeltis nigra
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.