Illinois
Snakes in Cass County
9 species have been documented here, and none are venomous.
Every snake recorded in Cass County
Common Garter Snake
Thamnophis sirtalis
Harmless
Gopher Snake
Pituophis catenifer
Harmless
North American Racer
Coluber constrictor
Harmless
Diamondback Watersnake
Nerodia rhombifer
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Gray Ratsnake
Pantherophis spiloides
Harmless
Western Ribbon Snake
Thamnophis proximus
Harmless
Eastern Hognose Snake
Heterodon platirhinos
Harmless
Eastern Foxsnake
Pantherophis vulpinus
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.