Illinois
Snakes in Hamilton County
4 species have been documented here, and none are venomous.
Every snake recorded in Hamilton County
Common Garter Snake
Thamnophis sirtalis
Harmless
Gray Ratsnake
Pantherophis spiloides
Harmless
Common Watersnake
Nerodia sipedon
Harmless
Rough Greensnake
Opheodrys aestivus
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.