Illinois
Venomous:
Southern Copperhead (Agkistrodon contortrix contortrix ) -Venomous
Western Cottonmouth (Agkistrodon piscivorous leucostoma) -Venomous
Timber Rattlesnake (Crotalus horridus atricaudatus) -Venomous
Eastern Massasauga (Sistrurus catenatus) -Venomous