Missouri
Venomous:
Southern Copperhead (Agkistrodon contortrix contortrix ) -Venomous
Western Cottonmouth (Agkistrodon piscivorous leucostoma) -Venomous
Northern Cottonmouth (Agkistrodon piscivorous piscivorous ) -Venomous
Timber Rattlesnake (Crotalus horridus atricaudatus) -Venomous
Eastern Massasauga (Sistrurus catenatus) -Venomous
Western Pygmy Rattlesnake (Sistrurus miliarius streckeri) -Venomous