Western Massasauga
Sistrurus catenatus

Size:  1 1/2 - 2 1/2 ft
Distribution
Western 1/2 to northeastern part of the state.  The closest relative of the pigmy rattlesnake, the western massasauga, or swamp rattler, has variable habitat preferences near a permanent water source.  Although not extremely toxic, bites can be painful and relatively serious.