massasauga

A small, variably colored rattlesnake (Sistrurus catenatus) of North America, often found in moist areas.

One of the small but very venomous rattlesnakes which inhabit prairies in the western United States and Territories, such as Crotalophorus tergeminus (Sistrurus catenatus).

The black rattlesnake (Crotalus tergemina, or Caudisona tergemina), found in the Mississippi Valley.

The rattlesnake Crotalus catenatus or Sistrurus catenatus in the family Viperidae. It is found in three subspecies.

pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice and small amphibians

small pygmy rattlesnake