- ground rattler, massasauga, Sistrurus miliaris - small pygmy rattlesnake
--1 is a kind of rattlesnake, rattler
- massasauga, massasauga rattler, Sistrurus catenatus - pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice and small amphibians
--2 is a kind of rattlesnake, rattler
--2 is a member of Sistrurus, genus Sistrurus