This is a massasauga rattlesnake (Sistrurus catenatus catenatus). Massasauga, is an Ojibwe (Native AmericanTribe) word meaning big river-mouth, which probably referred to the area where the rattlesnake was found. They are also known as; massasauga, massasauga rattler, black massasauga, black rattler, black snapper, gray rattlesnake, little grey rattlesnake, muck rattler, prairie rattlesnake, spotted rattler, swamp rattler, víbora de cascabel (Mexico), dwarf prairie rattlesnake, eastern massasauga great adder, ground rattlesnake, Kirtland's rattlesnake, little black rattlesnake, Michigan point rattler, prairie massasauga, rattlesnake, small prairie rattlesnake, snapper, swamp massasauga, swamp rattlesnake, and triple-spotted rattlesnake.
This is a Timber Rattler (Crotalus horridus). They’re also known as; American Viper; Banded Rattlesnake; Velvettail Rattler; Canebrake Rattlesnake; Eastern Rattlesnake; Black Rattlesnake; Canebrake Rattler; Seminole Rattlesnake; Timber Rattlesnake; Pit Viper; Common Rattlesnake.