The eastern diamondback rattlesnake, or Crotalus adamanteus, is found in nearly every region of Florida, including Northeast Florida. This venomous snake lives in pine forests and wetland areas, but usually not swamps or marshes. Some eastern diamondback rattlesnakes grow up to 8 feet in length. The snake's rattle, located on its tail, serves as a defense mechanism against predators.
Also known as Sistrurus miliarius barbouri, the venomous dusky pigmy rattlesnake is one of the smallest rattlesnake species; adults only grow between 20 and 30 inches. These snakes are also "pit vipers" due to the pit between their eyes and nostril. Also, dusky pigmy rattlesnakes do not shake their rattle when they are in defense mode.