One of the new rattlers from my upcoming "Snakes v3" The Eastern Diamondback is found in the Southeastern United States from southeastern North Carolina, south along the coastal plain through peninsular Florida to the Florida Keys, and west along the Gulf Coast through southern Alabama and Mississippi to southeastern Louisiana. It is the largest rattlesnake by length and one of the heaviest snakes in the world. One specimen, collected in 1946, measured 7.8 feet (240 cm) in length and weighed 34 pounds (15.4 kg). It forages actively or lies in ambush for small mammals, especially rabbits and rice rats. The diet also includes birds. The eastern diamondback rattlesnake has the reputation of being the most dangerous venomous snake in North America. While not usually aggressive, it is large and powerful. The eastern diamondback rattlesnake is a major leader of fatal snakebites within its geographical range. Studies show a mortality rate of 10–20% (untreated). Its venom is estimated to contain over 100 different toxins.