Key Points The Eastern diamondback rattlesnake is a deadly pit viper belonging to the family Viperidae. Compared to other large rattlesnakes, this one takes the lead in terms of size. This particular species, which is located solely in the southern United States, is the largest venomous rattlesnake in the world! Adults are approximately four to … Continue reading Discover the Largest Eastern Diamondback Rattlesnake Ever Recorded!