It has developed resistance to the venom of the western diamondback rattlesnake. Maximum reported lengths for the eastern diamondback rattlesnake are and . The noise belongs to Rattlesnake Jake, the Western diamondback rattlesnake from the first movie. Junior wakes up and finds himself face-to-face with a western diamondback rattlesnake. This enzyme is present in the venom of the eastern diamondback rattlesnake ("Crotalus adamanteus"). One popular myth is that the eastern diamondback rattlesnake must rattle before striking. Most fatal bites are attributed to the eastern diamondback rattlesnake and the western diamondback rattlesnake. Snakes, like the diamondback rattlesnake in the story, are prevalent in the area. Striped whipsnake ("Masticophis taeniatus"), and Western diamondback rattlesnake ("Crotalus atrox").