The timber rattlesnake, scientifically known as Crotalus horridus, is a rattlesnake which inhabits the eastern region of the United States. It is one of the most venomous snake in North America, but it is not aggressive. The timber rattlesnake has long fangs through which it injects neurotoxic and cytotoxic venom that causes generalized muscle contraction, bleeding, and tissue destruction. It has a body length average of 1.30 m; it is brownish grey with keeled orange dorsal scales that run the length of its back and black crossbands. The Crotalus horridus feeds on rats and mice.