Common rattlesnake may refer to: Crotalus adamanteus, or eastern diamondback rattlesnake, a venomous pit viper species found in the southeastern United States Crotalus horridus, or timber rattlesnake, a venomous pit viper species found in the eastern United States Crotalus viridis, or prairie rattlesnake, a venomous pit viper species native to the western United States, southwestern Canada, and northern Mexico