Bastard rattlesnake

Bastard rattlesnake may refer to:


 * Crotalus horridus, a.k.a. the timber rattlesnake, a venomous pitviper species found in the eastern United States
 * Sistrurus miliarius, a.k.a. the pygmy rattlesnake, a venomous pitviper species found in the southeastern United States
 * Heterodon platirhinos, a.k.a. the eastern hog-nosed snake, a harmless colubrid species found in North America