Western diamond rattlesnake

Western diamond rattlesnake may refer to:


 * Crotalus atrox, a.k.a. the western diamondback rattlesnake, a venomous pitviper species found in the United States and Mexico
 * Crotalus ruber, a.k.a. the red rattlesnake, a venomous pitviper species found in southwestern California in the United States and Baja California in Mexico