Crotalus adamanteus atrox (a taxonomic synonym) 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 diamond rattlesnake, a venomous pitviper species found in southwestern California in the United States and Baja California in Mexico