Classification
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Crotalus - Rattlesnakes
- Crotalus adamanteus - Eastern Diamond-backed Rattlesnake
- Crotalus angelensis - Angel Island Rattlesnake
- Crotalus aquilus - Queretaran Dusky Rattlesnake
- Crotalus atrox - Western Diamond-backed Rattlesnake
- Crotalus basiliscus - Mexican West Coast Rattlesnake
- Crotalus caliginis - Coronado Island Rattlesnake
- Crotalus catalinensis - Santa Catalina Island Rattlesnake
- Crotalus cerastes - Sidewinder
- Crotalus cerberus - Arizona Black Rattlesnake
- Crotalus enyo - Baja California Rattlesnake
- Crotalus ericsmithi - Guerreran Long-Tailed Rattlesnake
- Crotalus estebanensis - Isla San Esteban Black-tailed Rattlesnake
- Crotalus horridus - Timber Rattlesnake
- Crotalus intermedius - Mexican Small-headed Rattlesnake
- Crotalus lannomi - Autlan Rattlesnake
- Crotalus lepidus - Rock Rattlesnake
- Crotalus lorenzoensis - San Lorenzo Island Diamond Rattlesnake
- Crotalus mitchellii - Speckled Rattlesnake
- Crotalus molossus - Black-tailed Rattlesnake
- Crotalus muertensis - El Muerto Island Rattlesnake
- Crotalus oreganus - Western Rattlesnake
- Crotalus polystictus - Mexican Lancehead Rattlesnake
- Crotalus pricei - Twin-spotted Rattlesnake
- Crotalus pusillus - Tancitaran Dusky Rattlesnake
- Crotalus ravus - Mexican Pygmy Rattlesnake
- Crotalus ruber - Red Diamond Rattlesnake
- Crotalus scutulatus - Mohave Rattlesnake
- Crotalus simus - Middle American Rattlesnake
- Crotalus stejnegeri - Long-tailed Rattlesnake
- Crotalus stephensi - Panamint Rattlesnake
- Crotalus tancitaiensis - Tancítaro Rattlesnake
- Crotalus tigris - Tiger Rattlesnake
- Crotalus tortugensis - Tortuga Island Diamond-backed Rattlesnake
- Crotalus totonacus - Tontonacan Rattlesnake
- Crotalus transversus - Cross-banded Mountain Rattlesnake
- Crotalus triseriatus - Mexican Dusky Rattlesnake
- Crotalus viridis - Prairie Rattlesnake
- Crotalus willardi - Ridge-nosed Rattlesnake
