Rattlesnakes (Crotalus)
Lower Classification
- Eastern diamondback rattlesnake (Crotalus adamanteus)
- Angel de la Guarda Island speckled rattlesnake (Crotalus angelensis)
- Querétaro dusky rattlesnake (Crotalus aquilus)
- Western dusky rattlesnake (Crotalus armstrongi)
- Western diamondback rattlesnake (Crotalus atrox)
- Mexican west coast rattlesnake (Crotalus basiliscus)
- Campbell’s rattlesnake (Crotalus campbelli)
- Santa Catalina rattlesnake (Crotalus catalinensis)
- Sidewinder,Horned rattlesnake (Crotalus cerastes)
- Arizona black rattlesnake (Crotalus cerberus)
- Midget faded rattlesnake (Crotalus concolor)
- Northwestern neotropical rattlesnake (Crotalus culminatus)
- South American rattlesnake (Crotalus durissus)
- Tehuantepec Isthmus Neotropical rattlesnake (Crotalus ehecatl)
- Baja California rattlesnake (Crotalus enyo)
- Guerreran long-tailed rattlesnake (Crotalus ericsmithi)
- San Esteban Island rattlesnake (Crotalus estebanensis)
- Southern Pacific rattlesnake (Crotalus helleri)
- Timber rattlesnake (Crotalus horridus)
- Mexican small-headed rattlesnake (Crotalus intermedius)
- Autlán rattlesnake (Crotalus lannomi)
- Rock rattlesnake (Crotalus lepidus)
- San Lorenzo Island red diamond rattlesnake (Crotalus lorenzoensis)
- Great Basin rattlesnake (Crotalus lutosus)
- Veracruz Neotropical rattlesnake (Crotalus mictlantecuhtli)
- Speckled rattlesnake (Crotalus mitchellii)
- Black-tailed rattlesnake (Crotalus molossus)
- Tamaulipan rock rattlesnake (Crotalus morulus)
- Western rattlesnake (Crotalus oreganus)
- Eastern black-tailed rattlesnake (Crotalus ornatus)
- Horsehead Island speckled rattlesnake (Crotalus polisi)
- Mexican lance-headed rattlesnake (Crotalus polystictus)
- Twin-spotted rattlesnake (Crotalus pricei)
- Tancitaran dusky rattlesnake (Crotalus pusillus)
- Southwestern speckled rattlesnake (Crotalus pyrrhus)
- Mexican pygmy rattlesnake (Crotalus ravus)
- Red diamond rattlesnake (Crotalus ruber)
- Mojave rattlesnake (Crotalus scutulatus)
- Middle American rattlesnake (Crotalus simus)
- Long-tailed rattlesnake (Crotalus stejnegeri)
- Panamint rattlesnake (Crotalus stephensi)
- Tancitaro rattlesnake (Crotalus tancitarensis)
- Louse Island speckled rattlesnake (Crotalus thalassoporus)
- Tiger rattlesnake (Crotalus tigris)
- Crotalus tlaloci
- Totonacan rattlesnake (Crotalus totonacus)
- Cross-banded mountain rattlesnake (Crotalus transversus)
- Mexican dusky rattlesnake (Crotalus triseriatus)
- Yucatán neotropical rattlesnake (Crotalus tzabcan)
- Aruba rattlesnake (Crotalus unicolor)
- Uracoan rattlesnake (Crotalus vegrandis)
- Prairie rattlesnake (Crotalus viridis)
- Ridge-nosed rattlesnake (Crotalus willardi)