Crotalus
Crotalus adamanteus – Eastern diamondback rattlesnake
Crotalus aquilus – Querιtaro dusky rattlesnake
Crotalus atrox – Western diamondback rattlesnake
Crotalus basiliscus – Mexican westcoast rattlesnake
Crotalus catalinensis – Santa Catalina rattlesnake
Crotalus cerastes cerastes – Mojave desert sidewinder
Crotalus cerastes cercobombus – Sonoran desert sidewinder
Crotalus cerastes laterorepens – Colorado desert sidewinder
Crotalus cerberus – Arizona black rattlesnake
Crotalus durissus durissus – Neotropical rattlesnake
Crotalus durissus cascavella – Northeastern Brazilian rattlesnake
Crotalus durissus collilineatus – Central Brazilian rattlesnake
Crotalus durissus cumanensis – Venezuelan rattlesnake
Crotalus durissus marajoensis – Northeastern Brazilian rattlesnake
Crotalus durissus maricelae – Maricela rattlesnake
Crotalus durissus ruruima – Mount Roraima rattlesnake
Crotalus durissus terrificus – South american rattlesnake
Crotalus durissus trigonicus – Rupunini rattlesnake
Crotalus durissus unicolor – Aruba island rattlesnake
Crotalus durissus vegrandis – Uracoan rattlesnake
Crotalus enyo enyo – Baja California rattlesnake
Crotalus enyo furvus – Rosario rattlesnake
Crotalus enyo cerralvensis – Ceralvo island rattlesnake
Crotalus ericsmithi – Guerrero longtailed rattlesnake
Crotalus horridus – Timber rattlesnake
Crotalus intermedius intermedius – Totalcan smallheaded rattlesnake
Crotalus intermedius gloydi – Oaxacan smallheaded rattlesnake
Crotalus intermedius omiltemanus – Omilteman smallheaded rattlesnake
Crotalus lannomi – Autlan rattlesnake
Crotalus lepidus lepidus – Mottled rock rattlesnake
Crotalus lepidus klauberi – Banded rock rattlesnake
Crotalus lepidus maculosus – Durango rock rattlesnake
Crotalus lepidus morulus – Tamaulipan rock rattlesnake
Crotalus mitchelli mitchelli – San lucan speckled rattlesnake
Crotalus mitchelli angelensis – Angel de la guarda island speckled rattlesnake
Crotalus mitchelli muertenis – El Muerto island rattlesnake
Crotalus mitchelli pyrrhus – southwestern speckled rattlesnake
Crotalus molossus molossus – Northern blacktailed rattlesnake
Crotalus molossus estebanensis – San Esteban island blacktailed rattlesnake
Crotalus molossus nigrescens – Mexican blacktailed rattlesnake
Crotalus molossus oaxacus – Oaxacan blacktailed rattlesnake
Crotalus oreganus oreganus – Northern Pacific rattlesnake
Crotalus oreganus abyssus – Grand Canyon rattlesnake
Crotalus oreganus caliginis – Coronado island rattlesnake
Crotalus oreganus concolor – Midget faded rattlesnake
Crotalus oreganus helleri – Southern pacific rattlesnake
Crotalus oreganus lutosus – Great basin rattlesnake
Crotalus polystictus – Mexican lanceheaded rattlesnake
Crotalus pricei pricei – Western twinspotted rattlesnake
Crotalus pricei miquihuanus – Eastern twinspotted rattlesnake
Crotalus pusillus – Tancitaran dusky rattlesnake
Crotalus ravus ravus – Central plateau pygmy rattlesnake
Crotalus ravus brunneus – Oaxacan pygmy rattlesnake
Crotalus ravus exiguus – Guerreran pygmy rattlesnake
Crotalus ruber ruber – Red diamond rattlesnake
Crotalus ruber exsul – Cedros island diamond rattlesnake
Crotalus ruber lorenzoensis – San Lorenzo Island diamond rattlesnake
Crotalus ruber lucasensis – San Lucan diamond rattlesnake
Crotalus scutulatus scutulatus – Northern Mojave rattlesnake
Crotalus scutulatus salvini – Huamantlan rattlesnake
Crotalus simus simus – Central American rattlesnake
Crotalus simus culminatus – Northwestern neotropical rattlesnake
Crotalus simus tzabcan – Yucatan Neotropical rattlesnake
Crotalus stejnegeri – Longtailed rattlesnake
Crotalus stephensi – Panamint rattlesnake
Crotalus tancitarensis – Tancitaran rattlesnake
Crotalus tigris – Tiger rattlesnake
Crotalus tortugensis – Tortuga island diamond rattlesnake
Crotalus totonacus – Totonacan rattlesnake
Crotalus transversus – Crossbanded mountain rattlesnake
Crotalus triseriatus armstrongi – Mexican dusky rattlesnake
Crotalus triseriatus triseriatus – Central plateau dusky rattlesnake
Crotalus viridis viridis – Prairie rattlesnake
Crotalus viridis nuntius - Hopi rattlesnake
Crotalus willardi willardi – Arizona ridgenosed rattlesnake
Crotalus willardi amabilis – Del nido ridgenosed rattlesnake
Crotalus willardi meridionalis – Southern ridgenosed rattlesnake
Crotalus willardi obscurus – New mexican ridgenosed rattlesnake
Crotalus willardi silus – Western chihuahuan ridgenosed rattlesnake


Sistrurus
Sistrurus catenatus catenatus – Eastern massasauga
Sistrurus catenatus edwardsi – Desert massasauga
Sistrurus catenatus tergeminus – Western massasauga
Sistrurus miliarius miliarius – Carolina pygmy rattlesnake
Sistrurus miliarius barbouri – Dusky pigmy rattlesnake
Sistrurus miliarius streckeri – Western pygmy rattlesnake