Snake Species: Crotalus spp. (without Crotalus durissus sspp.), Rattlesnakes
Distribution of Terrestrial Snakes in North America
Crotalus adamanteus
| Arkansas, Louisiana | SE | Louisiana only |
| Florida | X | |
| North & South Carolina, Georgia, Alabama, Mississippi | E+S |
Crotalus atrox
| Arizona | X | |
| Arkansas, Louisiana | X | Arkansas only |
| California, Nevada | SE | |
| Nebraska, Kansas, Oklahoma | X | Oklahoma only |
| New Mexico | X | |
| Texas | X |
Crotalus cerastes
| Arizona | W+SW | |
| California, Nevada | C+SE | |
| Utah, Colorado | SW | Utah only |
Crotalus cerberus
| Arizona | C+E | |
| New Mexico | W? |
Crotalus concolor
| Utah, Colorado | X | Eastern Utah, Western Colorado |
| Washington, Oregon, Idaho, Montana, Wyoming, North & South Dakota | S | South Western Wyoming only |
Crotalus helleri
| California, Nevada | SW | South Western California |
Crotalus horridus
Crotalus lepidus
| Arizona | SE | |
| New Mexico | S | |
| Texas | W |
Crotalus lutosus
| Arizona | NW | |
| California, Nevada | X | only NW California, all over Nevada |
| Utah, Colorado | W | Western Utah |
| Washington, Oregon, Idaho, Montana, Wyoming, North & South Dakota | X | Western Oregon, Central and Southern Idaho |
Crotalus mitchelli
| Arizona | W | |
| California, Nevada | C+SE |
Crotalus molossus
| Arizona | X | |
| New Mexico | X | |
| Texas | C+SW |
Crotalus oreganus
| British Columbia. Alberta, Saskatchewan | SW | Southern British Columbia |
| California, Nevada | X | |
| Washington, Oregon, Idaho, Montana, Wyoming, North & South Dakota | X |
Crotalus ornatus
| Texas | X |
Crotalus pricei
| Arizona | SE |
Crotalus ruber
| California, Nevada | SW | California only |
Crotalus scutulatus
| Arizona | X | |
| California, Nevada | C+E | |
| New Mexico | S | |
| Texas | SW | |
| Utah, Colorado | SW | Utah only |
Crotalus stephensi
| California, Nevada | X | C&E California and SW Nevada |
Crotalus tigris
| Arizona | S |
Crotalus viridis
| Arizona | NE+SE | |
| British Columbia. Alberta, Saskatchewan | S | Southern Alberta and Saskatchewan |
| Minnesota, Iowa, Missouri | NW? | Western Iowa only |
| Nebraska, Kansas, Oklahoma | X | |
| New Mexico | X | |
| Texas | W+C | |
| Utah, Colorado | X | Colorado and SE Utah |
| Washington, Oregon, Idaho, Montana, Wyoming, North & South Dakota | E | Montana, Western Idaho, Wyoming, Nortzh and South Dakota |
Crotalus willardi
| Arizona | SE | |
| New Mexico | SW |