Select your current world region and subregion.
Distribution of terrestrial venomous snakes
Selection
| Occurrences in | |
|---|---|
| NW | the Northwest |
| N | the North |
| NE | the Northeast |
| W | the West |
| C | central areas |
| E | the East |
| SW | the Southwest |
| S | the South |
| SE | the Southeast |
| X | most areas |
| ? | unclear |
See also separate
distribution charts for various Colubrids
of lesser medical importance.
Distribution tables
Crotalus adamanteus
North America
| Arkansas, Louisiana | SE | Louisiana only |
| North & South Carolina, Georgia, Alabama, Mississippi | E+S | |
| Florida | X |
Crotalus atrox
North America
| California, Nevada | SE | |
| Arizona | X | |
| New Mexico | X | |
| Nebraska, Kansas, Oklahoma | X | Oklahoma only |
| Texas | X | |
| Arkansas, Louisiana | X | Arkansas only |
Crotalus cerastes
North America
| California, Nevada | C+SE | |
| Utah, Colorado | SW | Utah only |
| Arizona | W+SW |
Crotalus cerberus
North America
| Arizona | C+E | |
| New Mexico | W? |
Crotalus concolor
North America
| Washington, Oregon, Idaho, Montana, Wyoming, North & South Dakota | S | South Western Wyoming only |
| Utah, Colorado | X | Eastern Utah, Western Colorado |
Crotalus helleri
North America
| California, Nevada | SW | South Western California |
Crotalus horridus
North America
Crotalus lepidus
North America
| Arizona | SE | |
| New Mexico | S | |
| Texas | W |
Crotalus lutosus
North America
| Washington, Oregon, Idaho, Montana, Wyoming, North & South Dakota | X | Western Oregon, Central and Southern Idaho |
| California, Nevada | X | only NW California, all over Nevada |
| Utah, Colorado | W | Western Utah |
| Arizona | NW |
Crotalus mitchelli
North America
| California, Nevada | C+SE | |
| Arizona | W |
Crotalus molossus
North America
| Arizona | X | |
| New Mexico | X | |
| Texas | C+SW |
Crotalus oreganus
North America
| British Columbia. Alberta, Saskatchewan | SW | Southern British Columbia |
| Washington, Oregon, Idaho, Montana, Wyoming, North & South Dakota | X | |
| California, Nevada | X |
Crotalus ornatus
North America
| Texas | X |
Crotalus pricei
North America
| Arizona | SE |
Crotalus ruber
North America
| California, Nevada | SW | California only |
Crotalus scutulatus
North America
| California, Nevada | C+E | |
| Utah, Colorado | SW | Utah only |
| Arizona | X | |
| New Mexico | S | |
| Texas | SW |
Crotalus stephensi
North America
| California, Nevada | X | C&E California and SW Nevada |
Crotalus tigris
North America
| Arizona | S |
Crotalus viridis
North America
| British Columbia. Alberta, Saskatchewan | S | Southern Alberta and Saskatchewan |
| Washington, Oregon, Idaho, Montana, Wyoming, North & South Dakota | E | Montana, Western Idaho, Wyoming, Nortzh and South Dakota |
| Utah, Colorado | X | Colorado and SE Utah |
| Arizona | NE+SE | |
| New Mexico | X | |
| Nebraska, Kansas, Oklahoma | X | |
| Texas | W+C | |
| Minnesota, Iowa, Missouri | NW? | Western Iowa only |
Crotalus willardi
North America
| Arizona | SE | |
| New Mexico | SW |