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
Pit vipers
| Crotalus angelensis | E | Isla Angel de La Guardia only |
| Crotalus catalinensis | SE | Isla Santa Catalina only |
| Crotalus cerastes | NE | |
| Crotalus enyo | X | |
| Crotalus helleri | N+C | |
| Crotalus lorenzoensis | E | only on Isla San Lorenzo |
| Crotalus mitchelli | X | |
| Crotalus oreganus | X | also on Isla Santa Catalina and Isla Coronado del Sur |
| Crotalus polisi | E | only on Isla Cabeza de Caballo |
| Crotalus pyrrhus | N | also on Isla El Muerto |
| Crotalus ruber | X | also on Isla de Santa Margerita, Isla de Cedros and Isla San Jose |
| Crotalus thalassoporus | E | on Isla Piojo only |
| Crotalus tortugensis | E | Ilsa de Tortuga only |