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 angelensis
Mexico and Central America
| Baja California (Mexico) | E | Isla Angel de La Guardia only |
Crotalus aquilus
Mexico and Central America
Crotalus armstrongi
Mexico and Central America
| Mexico (without Baja California) | W | Jalisco and Nayarit |
Crotalus atrox
Mexico and Central America
Crotalus basiliscus
Mexico and Central America
Crotalus campbelli
Mexico and Central America
| Mexico (without Baja California) | W | Nayarit, W Jalisco and NW Colima |
Crotalus catalinensis
Mexico and Central America
| Baja California (Mexico) | SE | Isla Santa Catalina only |
Crotalus cerastes
Mexico and Central America
Crotalus culminatus
Mexico and Central America
| Mexico (without Baja California) | C+S | Michoacan, Mexico, Puebla, Morelos, Guerrero and Oaxaca |
Crotalus ehecati
Mexico and Central America
| Mexico (without Baja California) | S | Chiapas and Oaxaca |
| Guatemala | W? |
Crotalus enyo
Mexico and Central America
Crotalus ericsmithi
Mexico and Central America
| Mexico (without Baja California) | SW | Guerrero |
Crotalus estebanensis
Mexico and Central America
| Mexico (without Baja California) | NW | only on Ilsa San Esteban |
Crotalus exiguus
Mexico and Central America
| Mexico (without Baja California) | S | Guerrero |
Crotalus helleri
Mexico and Central America
Crotalus intermedius
Mexico and Central America
Crotalus lannomi
Mexico and Central America
Crotalus lepidus
Mexico and Central America
Crotalus lorenzoensis
Mexico and Central America
| Baja California (Mexico) | E | only on Isla San Lorenzo |
Crotalus mictlantecuhtli
Mexico and Central America
| Mexico (without Baja California) | SE | Veracruz |
Crotalus mitchelli
Mexico and Central America
Crotalus molossus
Mexico and Central America
Crotalus morulus
Mexico and Central America
| Mexico (without Baja California) | E | Sierra Madre Oriental: Coahuila, Tamaulipas and possibly Nuevo Leonand |
Crotalus oreganus
Mexico and Central America
| Baja California (Mexico) | X | also on Isla Santa Catalina and Isla Coronado del Sur |
| Mexico (without Baja California) | NW? |
Crotalus ornatus
Mexico and Central America
| Mexico (without Baja California) | N | Chihuahua and Nuevo Leon |
Crotalus polisi
Mexico and Central America
| Baja California (Mexico) | E | only on Isla Cabeza de Caballo |
Crotalus polystictus
Mexico and Central America
Crotalus pricei
Mexico and Central America
Crotalus pusillus
Mexico and Central America
Crotalus pyrrhus
Mexico and Central America
| Baja California (Mexico) | N | also on Isla El Muerto |
| Mexico (without Baja California) | NW | NW Sonora |
Crotalus ravus
Mexico and Central America
Crotalus ruber
Mexico and Central America
| Baja California (Mexico) | X | also on Isla de Santa Margerita, Isla de Cedros and Isla San Jose |
Crotalus scutulatus
Mexico and Central America
Crotalus simus
Mexico and Central America
| Mexico (without Baja California) | S | Chiapas, Oaxaca, Vera Cruz, possiply also Tabasco and Campeche |
| Guatemala | X | |
| Belize | ?+X | |
| Honduras | X | |
| El Salvador | X | |
| Nicaragua | W+SW | |
| Costa Rica | NW |
Crotalus stejnegeri
Mexico and Central America
Crotalus tancitarensis
Mexico and Central America
| Mexico (without Baja California) | SW | Michoacan |
Crotalus thalassoporus
Mexico and Central America
| Baja California (Mexico) | E | on Isla Piojo only |
Crotalus tigris
Mexico and Central America
Crotalus tlaloci
Mexico and Central America
| Mexico (without Baja California) | S | Michoacan, Mexico, Morelos, Guerrero and possibly W Puebla |
Crotalus tortugensis
Mexico and Central America
| Baja California (Mexico) | E | Ilsa de Tortuga only |
Crotalus totonacus
Mexico and Central America
Crotalus transversus
Mexico and Central America
Crotalus triseriatus
Mexico and Central America
| Mexico (without Baja California) | C+E | Michoacan, Morelos, Hildago, Puebla and WC Vera Cruz |
Crotalus tzabcan
Mexico and Central America
| Mexico (without Baja California) | SE | Yucatan, Quintana Roo and Campeche |
| Guatemala | X | |
| Belize | X |
Crotalus viridis
Mexico and Central America
Crotalus willardi
Mexico and Central America