Isla San Esteban Rattlesnake
Federal and State Protections
Countries of Occurrence
States or Providence
This medium-sized rattlesnake is unique to Isla San Esteban in the Gulf of California. It was previously considered a subspecies of the Black-tailed Rattlesnake (Crotalus molossus) but was elevated to full species status in 1999.
It thrives in xeric thornscrub and rocky hillsides on the island.