Eric Centenero Alcala
Santa Catalina Island Rattlesnake
Federal and State Protections
Countries of Occurrence
States or Providence
Baja California Sur
22.4in (57cm) to 33.5in (85cm)
The Santa Catalina Island Rattlesnake is endemic to Isla Santa Catalina in the Gulf of California. It is an especially slender, medium size rattlesnake. Among other rattlesnakes it is unique in that it lacks a functioning rattle, as the base "button" falls off with every new shed, preventing growth of the rattle.
Small mammals and lizards provide a stable food source for this species. It is also remarkable in that it is the most arboreal of the known rattlesnake species, often using trees and shrubs to hunt. Experts believe that this species rose from Red Diamond Rattlesnakes (Crotalus ruber) which washed ashore on Isla Santa Catalina long ago.
It faces extinction due to illegal poaching and invasive predators (such as feral cats).