Common English names : Santa Catalina Rattlesnake , Santa Catalina Island rattlesnake Crotalus catalinensis is a species of venomous pit viper endemic to Isla Santa Catalina in the Gulf of California just off the east coast of the state of Baja California Sur , Mexico .
The Santa Catalina Rattlesnake ( Crotalus catalinensis ) , also known as the `` Santa Catalina Island Rattlesnake '' , is a species of venomous Pit viper found on Santa Catalina Island .