Tiger Rattlesnake (Crotalus tigris) (IMAGE) Proceedings of the National Academy of Sciences Caption The Tiger Rattlesnake (Crotalus tigris) possesses a highly neurotoxic, simple venom, that feeds on small mammals and lizards. Santa Catalina Mountains, Pima County, AZ, USA. Credit Image credit: Wolfgang Wüster (Bangor University, Bangor, UK) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.