Non-Native Bison Roam Free on Catalina Island (image) Santa Catalina Island Conservancy Share Print E-Mail Caption Fourteen bison were brought to Catalina Island on Christmas Eve in 1924. Today the herd is successfully managed to a population around 150 with a contraceptive. Credit Photo by Jack Baldelli, courtesy Catalina Island Conservancy. Usage Restrictions Include photo credit as listed and with stories about study. Share Print E-Mail 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.