Bellowing Bison (1 of 2) (IMAGE) University of California - Davis Caption A bull bison (right) bellows as he guards a female from other males. Credit Megan Wyman/UC Davis Photography (c) UC Regents Usage Restrictions Image may only be used with appropriate caption and credit. 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.