Bellowing Bison (2 of 2) (AUDIO) University of California - Davis Your browser does not support the audio element. Caption The lowest-ranking bull is the loudest contender in this bellowing contest between several rivals in Nebraska's Fort Niobrara National Wildlife Refuge. Credit Megan Wyman/UC Davis audiography (c) UC Regents Usage Restrictions This audio 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.