Salt marsh harvest mouse belly ID (IMAGE) University of California - Davis Caption A field biologist checks the belly of a live salt marsh harvest mouse to confirm its species identification. Its coloring helps distinguish it from other mouse species. Credit Mark Statham, UC Davis Usage Restrictions Provide 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.