Salt marsh harvest mouse (IMAGE) University of California - Davis Caption The endangered salt marsh harvest mouse is endemic to the San Francisco Bay Area and easily mistaken for the abundant western harvest mouse. Credit William Thein 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.