Western Bluebird (IMAGE) University of California - Berkeley Caption This is an adult male Western Bluebird, Sialia mexicana, a low elevation species, holding a large beetle. This bird species was found to have shifted its geographical range in response to both temperature and precipitation. Credit Morgan Tingley photo Usage Restrictions Must include credit with photo. 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.