Violet-Green Swallow in California Desert (IMAGE) University of California - Berkeley Caption A violet-green swallow in the California desert. Larger birds like these, which get most of their water from insects, are at risk as desert temperatures increase and they need more water -- and thus more food -- to keep cool. Credit Image courtesy of Sean Peterson Usage Restrictions None 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.