Anna's Hummingbird (IMAGE) University of California - Berkeley Caption This adult male Anna's Hummingbird, Calypte anna, is an urban-adapted species. Unlike many other bird species in the Sierra Nevada mountains, the Anna's Hummingbird did not track its climatic niche. Instead, it moved away from it. 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.