1. Wildlife and Ecology Unit, Veterinary Genetics Laboratory, 258 CCAH, School of Veterinary Medicine, University of California, Davis, One Shields Ave., Davis, California 95616, USA
2. Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, One Shields Ave., Davis, California 95616, USA
3. California Animal Health and Food Safety Laboratory, West Health Science Drive, Davis, California 95616, USA
4. The Hummingbird Monitoring Network, PO Box 115, Patagonia, Arizona 85624, USA
5. Lindsay Wildlife Museum, Denver Zoo, 2300 Steele Street, Denver, Colorado 80205, USA
6. Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, One Shields Ave., Davis, California 95616, USA