1. Genetics Program, Smithsonian Institution, 3001 Connecticut Avenue, NW, Washington, D.C. 20008, USA
2. National Museum of Natural History, Bird Department, E 607 MRC 116, Washington, D.C. 20560, USA
3. Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, USA
4. 4109 Komes Court, Alexandria, Virginia 22306, USA
5. Department of Fishery and Wildlife Biology, Colorado State University, Fort Collins, Colorado 80512, USA