1. U.S. Geological Survey, Eastern Ecological Science Center , Laurel, Maryland , USA
2. National Museum of Natural History, Smithsonian Institution , Washington, D.C. , USA
3. Cornell Laboratory of Ornithology , Ithaca, New York , USA
4. Department of Biology, San Diego State University , San Diego, California , USA
5. Museum of Vertebrate Zoology, University of California , Berkeley, California , USA
6. 24 Idaho Street, Bishop, California, USA
7. Departamento de Biología Evolutiva, Facultad de Ciencias, Museo de Zoología, Universidad Nacional Autónoma de México , Ciudad de México , México
8. Escuela de Biología, Universidad de San Carlos de Guatemala , Ciudad de Guatemala , Guatemala
9. Florida Museum of Natural History, University of Florida , Gainesville, Florida , USA
10. Museum of Natural Science and Department of Biological Sciences, Louisiana State University , Baton Rouge, Louisiana , USA
11. Michigan State University Museum and Department of Integrative Biology , East Lansing, Michigan , USA
12. Science & Education, Field Museum of Natural History , Chicago, Illinois , USA
13. University of Alaska Museum , Fairbanks, Alaska , USA