1. Biology Department, Colorado State University, Fort Collins, Colorado, USA
2. Center for Tropical Research, Institute of the Environment and Sustainability, University of California, Los Angeles, Los Angeles, California, USA
3. Department of Biological Sciences and Raptor Research Center, Boise State University, Boise, Idaho, USA
4. Department of Evolution and Ecology, University of California Davis, Davis, California, USA
5. Fisheries Ecology Division, Southwest Fisheries Science Center, National Marine Fisheries Service, Santa Cruz, California, USA
6. U.S. Geological Survey, Texas Cooperative Fish and Wildlife Research Unit, Texas Tech University, Lubbock, Texas, USA
7. Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, British Columbia, Canada
8. Central Wisconsin Kestrel Research, Amherst, Wisconsin, USA
9. The Peregrine Fund, Boise, Idaho, USA
10. Fish and Wildlife Research Institute, Florida Fish and Wildlife Conservation Commission, Gainesville, Florida, USA
11. Shenandoah Valley Raptor Study Area, Timberville, Virginia, USA
12. HawkWatch International, Salt Lake City, Utah, USA
13. Yosemite Area Audubon Society, Raymond, California, USA
14. U.S. Fish and Wildlife Service, Fairbanks, Alaska, USA
15. Hawk Mountain Sanctuary, Orwigsburg, Pennsylvania, USA
16. Department of Environmental Studies, Pacific University, Forest Grove, Oregon, USA
17. Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, USA