1. Department of Biology, University of Nevada, Reno, 1664 North Virginia Street, Reno, NV 89557 U.S.A.
2. Teton Raptor Center, P.O. Box 1805, Wilson, WY 83014 U.S.A.
3. East Bay Regional Park District, 2950 Peralta Oaks Court, Oakland, CA 94605 U.S.A.
4. Division of Geology and Geography, West Virginia University, Morgantown, WV 26506 U.S.A.
5. Virginia Department of Game and Inland Fisheries, 115 Lee Highway, Verona, VA 24482 U.S.A.
6. Craighead Beringia South, P.O. Box 147, Kelly, WY 83011 U.S.A.
7. Wildlife Consulting and Photography, 2624 Eagle Avenue, Alameda, CA 94501 U.S.A.
8. Raptor View Research Institute, P.O. Box 4323, Missoula, MT 59806 U.S.A.
9. Division of Forestry and Natural Resources, West Virginia University, Morgantown, WV 26506 U.S.A.
10. Forest & Rangeland Ecosystem Science Center, U.S. Geological Survey, 970 Lusk Street, Boise, ID 83706 U.S.A.
11. Cellular Tracking Technologies, LLC, 2405 North Center Avenue, Somerset, PA 15501 U.S.A.
12. Natural Resource Geospatial, P.O. Box 1542, Yreka, CA 96097 U.S.A.
13. National Park Service, 4175 Geist Road, Fairbanks, AK 99709 U.S.A.
14. U.S. Fish and Wildlife Service, Division of Migratory Birds, Southwest Region, Albuquerque, NM 87103 U.S.A.
15. HawkWatch International, 2240 South 900 East, Salt Lake City, UT 84106 U.S.A.
16. H.T. Harvey & Associates, 983 University Avenue, Building D, Los Gatos, CA 95032 U.S.A.
17. U.S. Fish and Wildlife Service, Division of Migratory Birds Management, Mountain Prairie Region, P.O. Box 25486, Denver Federal Center, Denver, CO 80225 U.S.A.
18. Washington Dept. of Fish and Wildlife, 600 Capitol Way N., Olympia, WA 98501 U.S.A.
19. U.S. Fish and Wildlife Service, Division of Migratory Birds Management, Mountain Prairie Region, P.O. Box 2530, Corvallis, OR 97339 U.S.A.