1. The Peregrine Fund, 5668 West Flying Hawk Lane, Boise, ID 83709 USA
2. Aves Rapaces en Bolivia – Programa de Investigación, Calle El Villar 369, Sucre, Bolivia and Museo Nacional de Historia Natural, Calle 26 s/n, Cota Cota, La Paz, Bolivia
3. Calle 107A No. 7-82, Apto 501, Bogota, Colombia
4. Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, P/Bag X01, Pietermaritzburg, 3209, South Africa
5. Convention on Migratory Species (Abu Dhabi Office), PO Box 45553, Abu Dhabi, United Arab Emirates
6. Cornell University and the Cornell Lab of Ornithology, 159 Sapsucker Woods Road, Ithaca, NY 14850 USA
7. Department of Biological Sciences and Raptor Research Center, Boise State University, 1910 University Drive, Boise, ID 83725 USA
8. Endangered Wildlife Trust, Glen Austin AH 1685, South Africa
9. Habitat Info Ltd, Rookwood Studios, Llanunwas, Solva, Pembrokeshire, SA62 6UJ, UK
10. Hawk Mountain Sanctuary Association, Acopian Center for Conservation Learning, 410 Summer Valley Road, Orwigsburg, PA 17961 USA
11. HawkWatch International, 2240 South 900 East, Salt Lake City, UT 84106 USA
12. HawkWatch International, 2240 South 900 East, Salt Lake City, UT 84106 USA and Migratory Bird Center, Smithsonian Conservation Biology Institute, National Zoological Park, MRC 5503, Washington, DC 20013 USA
13. Himalayan Nature, Ganesh Marg, Chabahil, PO Box 10918, Kathmandu, Nepal
14. Konrad Lorenz Research Centre, Department of Behavioral and Cognitive Biology, University of Vienna, Fischerau 11, 4645 Grünau/Almtal, Austria
15. School of Biological and Marine Sciences, University of Plymouth, Plymouth, PL4 8AA, UK and The Peregrine Fund, 5668 West Flying Hawk Lane, Boise, ID 83709 USA
16. Vulture Conservation Foundation, Wuhrstrasse 12, 8003 Zurich, Switzerland and International Bearded Vulture Monitoring (IBM), Wuhrstrasse 12, 8003 Zurich, Switzerland