1. The Peregrine Fund, 5668 West Flying Hawk Lane, Boise, Idaho, 83709, USA and; National Museums of Kenya; P.O. Box 40658-00100 Nairobi Kenya
2. School of Biology, University of St Andrews, Fife, KY16 9TH, UK and, Institute of Tropical Forest Conservation; Mbarara University of Science and Technology; P.O. Box 44 Kabale Uganda
3. Biodiversity Research Centre; University of British Columbia; Vancouver BC
4. Department of Animal Ecology; Alterra Wageningen University and Research Centre; Droevendaalsesteeg 3a, 6708 PB Wageningen Netherlands
5. Hawk Conservancy Trust, Andover, Hampshire, SP11 8DY, UK and, Centre for Wildlife Assessment and Conservation, School of Biological Sciences; University of Reading; Berkshire RG6 6AS UK
6. Centre National de la Recherche Scientifique; Museum National d'Histoire Naturelle; Paris France
7. Department of Biology; University of York; Wentworth Way York UK
8. Division of Biological Sciences; University of Missouri; Columbia MO 65211 USA
9. Department of Biological Sciences; Makerere University; P.O. Box 7298 Kampala Uganda
10. Tanzania Bird Atlas; P.O. Box 1605 Iringa Tanzania
11. Ezemvelo KwaZulu-Natal Wildlife; P.O. Box 13053 Cascades 3202 South Africa
12. Endangered Wildlife Trust; Private Bag X11 Modderfontein 1645 South Africa
13. The Peregrine Fund, 5668 West Flying Hawk Lane, Boise, Idaho, 83709, USA; National Museums of Kenya; P.O. Box 40658-00100 Nairobi Kenya
14. Department of Biological Sciences; University of Swaziland; Kwaluseni Swaziland
15. Beaty Biodiversity Research Centre; University of British Columbia; 6270 University Boulevard Vancouver V6T 1Z4 Canada