1. BirdLife International, Wellbrook Court, Cambridge CB3 0NA, UK.
2. RSPB, The Lodge, Sandy, Bedfordshire, SG19 2DL, UK.
3. United Nations Environment Programme World Conservation Monitoring Centre, 219 Huntingdon Road, Cambridge CB3 0DL, UK.
4. School of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9QG, UK.
5. Department of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK.
6. Woodrow Wilson School of Public and International Affairs, Princeton University, Princeton, NJ 08544, USA.
7. Center for Macroecology, Evolution and Climate, Department of Biology, University of Copenhagen, DK-1165 Copenhagen, Denmark.
8. Conservation Science Program, World Wildlife Fund, Washington, DC 20090, USA.
9. Research Institute for the Environment and Livelihoods, Charles Darwin University, Northern Territory 0909, Australia.
10. Pacific Cooperative Studies Unit (University of Hawai‘i at Manoa), Hawaii Division of Forestry and Wildlife, Honolulu, HI 96822, USA.
11. Science and Technical Group, Department of Conservation, Christchurch, New Zealand.
12. University of Freiburg, Faculty of Biology, Hauptstrasse 1, D-79104 Freiburg, Germany.
13. 12 Fishback Court, Warrenton, VA 20186, USA.