1. Department of Biology and Smithsonian Mason School of Conservation George Mason University Fairfax Virginia USA
2. Department of Environmental Science and Policy George Mason University Fairfax Virginia USA
3. Department of Biology George Mason University Fairfax Virginia USA
4. Radboud University Nijmegen the Netherlands
5. BirdLife International Cambridge UK
6. International Union for Conservation of Nature Gland Switzerland
7. International Union for Conservation of Nature Cambridge UK
8. American Bird Conservancy The Plains Virginia USA
9. Global Wildlife Conservation Austin Texas USA
10. Department of Zoology University of Cambridge Cambridge UK