Acknowledgments

Shawn Billerman, Science Editor, carefully revised the texts of versions 2.0 and 3.0, which has resulted in a considerable improvement of the contents. Peter Pyle, Associate Editor, revised and edited the Plumages and Molts sections.

Dr. Gerald Mayr, Sektionleiter Ornithologie, Senckenberg Museum, Frankfurt am Main, in Germany, provided information about type material of Vultur chassefiente in their collections. Dr. Mark Adams, Senior Curator, Bird Group, Department of Life Sciences, The Natural History Museum, in Tring, UK, provided information and comments about type material of Gyps hispaniolensis.

I thank Dr. Stavros Xirouchakis, of the University of Crete, School of Sciences & Engineering, Natural History Museum, University Campus (Knossos), Heraklion, in Crete (Greece), Dr. Juan Antonio Fargallo, of the Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, in Madrid (Spain), Dr. Antoni Margalida, of the Instituto de Investigación en Recursos Cinegéticos (CSIC), in Ciudad Real (Spain), and Dr. Todd E. Katzner, of the Forest & Rangeland Ecosystem Science Center, U. S. Geological Survey, 970 Lusk St., Boise, ID, 83706, U. S. A., for the revision of drafts of the account. Dr. Rigas Tsiakiris, of the Department of Forest Management, Forestry Service of Ioannina, in Epirus, Greece, provided information about island populations of Eurasian Griffon in Greece.

I thank Dr. Todd E. Katzner and Sergey Sklyarenko, Head of the Centre for Conservation Biology, Science Director, Association for the Conservation of Biodiversity of Kazakhstan, for unpublished information on Eurasian Griffon and Himalayan Griffon (Gyps himalayensis) interactions.

Dr. Íñigo Zuberogoitia, of Estudios Medioambientales Icarus S. L., C/San Vicente, 8. 6 a Planta, Dpto. 8, Edificio Albia I, 48001 Bilbao, Bizkaia, in Spain, provided measurements of the Eurasian Griffon.

Prof. Boyko B. Georgiev, of the Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, in Sofia, provided information on endoparasites.

Ignacio Pino, librarian of the Museo Nacional de Ciencias Naturales (CSIC), in Madrid, provided essential assistance with references, and Alexander Y. Sokolov, of the Belogorye Reservation, in Borisovka, Belgorod Region, Russia, was helpful with the Russian literature. Dr. Antoni Margalida, Dr. Todd E. Katzner, Prof. Marco Apollonio, of the Università degli Studi di Sassari, Sassari, Italia, Dr. Goran Sušić, of the Ornitološka postaja Rijeka HAZU/Ornithological station Rijeka CASA, Ružićeva 5/2, HR-51000 Rijeka, in Croatia, Dr. Reto Spaar, Schweizerische Vogelwarte Sempach, Luzernerstrasse 6, CH-6204 Sempach, Switzerland, and Gijs Baldee, librarian, Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden, The Netherlands, were helpful with some difficult to find references.