Barn Owls to Hummingbirds. Prólogo sobre indicadores de riesgo y evaluación de estado en las aves. Más de 8000 referencias bibliográficas.
Thomas Züchner: Alexander Koenig Research Institute and Zoological Museum, Bonn, Germany K. L. Wood: Owl Research Institute, Missoula, Montana, USA. David R. Wells: Research affiliate, University Museum of Zoology, Cambridge, England formerly University of Malaya, Kuala Lumpur,Malaysia. A. A. Weller: Department of Ornithology, Alexander König Research Institute and Museum of Zoology, Bonn, Germany. B. T. Thomas: Formerly Independent Researcher, Venezuela, late of Virginia, USA. F. G. Stiles: Professor and Curator of Ornithology, Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá, Colombia. K. P. Segars: Owl Research Institute, Missoula, Montana, USA. P. E. Scott: Assistant Professor of Life Science, Indiana State University, Terre Haute, Indiana, USA. K. L. Schuchmann: Curator and Lecturer, Department of Ornithology, Alexander König Research Institute and Museum of Zoology, and University of Bonn, Bonn, Germany. M. S. Roy: Lecturer and Research Scientist in Evolutionary and Conservation Genetics, University of Otago, Department of Zoology, Dunedin, New Zealand.
J. H. Rappole: Research Scientist, Conservation and Research Center, National Zoological Park, Smithsonian Institution, Front Royal, Virginia, USA. José Luis Rángel Salazar : D. R. Powers: Professor, Biology Department, George Fox University, Newberg, Oregon, USA. A. T. Peterson: Associate Professor and Curator, University of Kansas Natural History Museum, Lawrence, Kansas, USA. J. L. Petersen: Owl Research Institute, Missoula, Montana, USA. P. D. Olsen: Australian National University, Canberra, Australia. H. Mikkola: Department of Applied Zoology and Veterinary Medicine, University of Kuopio, Kuopio, Finland. J. S. Marks: Assistant Professor, Division of Biological Sciences and Wildlife Biology Program, University of Montana, Missoula, Montana, USA. D. T. Holyoak: Consultant, Cornwall, England. D. W. Holt: Owl Research Institute, Missoula, Montana, USA. C. Hinkelmann: Bardowick, Germany. I. Heynen: Wuppertal, Germany. M. Heindl: Munich, Germany. Jon Fjeldså: Zoologisk Museum, Københavns Universitet, Denmark. P. L. Enríquez Rocha: El Colegio de la Frontera Sur, San Cristóbal de las Casas, Chiapas, Mexico. C. Deppe: N. J. Collar: Research Fellow, BirdLife International, Cambridge, England.
Mario Cohn-Haft, Nigel Cleere, P. Chantler: Freelance Ornithologist, Kent Ornithological Society, England. P. Chai: Department of Zoology, University of Texas, Austin, Texas, USA. R. J. Cannings: Freelance Biologist and Consultant, Naramata, British Columbia, Canada. W. A. Calder: Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, USA. R. Bündgen: Department of Ornithology, Alexander König Research Institute and Museum of Zoology, Bonn, Germany. Murray D. Bruce: Biocon Research Group, Turramurra, Australia. R. Berkley, D. L. Altshuler: Graduate Research Fellow, Department of Zoology, University of Texas, Austin, Texas, USA. ARTISTS: Richard Allen, Norman Arlott, Eustace Barnes, Hilary Burn, Clive Byers, John Cox, Mark Hulme, Francesc Jutglar, Àngels Jutglar, Ian Lewington, Toni Llobet, Hector C. Miranda, jr., Dave Nurney, Douglas Pratt, Lluís Sanz, Etel Vilaró, Jan Wilczur, Ian Willis, Tim Worfolk.
