This paper represents the cumulative efforts of hundreds of people over the course of the last 15 years, from all parts of Philippine society: to all we express our gratitude. For their assistance with many and various aspects of the terrestrial research, we especially thank the following people:
Ely Alcala, Philip Alviola, Nonito Antoque, Willy Arce, Glenn Bueser, Ron Crombie, Binky Dalupan, Finn Danielsen, Liza Duya, Mariano Roy Duya, Dolly Felicitas, Boying Fernandez, Linda Flores, Genevieve Gee, Tom Gnoske, Steven Goodman, Linda Gordon, Paul Heideman, Karl Hutterer, Arne Jensen, Hans Klompen, Maylene Laranjo, Myrissa Lepiten, Cres Lumhod, Toto Manamtam, Pacencia Milan, Marisol dG. Pedregosa, Town Peterson, Leonila Raros, Jim Rieger, Doug Sampson, Joel Sarmiento, David Schmidt, Leoning Tagat, Sweepea Veluz, Joe Walsh, David Willard, and the late Luz Auzejo and D. S. Rabor. For their help with field work on marine mammals, we thank the late Steve Leatherwood, Colin Wood, William Perrin, Joe Pres Gaudiano, Moonyeen Alava, Francisco Dagat, Esther Himoya, Teddy Redoble, Erwin Rommel Dulombal, Rowena Merto, Alfonso Pading, Ray Visitacion, Gusieppe Chiu, Gary Aries, Florian Bernado, Lemnuel Aragones, Cindy Hill, Earth Island tuna boat observers, Jun Paera, Ella Delfin, Romella Despu, Michel Gutierrez, Louie Paera, and Ryan and Chin Lai. We also thank the officials of the Department of Environment and Natural Resources who have supported and assisted our efforts, especially Alma Ballesfin, Corazon Catibog-Sinha, Mary Jean Caleda, Carlo C. Custodio, Wilbur Dee, Josie DeLeon, Luz Gonzales, Mundita Lim, Antonio Manila, Marlynn Mendoza, Samuel Penafiel, and Wilfrido Pollisco.
Numerous people at universities and a variety of nongovernmental organizations have given us aid in our work; we wish to offer special thanks to all of our colleagues at the Philippine National Museum, Silliman University, the University of the Philippines in Los Banos and Diliman, Minjanao State University and the Iligan Institute of Technology, the Haribon Foundation, the Visayas State College of Agriculture, the Smithsonian Institution, and the American Museum of Natural History for their good will and cooperation. We thank Guy Musser and Karl Koopman for their encouragement and tutoring in the fine arts of identification and taxonomy, and M. Carleton, P. Myers, and R. W. Thorington, Jr. for access to collections and continuing encouragement. Jodi Sedlock, Guy Musser, Karl Koopman, and Luis Ruedas gave helpful comments on an earlier draft of the manuscript. We thank Ron Crombie, Laurie Wilkins, and C. A. Ross for access to specimens and unpublished data. We thank Jodi Sedlock, Emily McGowan, and Clara Simpson for preparing the maps and figures, M. Morales, J. Phelps, M. Solomon, and especially W. T. Stanley for assistance at the Field Museum, and M. Pannell for her attention to a thousand details in having this paper become reality. Funding for marine mammal surveys was provided by the World Wildlife Fund through the Haribon Foundation, the Foundation for the Philippine Environment, the U.S. National Science Foundation (International Cooperative Project), the Earth Trust (U.S.), Earth Island (U.S.), the International Foundation for Science (Sweden), Greenpeace (U.S.), the Convention for Migratory Species (Germany), Ocean Park (Hong Kong), and the Whale and Dolphin Society (U.K.). Terrestrial studies have been supported by the U.S. National Science Foundation (BSR-85 14223), the John D. and Catherine T. MacArthur Foundation (90-09272A), and the Marshall Field, Barbara Brown, and Ellen Thome Smith funds of the Field Museum.