Thomas Eisner is the Jacob Gould Schurman Professor of Chemical Ecology at Cornell University. He is a world authority on animal behavior, ecology, and evolution, and is co-founder of chemical ecology, the discipline dealing with the chemical interactions of organisms. A field biologist with working experience on four continents, he is an active conservationist. He has served on the Board of Directors of the National Audubon Society, the Scientific Council of The Nature Conservancy, and is currently on the Board of Directors of the Union of Concerned Scientists. A member of the National Academy of Sciences and a fellow of the Royal Society, he is the recipient of numerous honors including the National Medal of Science and the Tyler Prize for Environmental Achievement. He is a well-known nature photographer, and has helped make award-winning film documentaries. Currently he is experimenting with new techniques in visual arts.