Bruce M. Beehler is a research associate in the Division of Birds at the National Museum of Natural History in Washington, D.C. He served as a scientist and conservationist for the Smithsonian Institution, Conservation International, U.S. Department of State, and Wildlife Conservation Society. His previous books includeLost Worlds: Adventures in the Tropical Rainforest andNorth on the Wing: Travels with the Songbird Migration of Spring.