Bildstein, Director of Conservation Science at the Acopian Center for Conservation Learning, Hawk Mountain Sanctuary, provides an accessible account of the history, ecology, geography, science and conservation efforts surrounding the migration of approximately 200 species of raptors between their summer breeding sites and their wintering grounds. He summarizes current knowledge about how the birds' bodies handle the demands of long-distance migration and how they know where to go. Annotation ©2006 Book News, Inc., Portland, OR (booknews.com)