David Sibley, Clay Sutton Hardcover | 352 pages Nature / Birdwatching Guides An indispensable guide for hawk watchers, this is a completely new edition of the seminal book that introduced a holistic method for identifying distant birds in flight. Among the world's most popular birds, hawks can be some of the hardest birds to identify. They're most often seen flying high above and at a distance.In the first edition of Hawks in Flight, Pete Dunne, David Sibley, and Clay Sutton presented a holistic method of hawk identification, using general body shape, the way they move, and the places they are most likely to be seen.This new edition of the book that Roger Tory Peterson called a "landmark" integrates an array of carefully selected photographs, David Sibley's superb illustrations, and a clear, information-packed text and takes raptor identification to a higher level.