Among the world's most popular birds, hawks can be some of the most difficult 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.The new edition of the book that Roger Tory Peterson called a "landmark" integrates an ...