2003 PB in nice clean condition. Whether soaring or perched, diurnal birds of prey often present challenging identification problems for the bird enthusiast. Variable plumage, color morphs, and unique individual characteristics are just some of the factors bird watchers must consider when identifying the different species. In this authoritative reference, two of the world's top experts on raptors provide an essential guide to the variations in the species, allowing for easier recognition of key identification points. All the distinguishing marks described have been exhaustively tested in a wide range of field conditions by the authors as well as the colleagues and students who have learned from them.
From recent-ish Amazon/GoodReads reviews: "The best. I have legit owned this for 18 years, since it first was published - and this copy was for my brother in law, a fledging birder for the holidays. So glad it's still in print. If you don't have an amazing raptor guide, look no further."; "I am very happy with the descriptions and full color photos. Living somewhere that has almost all of these birds makes identifying them difficult, and this will help."; "This was a gift, and the recipient loved it!"