This paperback reprint of the second edition of Peter Grant's guide to the identification of gulls, brings this classic of modern field ornithology to an even wider audience than ever before. Long a favorite reference for the avid birder, it unlocks the secrets of the complex details of gull plumage, so variable in the successive age classes of the different species. Now it is possible to get to grips with those previously unidentifiable juveniles and to spot the vagrant species which often lurk in the midst of mixed species winter flocks. The first edition so sparked an interest in the details of gull identification that a revision was soon necessary to include the results of all the patient work of the newly inspired gull watchers. This revision covers all 31 species found on the east and west coasts of the United States and Canada, as well as those found in Europe. All the plumages of every species are described in detail and illustrated in 544 photographs and numerous detailed line drawings, making this the indispensable guide to this group of birds.