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Written by two of the world's most respected ornithologists, it contains the most up-to-date information available on bird identification covering all aspects of plumage, moult, ageing and sexing, with sections on voice and other identification criteria, and detailed taxonomic notes.The passerines are divided into two volumes, with the first covering larks, hirundines, pipits and wagtails, bulbuls, accentors, robins, chats, wheatears, thrushes, prinias and cisticolas, and warblers, and the second covering flycatchers, reedlings, tits, nuthatches, orioles and sunbirds, shrikes, corvids, finches and buntings, along with extreme vagrants.