This ebook covers difficult identification issues by looking at tricky species pairs or groups of birds, and comparing and contrasting their respective features. Designed as a field companion, it supplements the standard field guides and provides much additional information. As well as detailed texts, the books include extensive illustrations of all relevant ages and plumages of the species concerned.Reviewa godsend to anyone wanting to tell a bar-tailed from a black-tailed godwit, a firecrest from a goldcrest or a greenfinch from a siskin.', --Daily Express'a helpful new book. ...It is carefully detailed but it is also agreeably written.', --TimesIt does exactly as it says on the cover. ...a fine book', Sunday Express 'this is an indispensable addition to your library.', --Scottish BirdsAbout the AuthorKeith Vinicombe is one of Britain's top ID experts, writing regularly for Birdwatch magazine on the subject. Alan Harris is one of the world's top bird artists. '