The Helm Guide to Bird Identification

This book 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 [...]
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This book 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 plummages of the species concerned.