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.2 TAIL PATTERN Both species have extensive white on the outer-tail feathers, this being prominent in flight, but the pattern ... unmoulted individuals can look darker, worn and streakier, while some rather dishevelled and a#39;moth-eatena#39; birds areanbsp;...
|Title||:||The Helm Guide to Bird Identification|
|Publisher||:||A&C Black - 2014-03-27|