Many warblers are notoriously difficult to identify in the field (and even in the hand!) and, until now, there has been no definitive guide to the species of th

A reference to warblers in Europe, Asia and North Africa, illustrated in colour, perched and in flight with distribution maps, geographical variations of subspe

This eagerly awaited guide offers the most comprehensive treatment ever published on the gulls of Europe, Asia and North America. A total of 43 species is treat

Based on phylogenetic research, this complete study of the genus Sylvia describes two new species and establishes identification criteria for all members of the

A field guide that revolutionizes warbler identification Warblers are among the most challenging birds to identify. They exhibit an array of seasonal plumages a