作者: Larsson Hans Larsson

Covering 22 species found in the Western Palearctic and North America, this guide lists each species under the sections of: field identification; moult; description; geographical variation; measureme …

This is the first complete identification guide to the skuas of the world. Skuas (and jaegers) are a fascinating and popular group of seabirds that make up a subfamily of just seven species. They can …

This is the first complete identification guide to the skuas of the world.Skuas (and jaegers) are a fascinating and popular group of seabirds that make up a subfamily of just seven species. They can …

Covering 22 species found in the Western Palearctic and North America, this guide lists each species under the sections of: field identification; moult; description; geographical variation; measureme …

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 treated, and every species is described in c …

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 treated, and every species is described in co …