image of David Allen Sibley

David Allen Sibley

... Unknown

The Sibley Guide to Birds is a reference work and field guide for the birds found in the North American region as defined by the American Birding Association. It is written and illustrated by ornithologist David Allen Sibley. The book provides details on 810 species of birds, with information about identification, …

... Unknown

The Sibley Guide to Birds is a reference work and field guide for the birds found in the North American region as defined by the American Birding Association. It is written and illustrated by ornithologist David Allen Sibley. The book provides details on 810 species of birds, with information about identification, …