BOU Checklist No. 23. A complete systematic list of the avifauna with status and distribution details. Introductory section covers natural history, climate, vegetation, breeding, migration, conservation, taxonomy, and history of ornithological activity. An annotated checklist to the third largest island in the world, with over 630 species of birds, 11% of which are endemic. 28 color plates illustrate some of the extraordinary landscapes from around the island.