evidence: - Covers Ethiopia, Eritrea, Djibouti, Somalia, and the Socotra archipelago - Features more than 2,600 illustrations on 213 stunning color plates - Provides a color distribution map for every species - Detailed species accounts on facing pages describe key identification features, similar species, geographical variation, habitat, status, and voice - Includes a glossary, identification tips, and information about habitats - Key identification features are shown more prominently in the text - Now includes an annotated distributional checklist by country and a comparison table for large white-headed gulls