African Sacred Ibis with crab, African Sacred Ibis, Threskiornis aethiopicus, Rietvlei Nature Reserve, South Africa. - stock photo

The African Sacred Ibis (Threskiornis aethiopicus) is a large, mostly white ibis with a heavy, decurved, black bill. Adults have naked, black head and neck. Flight feathers are tipped black, giving narrow, black edge to wing. Common resident, a summer visitor in much of the interior; in open habitats, from wetlands and fields to grassland and offshore islands; often at refuse tips. Often in flocks; frequently flies in V formation. Breeds colonially in trees or reeds, usually with egrets, herons and cormorants.