The Anna's Paradise Bird measures approximately 28 cm (11 in) in length. The male has a glossy black body, with a yellow and green crown, and a long, curved beak. Its most distinctive feature, however, is its remarkable plumage, which includes long, ribbon-like feathers on its head, neck, and back. These feathers are an iridescent blue and green, with a distinctive crescent-shaped patch on the chest.