Appearance
The ribbon-tailed astrapia is medium-sized, up to 32 cm long . The body is velvet black. The male has an iridescent olive green and bronze plumage, and is adorned with ornamental "ball" plume above its bill and two extremely long, ribbon-like white tail feathers. The female is a brown bird with an iridescent head. Hybrids between this species and the Stephanie's astrapia, in the small area where their ranges overlap, have been named Barnes' astrapia.One of the most spectacular birds-of-paradise, the male ribbon-tailed astrapia has the longest tail feathers in relation to body size of any bird, over three times the length of its body.
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