he king bird-of-paradise (Cicinnurus regius) is a passerine bird of the Paradisaeidae (bird-of-paradise) family. It is considered by the IOC checklist to be the only member of the genus Cicinnurus, although the genus Diphyllodes is closely related and is subsumed under Cicinnurus by many other authorities.
The king bird-of-paradise is a common and wide-ranging species, distributed throughout lowland forests of New Guinea and western satellite islands. Some populations range quite high into the hills and lower mountains, and these are poorly known as yet.
The adult male has an overall metallic crimson color, slightly orange under certain lights, and more particularly so in the crown. They have a narrow, dark green iridescent breast band with whitish lower breast, and green-tipped fan-like plumes on shoulder. The feathers of the undertail and mantle are olive-brown, with iridescent green tips, and violet legs. Bills are ivory-yellow. Females have dull olive head and upperparts with yellowish underparts and violet legs.