The Emperor bird-of-paradise, Paradisaea guilielmi, is a striking species, notable for its size, which is approximately 33 cm in length. The males are particularly resplendent with their dark emerald green face and throat, complemented by two elongated tail wires and large, white ornamental flank plumes. Females, while similar in appearance to the males, are distinguished by their all-brown plumage and lack of ornamental plumes, and are slightly smaller in stature.
When identifying the Emperor bird-of-paradise, look for the male's vibrant green facial area and the distinctive white plumes that adorn its flanks. The reddish-brown iris, bluish-grey bill, and purplish-brown legs are also key features. Females can be identified by their uniform brown coloration and absence of the male's ornamental feathers.
This species is endemic to the hill forests of the Huon Peninsula in Papua New Guinea, where it finds sanctuary among the dense foliage.
The Emperor bird-of-paradise is confined to the Huon Peninsula, making it a species with a limited range within Papua New Guinea.
These birds are known for their unique courtship displays, where the males perform an inverted display, a trait shared only with the blue and red birds-of-paradise within the Paradisaea genus.
The diet of the Emperor bird-of-paradise primarily consists of fruits and figs, supplemented by a variety of arthropods.
The Emperor bird-of-paradise is currently classified as Near Threatened on the IUCN Red List of Threatened Species. This status is due to ongoing habitat loss, its restricted range, and overhunting in certain areas. It is also listed on Appendix II of CITES, reflecting the need for monitoring international trade to ensure its survival.