Buff-tailed Sicklebill. Description. The diet consists mainly of fruits and arthropods. With up to 110 cm in length, the male Black Sicklebill is the longest member of Paradisaeidae, though the Curl-crested Manucode has a larger body [1]. The male is polygamous and performs a horizontal courtship display with … Etymology. Drepanornsis albertisi. IUCN Red List of Threatened Species. The sicklebill’s diet consists mainly of fruits and arthropods. The black-billed sicklebill (Drepanornis albertisi), also known as buff-tailed sicklebill (leading to easy confusion with the hummingbird of the same name), is a species of bird-of-paradise.It, along with its congener, are the only members of the genus Drepanornis. Version 2013.2. International Union for Conservation of Nature. The male of the species performs a horizontal courtship display with the pectoral plumes raised around its head. Sexually dimorphic. ^ "Epimachus fastosus". Retrieved 26 November 2013. Scientific name. The black-billed sicklebill (Drepanornis albertisi), also known as buff-tailed sicklebill (leading to easy confusion with the hummingbird of the same name), is a species of bird-of-paradise.It, along with its congener, are the only members of the genus Drepanornis. The brown sicklebill is large, up to 96 cm long, dark blue and green with highly iridescent plumages, a sickle-shaped bill, pale blue iris and brown underparts. Common name. 2012. Adult male, 35 cm long; adult female, 33 cm. The Paradise Bird Dance The Bird-of-Paradise and its colorful courtship (mating) dance ENG His female watches him from the branch. The male is adorned with ornamental plumes on the sides of its rear and a huge sabre-shaped central tail feathers that are highly prized by natives.The female is a reddish-brown bird with buff barred black below. Drepanornis (Greek, sickle bird); albertisi (named after Italian naturalist and explorer, LM D’Albertis).