The black-billed sicklebill (Drepanornis albertisi), also known as the buff-tailed sicklebill (leading to easy confusion with the hummingbird of the same name), is a species of bird-of-paradise.
A specific type of bird-of-paradise, known by its scientific name Drepanornis albertisi and colloquially referred to as either the black-billed or buff-tailed sicklebill, is being discussed here.