The male black sicklebill, with its long tail, is the longest species at . The call of the pale-billed sicklebill consists of musical whistling and some high pitched notes. The true unusual call is found in the brown sicklebill (see that species). The black sicklebill is a very bizarre species of bird of paradise. The brown sicklebill ("Epimachus meyeri"), also known as Bee's sicklebill, is a species of bird-of-paradise. The pale-billed sicklebill is distributed to lowland rainforests of northern and northwestern New Guinea. The white-tipped sicklebill ("Eutoxeres aquila") is a species of hummingbird in the family Trochilidae. The common name "sicklebill" refers to their long, decurved, sickle-shaped bill. The black-billed sicklebill is found in mountainous areas in western, central, and eastern New Guinea.