any of various birds having a markedly curved bill, such as Falculea palliata, a Madagascan bird of the family Vangidae, Hemignathus procerus, a Hawaiian honey creeper, and certain hummingbirds and birds of paradise
sicklebill in American English
(ˈsɪkəlˌbɪl)
US
noun
any bird with a sharply curved bill resembling a sickle, as a curlew or thrasher