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crested treeswift
The crested treeswift (''Hemiprocne coronata'') is a kind of tree swift. The tree swifts are aerial near passerine birds, closely related to, but distinct from the true swifts. They are restricted to southeast Asia and Australasia.
It was formerly considered conspecific with its eastern relative, the grey-rumped treeswift (''Hemiprocne longipennis''), but they do not interbreed where their ranges overlap.
==Description==
The crested treeswift is a large slender bird at length. This species is dove grey above and white below. The long swept-back wings are a darker grey above. This treeswift has a crest and a long, deeply forked tail. The adult male has orange sides to its face. Young birds have a dark grey head and wings, but the rest of the soft plumage is much streakier than that of the adults.
The call of this species is a harsh ''kee-kyew''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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