
Photo: Stuart Price · CC BY-SA 2.0
Apus pacificus
Range
Breeds in eastern Asia; winters in Southeast Asia and Australia
The Pacific swift is a strongly migratory swift that breeds in eastern Asia and spends the Northern Hemisphere winter in Southeast Asia and Australia. Its general shape and blackish plumage resemble the common swift, but the Pacific swift is distinguished by a conspicuous white rump band and strongly marked underparts. (Wikipedia, general species account)