Collocalia hirundinacea The mountain swiftlet (Aerodramus hirundinaceus) is a species of swift in the family Apodidae.

The species is divided into three subspecies,[2] with the nominate, A. h. hirundinacea ranging over most of New Guinea, the subspecies A. h. excelsus occurring over 1600 m in the Snow Mountains and Cartenz peaks of Irian Jaya and A. h. baru being restricted to Yapen Island.

Like other members of the genus this species is able to echolocate, a trait it uses to navigate itself in the caves it breeds in.

Like the rest of its genus it breeds in caves, constructing nests of vegetation such as ferns, rootlets and grasses, or lichens, held together with saliva.

The peak of the breeding season is October through December, but there are occupied nests through most of the year.