White-rumped Swiftlet (Aerodramus spodiopygius) [XC383076]
by Todd Mark from A'opo Lava Tube, Gaga'ifomauga, Western Samoa (echolocation clicks)
White-rumped Swiftlet (Aerodramus spodiopygius) [XC184177]
by Todd Mark from Aketatagapa Cave, Rotokas, Autonomous Region of Bougainville, Papua New Guinea (call)
Nest
Small halp-cups of vegatable material, including fine moss and tree fragments, with a few feathers, the whole cemented together with saliva, attacheed to a sloping roof of a cave or rocky recess, in colonies.
Eggs (Guide)
1; white; long-oval; about 18 x 13 mm. Incubation: about 22 days; by both sexes.
Young
Altricial, nidicolous. Fledge in 40 - 50 days. Fed by both parents.
Subspecies
White-rumped Swiftlet (Aerodramus spodiopygius) and Australian Swiftlet (Aerodramus terraereginae) (Sibley and Monroe 1990, 1993) have been lumped into Collocalia spodiopygius following Christidis and Boles (1994). However, Aerodramus spodiopygius was again split into White-rumped Swiftlet (Aerodramus spodiopygius) and Australian Swiftlet (Aerodramus terraereginae) by Christidis and Boles (2008). BirdLife International does not recognize this as a full species.
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