White-rumped Swiftlet
The White-rumped Swiftlet (Aerodramus spodiopygia) is a species of
swift found in American Samoa, Fiji, New Caledonia, Papua New Guinea, Samoa, Solomon Islands, Tonga, and Vanuatu. Birds in Australia are now often treated as a separate species, Australian Swiftlet (Aerodramus terraereginae). Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist mountain forests, and rocky areas.
Like small bats, it has sonar ability. It can navigate easily in dark caves using echolocation. It builds its nest in large cavities in caves. Colonies of tiny cup-shaped nests, made from plant matter and feathers cemented together with hardened saliva, are glued closely together on the rock walls. Usually one white egg is laid in each.