Atiu swiftlet

The Atiu swiftlet or Sawtell's Swiftlet (Aerodramus sawtelli) is a species of bird in the swift family, endemic to Atiu in the Cook Islands.

Atiu swiftlet
Conservation status
Vulnerable  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Clade:	Strisores
Order:	Apodiformes
Family:	Apodidae
Genus:	Aerodramus
Species:	A. sawtelli
Binomial name
Aerodramus sawtelli (Holyoak, 1974)
Synonyms
Collocalia sawtelli

This small, dark swift measures 10 cm (3.9 in) long. It is sooty-brown above, slightly lighter below.^[2]

Its natural habitats are the island's fernlands and mixed horticultural areas over which it feeds, and in makatea limestone caves within which it nests.^[2] The species is known on Atiu as kopeka.

Unlike all other swiftlets, it echolocates only through single clicks, rather than a mix of single- and double clicks.^[3]