How accurate is Birdsong's bird identifier?

It runs Google's Perch, a research-grade acoustic model covering nearly 15,000 species. When a call is ambiguous, we say so honestly and let you record a second clip to confirm, rather than guessing.

Is my recording stored?

No. Your audio is used to identify the bird in the moment and isn't saved to our servers. The birds you confirm are kept as cards in your own field journal; the recordings themselves are not.

Is the bird identifier free?

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Birdsong field guide

Atiu Swiftlet

Aerodramus sawtelli

The Atiu Swiftlet, locally known as the Kopeka, is a small, dark-plumaged apodid endemic to the island of Atiu, uniquely adapted for cave-dwelling life.

What it sounds like

High-pitched twittering vocalizations in flight; distinctive, sharp metallic 'click-click' pulses used for echolocation inside caves.

Reference call, compare with what you heard

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Rec. JACOB Hervé · New ZealandCC BY-NC-SA Xeno-canto

Field notes

It is strictly endemic to the 27-square-kilometer island of Atiu in the Cook Islands.
The species utilizes audible echolocation, producing rapid 'clicks' to navigate through pitch-black limestone caves.
Unlike the edible-nest swiftlets, its nests are constructed from a mixture of saliva and plant fibers like grasses or coconut husks.
It is a highly aerial insectivore, spending the vast majority of its daylight hours on the wing foraging over the island's forest and gardens.
Each clutch typically consists of only two eggs, with nesting sites restricted to a small number of specific limestone sinkholes.

Habitat

Limestone caves (Makatea) for nesting and roosting; forests, fernlands, and agricultural areas for foraging.

Range

Atiu, Cook Islands

Similar & commonly confused birds

Ameline SwiftletAerodramus amelis Australian SwiftletAerodramus terraereginae Bare-legged SwiftletAerodramus nuditarsus Black-nest SwiftletAerodramus maximus Caroline Islands SwiftletAerodramus inquietus Himalayan SwiftletAerodramus brevirostris Indian SwiftletAerodramus unicolor Mariana SwiftletAerodramus bartschi

Heard a Atiu Swiftlet?

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