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?

Yes — identify birds every day for free, no account required. Birdsong Pro ($3.99/mo or $39.99/yr) unlocks unlimited IDs, full field guides, your growing collection, and shareable Field Report cards.

Do I need an account or internet to identify a bird?

You'll need a connection to identify, since the AI runs in the cloud. No account is needed to try it — sign in with Google or email to save your field journal and sync it across devices.

Birdsong field guide

Bare-legged Swiftlet

Aerodramus nuditarsus

A medium-sized, dark swiftlet endemic to the New Guinea highlands, primarily distinguished from its relatives by its unfeathered lower legs.

What it sounds like

Rapid, high-pitched metallic clicks used for echolocation and dry, buzzy social twittering.

Reference call, compare with what you heard

No reference call found yet · Xeno-canto

Field notes

It is one of the species within the genus Aerodramus capable of using echolocation to navigate total darkness.
Unlike many of its close relatives, its tarsi are entirely bare, a key morphological feature for identification in the hand.
It primarily forages at high altitudes, typically between 1,400 and 3,200 meters above sea level.
Nests are constructed on cave walls using a combination of hardened saliva and organic materials like moss.
This species is known to participate in large, fast-moving mixed-species foraging flocks over mountain ridges.

Habitat

Montane forests, alpine grasslands, and deep limestone caves for nesting.

Range

New Guinea (central mountain ranges and Huon Peninsula).

Similar & commonly confused birds

Ameline SwiftletAerodramus amelis Atiu SwiftletAerodramus sawtelli Australian SwiftletAerodramus terraereginae Black-nest SwiftletAerodramus maximus Caroline Islands SwiftletAerodramus inquietus Himalayan SwiftletAerodramus brevirostris Indian SwiftletAerodramus unicolor Mariana SwiftletAerodramus bartschi

Heard a Bare-legged Swiftlet?

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