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

Asian House-Martin

Delichon dasypus

The Asian House-Martin is a small, gregarious passerine in the swallow family, notable for its blue-black plumage and prominent white rump.

What it sounds like

A dry, metallic 'zrit' or a soft, twittering 'chi-i' chirrup given frequently while in flight.

Reference call, compare with what you heard

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Rec. Ding Li Yong · ChinaCC BY-NC-ND Xeno-canto

Field notes

It is distinguished from the Common House-Martin by its duskier grey-washed underparts and a shallower tail fork.
The species breeds at high altitudes, often reaching elevations up to 5,000 meters in the Himalayas.
Nests are constructed from mud pellets into a closed cup with a small entrance slit, typically attached to cliff faces or building eaves.
It is a highly aerial feeder, specializing in 'aerial plankton' such as small flies, aphids, and hymenopterans caught in flight.
During the winter, populations migrate to lower latitudes across Southeast Asia, often forming large communal roosts.

Habitat

High-altitude cliffs, mountain ridges, and increasingly under the eaves of human-made structures.

Range

Breeds across the Himalayas, Central Asia, and Japan; winters in Southeast Asia and the Malay Archipelago.

Similar & commonly confused birds

Nepal House-MartinDelichon nipalense Siberian House-MartinDelichon lagopodum Western House-MartinDelichon urbicum

Heard a Asian House-Martin?

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