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

Great Knot

Calidris tenuirostris

The Great Knot is a large, robust shorebird famous for its extreme long-distance migrations and distinctive spotted breeding plumage.

What it sounds like

A low-pitched, husky, disyllabic 'nyut-nyut' or a short, whistling 'quer-wer'.

Reference call, compare with what you heard

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Rec. Christian A. Jensen · Russian FederationCC BY-NC-SA Xeno-canto

Field notes

It is the largest species in the genus Calidris, measuring up to 28 centimeters in length.
The species is classified as Endangered, largely due to the reclamation of critical mudflat stopover sites in the Yellow Sea.
During the breeding season, they occupy high-altitude stony tundra ridges in northeast Siberia.
They possess a highly specialized, muscular gizzard used to crush the shells of bivalves and gastropods swallowed whole.
Individuals can fly over 5,000 kilometers non-stop during their migration along the East Asian-Australasian Flyway.

Habitat

Alpine tundra during breeding; coastal mudflats, estuaries, and sandy shores during the non-breeding season.

Range

Breeds in Northeast Siberia; migrates to wintering grounds in Southeast Asia and Australia.

Similar & commonly confused birds

Baird's SandpiperCalidris bairdii Broad-billed SandpiperCalidris falcinellus Buff-breasted SandpiperCalidris subruficollis Curlew SandpiperCalidris ferruginea DunlinCalidris alpina Least SandpiperCalidris minutilla Little StintCalidris minuta Long-toed StintCalidris subminuta

Heard a Great Knot?

Open Birdsong, tap record, and identify the bird singing near you in seconds — then collect it in your field journal.

Identify a bird by its song