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?

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Birdsong field guide

Millerbird

Acrocephalus familiaris

The Millerbird is a small, critically endangered Old World warbler endemic to the Northwestern Hawaiian Islands. It is notable for being the only member of the Acrocephalidae family to have naturally colonized the Hawaiian archipelago.

What it sounds like

A complex, melodious song with flute-like warbles and trills, alongside sharp 'tchep' or 'chack' alarm notes.

Reference call, compare with what you heard

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Rec. Eric VanderWerf · United StatesCC BY-NC-SA Xeno-canto

Field notes

The species is named for its appetite for 'miller moths,' which were once a primary food source on Laysan Island.
Of the two subspecies, the Laysan Millerbird went extinct in the early 20th century, leaving only the Nihoa Millerbird extant.
Until 2011, the entire world population was confined to the 0.65-square-kilometer island of Nihoa.
Conservationists successfully translocated a population to Laysan Island to mitigate the risk of extinction from a single-island catastrophe.
They are highly territorial birds and may remain in the same small territory for their entire adult lives.

Habitat

Dense native shrubland dominated by Sida fallax and Chenopodium oahuense.

Range

Northwestern Hawaiian Islands (Nihoa and Laysan).

Similar & commonly confused birds

Aguiguan Reed WarblerAcrocephalus nijoi Aquatic WarblerAcrocephalus paludicola Australian Reed WarblerAcrocephalus australis Basra Reed WarblerAcrocephalus griseldis Black-browed Reed WarblerAcrocephalus bistrigiceps Blunt-winged WarblerAcrocephalus concinens Blyth's Reed WarblerAcrocephalus dumetorum Cape Verde Swamp WarblerAcrocephalus brevipennis

Heard a Millerbird?

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