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

Bonin Grosbeak

Carpodacus ferreorostris

An extinct, robust finch characterized by its massive, powerful beak, formerly endemic to the Ogasawara Islands of Japan.

What it sounds like

Described by early explorers as a series of soft, clear, and high-pitched whistles.

Reference call, compare with what you heard

No reference call found yet · Xeno-canto

Field notes

The species was first documented during Captain Beechey's 1827 expedition but vanished by the 1830s due to introduced predators.
Though originally placed in its own genus, Chaunoproctus, modern genetic analysis reclassified it as a giant, divergent rosefinch.
Early naturalists observed that the bird was notably tame and primarily foraged on the ground or in low-lying shrubbery.
The specific epithet 'ferreorostris' translates to 'iron beak,' referring to the heavy, crushing strength of its mandibles used for seeds and fruits.
Only ten museum specimens exist globally, most of which were collected on the island of Chichi-jima.

Habitat

Subtropical forest and coastal shrublands

Range

Chichi-jima, Bonin Islands (Ogasawara Islands), Japan

Similar & commonly confused birds

Blyth's RosefinchCarpodacus grandis Chinese Beautiful RosefinchCarpodacus davidianus Chinese White-browed RosefinchCarpodacus dubius Common RosefinchCarpodacus erythrinus Crimson-browed FinchCarpodacus subhimachalus Dark-rumped RosefinchCarpodacus edwardsii Great RosefinchCarpodacus rubicilla Himalayan Beautiful RosefinchCarpodacus pulcherrimus

Heard a Bonin Grosbeak?

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