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

Small St. Helena Petrel

Bulweria bifax

An extinct species of gadfly petrel that was once endemic to the island of Saint Helena, known primarily through subfossil remains.

What it sounds like

Unknown; no historical records of its vocalizations exist due to its early extinction.

Reference call, compare with what you heard

No reference call found yet · Xeno-canto

Field notes

The species name 'bifax' means 'two-faced,' referring to its morphological position between the Bulwer's Petrel and Jouanin's Petrel.
It likely became extinct shortly after the discovery of Saint Helena in 1502 due to predation by introduced black rats.
The bird was identified as a distinct species in 1975 by American ornithologist Storrs Olson using subfossil deposits.
It coexisted with several other endemic seabirds on the island, including the now-extinct Large Saint Helena Petrel.
Analysis of its remains suggests it was intermediate in size compared to other members of the genus Bulweria.

Habitat

Pelagic waters for foraging and volcanic island cliffs or burrows for nesting.

Range

Saint Helena Island, South Atlantic Ocean.

Similar & commonly confused birds

Bulwer's PetrelBulweria bulwerii Jouanin's PetrelBulweria fallax

Heard a Small St. Helena Petrel?

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