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

Bermuda Petrel

Pterodroma cahow

The Bermuda Petrel, or Cahow, is a critically endangered gadfly petrel and a 'Lazarus taxon' famously rediscovered in 1951 after being thought extinct for 330 years.

What it sounds like

Eerie, mournful, high-pitched moans and 'oo-oo' vocalizations primarily heard at night during aerial courtship.

Reference call, compare with what you heard

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Rec. Robert L. Flood · United KingdomCC BY-NC-SA Xeno-canto

Field notes

It is the national bird of Bermuda and remains one of the rarest seabirds in the world.
Pairs are strictly monogamous and return to the same nesting burrow year after year.
The species spends most of its life at sea, returning to land only at night to breed to avoid avian predators.
Intensive conservation efforts include the construction of hurricane-proof artificial concrete nesting 'bunkers'.
Fledglings spend their first three to five years entirely at sea before returning to their natal colony to find a mate.

Habitat

Pelagic open ocean during non-breeding; nests in subterranean limestone burrows on offshore islets.

Range

Endemic to Bermuda for breeding; ranges widely across the North Atlantic following the Gulf Stream.

Similar & commonly confused birds

Atlantic PetrelPterodroma incerta Barau's PetrelPterodroma baraui Black-capped PetrelPterodroma hasitata Black-winged PetrelPterodroma nigripennis Bonin PetrelPterodroma hypoleuca Cape Verde PetrelPterodroma feae Chatham Islands PetrelPterodroma axillaris Collared PetrelPterodroma brevipes

Heard a Bermuda Petrel?

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