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

White-bellied Storm-Petrel

Fregetta grallaria

A small, pelagic seabird of the southern oceans, characterized by its striking white underparts and energetic 'bouncing' flight over waves.

What it sounds like

Generally silent at sea; at nesting sites, it produces soft, high-pitched whistles and repetitive metallic piping notes.

Reference call, compare with what you heard

No reference call found yet · Xeno-canto

Field notes

Its species name, grallaria, means 'stilt-walker,' referring to its unusually long legs used to push off the water's surface.
The species is polymorphic, with rare dark-morph individuals displaying entirely sooty underparts instead of the typical white.
It employs a 'pattering' flight, skipping across the ocean surface to snatch small squid, fish, and crustaceans.
It breeds in remote colonies on subtropical and subantarctic islands, nesting in rock crevices or self-excavated burrows.
Unlike the similar Black-bellied Storm-Petrel, it typically lacks a dark central line running down the middle of the abdomen.

Habitat

Pelagic and marine; exclusively open ocean except during the breeding season.

Range

Widespread throughout the Southern Hemisphere's subtropical and subantarctic waters, including the South Atlantic, Indian, and Pacific Oceans.

Similar & commonly confused birds

Black-bellied Storm-PetrelFregetta tropica New Caledonian Storm-PetrelFregetta lineata New Zealand Storm-PetrelFregetta maoriana

Heard a White-bellied Storm-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