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

Chatham Islands Petrel

Pterodroma axillaris

The Chatham Islands Petrel, also known as the Rangatira Petrel, is a rare, medium-sized gadfly petrel endemic to New Zealand, recognized by its distinctive dark underwing markings.

What it sounds like

High-pitched, repetitive 'ti-ti-ti' whistles and soft squeaks emitted during nocturnal flights over colonies.

Reference call, compare with what you heard

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Rec. David Boyle · New ZealandCC BY-NC-SA Xeno-canto

Field notes

It was once reduced to a single breeding population on South East Island (Rangatira) due to extreme competition for burrows.
The species is identified by a bold, black diagonal bar on the white underwing extending from the carpal joint to the body.
Broad-billed Prions are its primary competitors and have historically killed petrel chicks to seize nesting sites.
Conservationists developed specialized 'burrow flaps' to allow petrels entry while excluding larger competing prions.
It is a highly pelagic species that spends the majority of its life at sea, returning to land only under the cover of darkness.

Habitat

Nests in burrows within coastal broadleaf forests and scrub; pelagic when not breeding.

Range

Endemic to the Chatham Islands, New Zealand, with foraging ranges across the South Pacific.

Similar & commonly confused birds

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

Heard a Chatham Islands Petrel?

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