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

Acre Antshrike

Thamnophilus divisorius

A recently discovered thamnophilid specialist restricted to remote, stunted forests along the sandstone ridges of the Brazil-Peru border.

What it sounds like

An accelerating series of nasal 'ank' notes that rise slightly in pitch, often ending with a distinct terminal flourish.

Reference call, compare with what you heard

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Rec. Marco Cruz · BrazilCC BY-NC-SA Xeno-canto

Field notes

Discovered by scientists in 1996 and formally described in 2004, it is one of the more recent additions to the Thamnophilus genus.
The species exhibits strong sexual dimorphism: males are uniform lead-gray, while females possess a striking rufous belly and breast.
It is an ecological specialist, found exclusively in 'campinarana'—low-stature, nutrient-poor woodland growing on white-sand soils.
Its specific epithet 'divisorius' refers to the Serra do Divisor, the mountain range where the type specimen was first collected.
Despite being an antshrike, it is not known to be a regular follower of army ant swarms, typically foraging in pairs within the sub-canopy.

Habitat

Stunted, mossy, nutrient-poor woodland (campinarana) on elevated sandstone ridges.

Range

The Serra do Divisor in western Brazil and the Contamana Mountains in eastern Peru.

Similar & commonly confused birds

Amazonian AntshrikeThamnophilus amazonicus Band-tailed AntshrikeThamnophilus melanothorax Bar-crested AntshrikeThamnophilus multistriatus Barred AntshrikeThamnophilus doliatus Black AntshrikeThamnophilus nigriceps Black-backed AntshrikeThamnophilus melanonotus Black-crowned AntshrikeThamnophilus atrinucha Black-hooded AntshrikeThamnophilus bridgesi

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