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

Wood Warbler

Phylloscopus sibilatrix

The Wood Warbler is a large, brightly colored leaf warbler distinguished by its lemon-yellow throat and breast contrasting sharply with a silk-white belly. It is a specialized long-distance migrant that breeds in the high canopies of mature deciduous forests.

What it sounds like

A rapid, shivering 'spt-spt-spt-st-st-st-tt-tt-trrrr' trill and a separate, plaintive, piping 'piuu' whistle.

Reference call, compare with what you heard

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Rec. Louis-Marie Gourmelon · SwedenCC BY-NC-SA Xeno-canto

Field notes

Its primary song is a unique, accelerating metallic trill that sounds like a spinning coin vibrating to a standstill on a hard surface.
Unlike many other warblers, it builds a domed 'oven' nest on the ground, expertly camouflaged within the leaf litter and lined with hair but never feathers.
It possesses longer wings relative to its body size than most other Phylloscopus warblers, an adaptation for its arduous migration to sub-Saharan Africa.
The species is highly sensitive to forest structure, preferring a high, closed canopy with minimal understory vegetation for clear flight paths.
While most leaf warblers are drab, the Wood Warbler is notably vibrant with moss-green upperparts and a distinct sulfur-yellow supercilium (eyebrow).

Habitat

Mature deciduous woodlands, particularly beech and oak forests with sparse ground cover.

Range

Breeds across northern and temperate Europe and western Siberia; winters in tropical central and western Africa.

Similar & commonly confused birds

Alström's WarblerPhylloscopus soror Arctic WarblerPhylloscopus borealis Ashy-throated WarblerPhylloscopus maculipennis Biak Leaf WarblerPhylloscopus misoriensis Bianchi's WarblerPhylloscopus valentini Black-capped Woodland-WarblerPhylloscopus herberti Blyth's Leaf WarblerPhylloscopus reguloides Brooks's Leaf WarblerPhylloscopus subviridis

Heard a Wood Warbler?

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