Bay-breasted Warbler

Setophaga castanea

The bay-breasted warbler is a small species of songbird in the New World warbler family, Parulidae. It is one of 35 species in the diverse genus Setophaga. Like all songbirds, or passerines, the species is classified in the order Passeriformes. Source

Where it is now

In the last 8 weeks this bird was recorded 7,056 times across 29 areas (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 18°C (typically 13 to 20°C, from 19 areas).

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.