Townsend's Warbler

Setophaga townsendi

Townsend's warbler is a small songbird of the New World warbler family. Source

Where it is now

In the last 8 weeks this bird was recorded 79,398 times across 31 areas (each area is a 5 degree square).

See the Townsend's Warbler on the live map

Movement and weather

Each season it is first heard regularly where daytime highs are around 18°C (typically 9 to 24°C, from 21 areas). That range is wide, so temperature alone does not explain when it turns up.

Over the weeks it was present in the past year, its centre in North America ranged from 27°N in November to 58°N in June, about 3,500 km apart.

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.