Northern Parula

Setophaga americana

The northern parula is a small New World warbler. It is migratory and breeds in eastern North America from southern Canada to Florida. Source

Where it is now

In the last 8 weeks this bird was recorded 6,707 times across 27 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 20°C (typically 13 to 25°C, from 29 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 March to 45°N in July, about 2,000 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.