Common Chiffchaff

Phylloscopus collybita

The common chiffchaff, or simply the chiffchaff, is a common and widespread leaf warbler which breeds in open woodlands throughout northern and temperate Europe and the Palearctic. Source

Where it is now

In the last 8 weeks this bird was recorded 3,316,435 times across 77 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 13°C (typically 10 to 21°C, from 33 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 Europe ranged from 39°N in December to 59°N in June, about 2,200 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.