Whooper Swan

Cygnus cygnus

The whooper swan, is a large northern hemisphere swan. It is the Eurasian counterpart of the North American trumpeter swan. Source

Where it is now

In the last 8 weeks this bird was recorded 35,513 times across 52 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 16°C (typically 10 to 20°C, from 12 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 51°N in October to 64°N in June, about 1,500 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.