Common Goldeneye

Bucephala clangula

The common goldeneye or simply goldeneye is a medium-sized sea duck of the genus Bucephala, the goldeneyes. Its closest relative is the similar Barrow's goldeneye. The genus name is derived from the Ancient Greek boukephalos, a reference to the bulbous head shape of the bufflehead. The species name is derived from the Latin clangere. Source

Where it is now

In the last 8 weeks this bird was recorded 37,689 times across 95 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 12°C (typically 5 to 17°C, from 15 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 40°N in December to 57°N in May, about 1,900 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.