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About from Wikipedia
Description
Adult males range from 45–51 cm (18–20 in) and weigh approximately 1,000 g (2.2 lb), while females range from 40–50 cm (16–20 in) and weigh approximately 800 g (1.8 lb). The common goldeneye has a wingspan of 77–83 cm (30.5–32.5 in). The species is named for its golden-yellow eyes. Adult males have a dark head with a greenish gloss and a circular white patch below the eye, a dark back and a white neck and belly. Adult females have a brown head and a mostly grey body. Their legs and feet are orange-yellow. The subspecies B. c. americana has a longer and thicker bill than the nominate B. c. clangula.
Range & habitat
Their breeding habitat is the taiga. They are found in the lakes and rivers of boreal forests across Canada and the northern United States, Scotland, Scandinavia, the Baltic States, and northern Russia. They are migratory and most winter in protected coastal waters or open inland waters at more temperate latitudes. Naturally, they nest in cavities in large trees, where they return year after year, though they will readily use nest boxes as well.
Adapted from Common goldeneye on Wikipedia, used under CC BY-SA 4.0.