The barnacle goose (Branta leucopsis) belongs to the genus Branta of black geese, which contains species with largely black plumage, distinguishing them from the grey Anser species. The barnacle goose is a medium-sized goose, 55–70 cm (22–28 in) long, with a wingspan of 130–145 cm (51–57 in) and a body mass of 1.21–2.23 kg (2.7–4.9 lb). It has a white face and black head, neck, and upper breast. Its belly is white. The wings and its back are silver-gray with black-and-white bars that look like they are shining when the light reflects on it. During flight a V-shaped white rump patch and the silver-gray underwing linings are visible.
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