A waterfowl (Branta leucopsis) of northern Europe and Greenland that breeds in the Arctic and has a white face with a black streak between the eyes and bill. Species (Branta leucopsis) of waterbird that resembles a small Canada goose, with dark back, white face, and black neck and bib. It winters in the northern British Isles and on the coasts of Denmark, Germany, and the Netherlands. In the Middle Ages, it was thought to hatch from barnacles, and thus was considered "fish" and could be eaten on Fridays