The surf scoter (Melanitta perspicillata) is a large sea duck, which breeds in Canada and Alaska. It is placed in the subgenus Melanitta, along with the velvet and white-winged scoters, distinct from the subgenus Oidemia, black and common scoters.
It winters farther south in temperate zones, on the coasts of the northern United States. Small numbers regularly winter in western Europe as far south as the British Isles. Some birds may over-winter on the Great Lakes. It forms large flocks on suitable coastal waters. These are tightly packed, and the birds tend to take off together.
The lined nest is built on the ground close to the sea, lakes or rivers, in woodland or tundra. 5–9 eggs are laid. An egg may range from 55–79 g (1.9–2.8 oz) and average 43.9 mm (1.73 in) in breadth and 62.4 mm (2.46 in) in length. Occasional (and likely accidental) brood mixing between different females occurs in areas with high densities of nests. Growth is relatively rapid and the incubation period is about 28 to 30 days. The offspring will fledge independently at about 55 days. source