British Wildlife Wiki

Scaup -

The Scaup (Aythya marila),is a small diving duck. It breeds on the ground by lakes and bogs on the tundra and at the northern limits of the boreal forest across Arctic and subarctic regions of northern North America, Europe and Asia.

The adult Scaup is 42–51 cm long with a 71–80 cm wingspan. It has a blue bill and yellow eyes. The male has a dark head with a green sheen, a black breast, a light back, a black tail and a white bottom. The adult female has a white band at the base of the bill and a brown head and body.

Scaup migrate southwards to winter in flocks to coastal waters.

The Greater Scaup mainly eats mollusks and aquatic plants, obtained by diving and swimming underwater. There is a report of four Scaups swallowing frogs (with body length about 5 cm (2 inches)) which they dredged out of a roadside freshwater pond.

The Scaup's name may come from "scalp", a Scottish and Northern English word for a shellfish bed ("probably" the same word as the scalp of the head),[1]or from the duck's display call scaup scaup. It is usually silent when not breeding.

The Greater Scaup is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.