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The greater scaup (Aythya marila), just scaup in Europe or, colloquially, "bluebill" in North America, [3] is a mid-sized diving duck, larger than the closely related lesser scaup and tufted duck. It spends the summer months breeding in Iceland , east across Scandinavia , northern Russia and Siberia , Alaska , and northern Canada .
These are gregarious ducks, mainly found on fresh water or on estuaries, though the greater scaup becomes marine during the northern winter. They are strong fliers; their broad, blunt-tipped wings require faster wing-beats than those of many ducks and they take off with some difficulty.
Greater scaup: Iceland, Northern Europe, Northern Asia except the Far East (A. m. marila); far northeastern Asia, Alaska, northern Canada (A. m. nearctica) least concern A. affinis: Lesser scaup: Alaska through western Canada to western Montana, wintering east to the Atlantic Coast and south to Central America; occasional visitor to Western Europe
Scaup is the common name for three species of diving duck: Greater scaup, or just "scaup", Aythya marila; Lesser scaup, Aythya affinis;
Most of the ducks are migratory, arriving in late April to early May from north-western Europe. The commonest species at the lake is the tufted duck with 6,000 pairs present, whilst the second most abundant species is the greater scaup with 1,500 pairs.
Greater scaup, Aythya marila (A) Lesser scaup, Aythya affinis; Hooded merganser, Lophodytes cucullatus (A) Red-breasted merganser, Mergus serrator (A) Masked duck, Nomonyx dominicus; Ruddy duck, Oxyura jamaicensis
Richard Charles Banks (April 19, 1931 – October 24, 2021) was an American author, ornithologist and Emeritus Research Zoologist on staff with the Patuxent Wildlife Research Center run by the U.S. Geological Survey and stationed at the Smithsonian Institution in Washington, D.C.
As more research is gathered from studies of distribution, ... Greater white-fronted goose, ... Greater scaup, Aythya marila; Lesser scaup, ...