scaup

Either of two diving ducks (Aythya marila or A. affinis) of the Northern Hemisphere, the male of which has gray, black, and white plumage.

A small diving duck (Aythya novaeseelandiae) of New Zealand, having dark plumage.

A duck, Fuligula or Fulix marila and related species.

A bed or stratum of shellfish; scalp.

A scaup duck. See below.

any one of several species of northern ducks of the genus Aythya, or Fuligula. The adult males are, in large part, black. The three North American species are: the greater scaup duck (Aythya marila, var. nearctica), called also broadbill, bluebill, blackhead, flock duck, flocking fowl, and raft duck; the lesser scaup duck (A. affinis), called also little bluebill, river broadbill, and shuffler; the tufted, or ring-necked, scaup duck (A. collaris), called also black jack, ringneck, ringbill, ringbill shuffler, etc. See Illust. of Ring-necked duck, under Ring-necked. The common European scaup, or mussel, duck (A. marila), closely resembles the American variety.

Any of three species of small diving duck in the genus Aythya.

Alternative form of scalp; a bed or stratum of shellfish.

diving ducks of North America having a bluish-grey bill