scaup \scaup\ skaddp, n. see scalp a bed of oysters or
   mussels.
   1. a bed or stratum of shellfish; scalp. scot.
      1913 webster

   2. zool. a scaup duck. see below.
      1913 webster

   scaup duck zool., 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 aythya affinis, called
      also little bluebill, river broadbill, and shuffler;
      the tufted, or ring-necked, scaup duck aythya
      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 aythya marila, closely
      resembles the american variety.
      1913 webster
see also:
scalp scaup duck aythya fuligula aythya marila broadbill 
bluebill blackhead flock duck flocking fowl raft duck 
aythya affinis little bluebill river broadbill shuffler aythya collaris 
black jack ringneck ringbill ringbill shuffler ring-necked duck 
ring-necked 

bluebill \blue"bill`\, n. zool.
   a duck of the genus fuligula. two american species
   fuligula marila and fuligula affinis are common. see
   scaup duck.
   1913 webster
see also:
fuligula fuligula marila fuligula affinis scaup duck 

broadbill \broad"bill`\, n.
   1. zool. a wild duck aythya marila, or fuligula
      marila, which appears in large numbers on the eastern
      coast of the united states, in autumn; -- called also
      bluebill, blackhead, raft duck, and scaup duck.
      see scaup duck.
      1913 webster

   2. zool. the shoveler. see shoveler.
      1913 webster
see also:
aythya marila fuligula marila bluebill blackhead raft duck scaup duck 
scaup duck shoveler 

bluebill
     n : diving ducks of north america having a bluish-gray bill
         syn: scaup, scaup duck, broadbill
see also:
scaup scaup duck broadbill