
1) Bay duck 2) Bluebill 3) Broadbill 4) Canvasback relative 5) Cousin of a mallard 6) Diving duck 7) Duck 8) Duck related to the redhead 9) Duck that dives 10) Relative of the canvasback 11) Scaup duck 12) Well known bird 13) Wild duck
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https://www.crosswordclues.com/clue/scaup

1) Bluebill
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• (n.) A scaup duck. See below. • (n.) A bed or stratum of shellfish; scalp.
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http://thinkexist.com/dictionary/meaning/scaup/

(genus Aythya), any of three species of diving ducks (family Anatidae). The greater scaup (A. marila), also called the big bluebill, breeds across ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/s/40

1. A bed or stratum of shellfish; scalp. ... 2. <zoology> A scaup duck. See below. ... <zoology> Scaup duck, 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), ... Synonym: ...
Found on
http://www.encyclo.co.uk/local/20973
Scaup (skap)
noun [ See
Scalp a bed of oysters or mussels.]
1. A bed or stratum of shellfish; scalp. [ Scot.]
2. (Zoology) A scaup duck. See below.
Scaup duck (Zoology) ,
any one of several species of northern ducks of the genus Aythya , or ...
Found on http://www.encyclo.co.uk/webster/S/28
The Scaup (Aythya marila) is a migrant duck, visiting Britain in winter. They appear similar to the tufted duck, but the larger male lacks a crest on its head, has a dark breast, white belly and flanks, grey back and a black stern. The female is brown with a conspicuous white face patch.
Found on http://www.probertencyclopaedia.com/browse/BS.HTM
[n] - diving ducks of North America having a bluish-gray bill
Found on http://www.webdictionary.co.uk/definition.php?query=scaup
scaup duck noun diving ducks of North America having a bluish-grey bill
Found on https://www.encyclo.co.uk/local/20974
No exact match found.