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noun
Diving ducks of North America having a bluish-grey bill.
synonyms: bluebill, broadbill, scaup.
is a specific kind of: duck.
is a broader term that covers: Aythya marila, greater scaup | Aythya affinis, lake duck, lesser scaup, lesser scaup duck.
is a member of: Aythya, genus Aythya.
Dutch: topper
Find more on scaup duck elsewhere: etymology - rhymes - Wikipedia.
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