scaup
Concise Oxford English Dictionary © 2008 Oxford University Press:
scaup /skɔːp/
▶noun a diving duck, the male of which has a black head with a green or purple gloss. [Aythya marila and related species.]
– origin C17: Scots var. of Scots and northern English scalp ‘mussel bed’, a feeding ground of the duck.
'scaup' also found in these Oxford entries:
