scaup
/skɔːp/noun
1- a Eurasian, North American, and New Zealand diving duck, the male of which has a black head with a green or purple gloss（分布于欧亚大陆、北美洲和新西兰的）斑背潜鸭。
1.1
- Genus Aythya, family Anatidae: three species, in particular the widespread (greater) scaup (A. marila), with a black breast and white sides.潜鸭属, 鸭科：3种, 尤指分布广泛的斑背潜鸭（拉丁名A. marila）。
词源
late 17th cent.: Scots variant of Scots and northern English scalp 'mussel-bed', a feeding ground of the duck.