lesser scaup duck小斑背潜鸭
aythya marila scaup duck斑背潜鸭
N（名词） either of two diving ducks, Aythya marila (greater scaup) or A. affinis (lesser scaup), of Europe and America, having a black-and-white plumage in the male 斑背潜鸭 (Also called (US) bluebill, broadbill)