bucephela clangula

English Thesaurus

1. large-headed swift-flying diving duck of Arctic regions (noun.animal)

hypernym	:	duck,
definition	:	small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs (noun.animal)

hyponym	:	barrow's goldeneye, bucephala islandica,
definition	:	North American goldeneye diving duck (noun.animal)

member meronym	:	bucephala, genus bucephala,
definition	:	buffleheads and goldeneyes (noun.animal)