smew

A small Eurasian diving duck (Mergellus albellus), the male of which has white and black plumage and a white crest.

A small merganser or fishing-duck, Mergellus albellus, the white nun, or smee, of the family Anatidæ and subfamily Merginæ, inhabiting northerly parts of the eastern hemisphere.

small European merganser (Mergus albellus) which has a white crest; — called also smee, smee duck, white merganser, and white nun.

The hooded merganser.

A small compact diving duck, Mergus albellus, that breeds in the northern taiga of Europe and Asia and winters on sheltered coasts or inland lakes.

smallest merganser and most expert diver; found in northern Eurasia