MERGANSER
merganser, fish duck, sawbill, sheldrake
(noun) large crested fish-eating diving duck having a slender hooked bill with serrated edges
Source: WordNet® 3.1
Etymology
Noun
merganser (plural mergansers)
Any of various diving ducks of the genera Mergus or Lophodytes, which feed on fish and have a sharply serrated bill.
Synonyms
• (Eurasian) goosander, Mergus merganser
Source: Wiktionary
Mer*gan"ser, n. Etym: [Sp. mergánsar, fr. mergo a diver (L. mergus,
fr. mergere to dip, dive) + ánsar goose, L. anser.] (Zoöl.)
Definition: Any bird of the genus Merganser, and allied genera. They are
allied to the ducks, but have a sharply serrated bill.
Note: The red-breasted merganser (Merganser serrator) inhabits both
hemispheres. It is called also sawbill, harle, and sheldrake. The
American merganser (M. Americanus.) and the hooded merganser
(Lophodytes cucullatus) are well-known species.
– White merganser, the smew or white nun.
Source: Webster’s Unabridged Dictionary 1913 Edition