n. 秋沙鸭

[ noun ]
large crested fish-eating diving duck having a slender hooked bill with serrated edges
<noun.animal>

Merganser \Mer*gan"ser\, n. [Sp. merg['a]nsar, fr. mergo a diver
(L. mergus, fr. mergere to dip, dive) + ['a]nsar goose, L.
anser.] (Zo["o]l.)
Any bird of the genus {Mergus} ({Merganser}), and allied
genera of the subfamily Merginae. They are allied to the
ducks, but have a sharply serrated bill, eat fish, and dive
for food. Also called {fish duck}.
[1913 Webster +PJC]

Note: The red-breasted merganser ({Merganser serrator})
inhabits both hemispheres. It is called also {sawbill},
{harle}, and {sheldrake}. The American merganser
({Merganser Americanus}.) and the hooded merganser
({Lophodytes cucullatus}) are well-known species.

{White merganser}, the smew or white nun.

Goosander \Goos"an`der\, n. [OE. gossander, a tautological word
formed fr. goose + gander. Cf. {Merganser}.] (Zo["o]l.)
A species of merganser ({M. merganser}) of Northern Europe
and America; -- called also {merganser}, {dundiver},
{sawbill}, {sawneb}, {shelduck}, and {sheldrake}. See
{Merganser}.