Sawbill

from WordNet (r) 3.0 (2006)

sawbill
    n 1: large crested fish-eating diving duck having a slender
         hooked bill with serrated edges [syn: {merganser}, {fish
         duck}, {sawbill}, {sheldrake}]

from The Collaborative International Dictionary of English v.0.48

Goosander \Goos"an`der\, n. [OE. gossander, a tautological word
   formed fr. goose + gander. Cf. {Merganser}.] (Zool.)
   A species of merganser ({M. merganser}) of Northern Europe
   and America; -- called also {merganser}, {dundiver},
   {sawbill}, {sawneb}, {shelduck}, and {sheldrake}. See
   {Merganser}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Sawbill \Saw"bill`\, n.
   The merganser. [Prov. Eng.]
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

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.] (Zool.)
   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.
      [1913 Webster]