The Collaborative International Dictionary of English v.0.48:

Gossat \Gos"sat\, n. (Zool.)
   A small British marine fish (Motella tricirrata); -- called
   also whistler and three-bearded rockling. [Prov. Eng.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Golden-eye \Gold"en-eye`\ (g[=o]ld"'n*[imac]), n. (Zool.)
   A duck (Glaucionetta clangula), found in Northern Europe,
   Asia, and America. The American variety (var. Americana) is
   larger. Called whistler, garrot, gowdy, pied widgeon,
   whiteside, curre, and doucker. Barrow's golden-eye of
   America (Glaucionetta Islandica) is less common.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Whistlefish \Whis"tle*fish`\, n. (Zool.)
   A gossat, or rockling; -- called also whistler,
   three-bearded rockling, sea loach, and sorghe.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Whistler \Whis"tler\, n. [AS. hwistlere.]
   [1913 Webster]
   1. One who, or that which, whistles, or produces or a
      whistling sound.
      [1913 Webster]

   2. (Zool.)
      (a) The ring ousel.
      (b) The widgeon. [Prov. Eng.]
      (c) The golden-eye.
      (d) The golden plover and the gray plover.
          [1913 Webster]

   3. (Zool.) The hoary, or northern, marmot (Arctomys
      pruinosus).
      [1913 Webster]

   4. (Zool.) The whistlefish.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Whistler
    n 1: United States painter (1834-1903) [syn: Whistler, James
         Abbott McNeill Whistler]
    2: someone who makes a loud high sound
    3: large North American mountain marmot [syn: hoary marmot,
       whistler, whistling marmot, Marmota caligata]
    4: large-headed swift-flying diving duck of Arctic regions [syn:
       goldeneye, whistler, Bucephela clangula]
    5: Australian and southeastern Asian birds with a melodious
       whistling call [syn: thickhead, whistler]