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]

WordNet (r) 3.0 (2006):

goldeneye
    n 1: a variety of green lacewing [syn: goldeneye, golden-eyed
         fly]
    2: large-headed swift-flying diving duck of Arctic regions [syn:
       goldeneye, whistler, Bucephela clangula]