Aix galericulata

from WordNet (r) 3.0 (2006)

Aix galericulata
    n 1: showy crested Asiatic duck; often domesticated [syn:
         {mandarin duck}, {Aix galericulata}]

from The Collaborative International Dictionary of English v.0.48

mandarin duck \mandarin duck\ n.
   A showy crested Asiatic duck ({Aix galericulata}, formerly
   {Dendronessa galericulata}), often domesticated, and regarded
   by the Chinese as an emblem of conjugal affection.
   [1913 Webster + WordNet 1.5]