The Collaborative International Dictionary of English v.0.48:

Whinchat \Whin"chat`\, n. [So called because it frequents
   whins.] (Zool.)
   A small warbler (Pratincola rubetra) common in Europe; --
   called also whinchacker, whincheck, whin-clocharet.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Chat \Chat\, n.
   1. Light, familiar talk; conversation; gossip.
      [1913 Webster]

            Snuff, or fan, supply each pause of chat,
            With singing, laughing, ogling, and all that.
                                                  --Pope.
      [1913 Webster]

   2. (Zool.) A bird of the genus Icteria, allied to the
      warblers, in America. The best known species are the
      yellow-breasted chat (Icteria viridis), and the
      long-tailed chat (Icteria longicauda). In Europe the
      name is given to several birds of the family
      Saxicolid[ae], as the stonechat, and whinchat.
      [1913 Webster]

   Bush chat. (Zool.) See under Bush.
      [1913 Webster]

WordNet (r) 3.0 (2006):

whinchat
    n 1: brown-and-buff European songbird of grassy meadows [syn:
         whinchat, Saxicola rubetra]