The Collaborative International Dictionary of English v.0.48:

Stonechat \Stone"chat`\, n. [Stone + chat.] [So called from the
   similarity of its alarm note to the clicking together of two
   pebbles.] (Zool.)
   (a) A small, active, and very common European singing bird
       (Pratincola rubicola); -- called also chickstone,
       stonechacker, stonechatter, stoneclink,
       stonesmith.
   (b) The wheatear.
   (c) The blue titmouse.
       [1913 Webster]

   Note: The name is sometimes applied to various species of
         Saxicola, Pratincola, and allied genera; as, the
         pied stonechat of India (Saxicola picata).
         [1913 Webster]