The Collaborative International Dictionary of English v.0.48:

Dickey \Dick"ey\, Dicky \Dick"y\, n.
   1.

   1. A false detachable shirt front or bosom. [Also spelled
      dickie.]
      [1913 Webster]

   2. A gentleman's shirt collar. [Local, U. S.]
      [1913 Webster]

   3. A hat; esp., in U. S., a stiff hat or derby; in Eng., a
      straw hat. [Slang]
      [Webster 1913 Suppl.]

   4.
      (a) A seat for the driver (In a carriage); -- called also
          dickey box or dickie seat.
      (b) A seat at the back for servants.
          [Webster 1913 Suppl.]

   5. One of various animals; specif.:
      (a) A donkey.
      (b) Any small bird; -- called also dickeybird or dickey
          bird. [Colloq.]
      (c) The hedge sparrow. [Dial. Eng.]
      (d) The haddock.
          [Webster 1913 Suppl.] dickeybird

The Collaborative International Dictionary of English v.0.48:

dickeybird \dickeybird\, dickey bird \dickey bird\n.
   Any small bird; as, adults talking to children sometimes call
   small birds dickeybirds. [informal]

   Syn: dickybird.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

dickey-bird
    n 1: small bird; adults talking to children sometimes use these
         words to refer to small birds [syn: dickeybird, dickey-
         bird, dickybird, dicky-bird]