The Collaborative International Dictionary of English v.0.48:

Ringdove \Ring"dove`\, n. (Zool.)
   A European wild pigeon (Columba palumbus) having a white
   crescent on each side of the neck, whence the name. Called
   also wood pigeon, and cushat.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cushat \Cush"at\ (k??sh"?t), n. [AS. cusceote.] (Zool.)
   The ringdove or wood pigeon.
   [1913 Webster]

         Scarce with cushat's homely song can vie. --Sir W.
                                                  Scott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cushat
    n 1: Eurasian pigeon with white patches on wings and neck [syn:
         wood pigeon, ringdove, cushat, Columba palumbus]