The Collaborative International Dictionary of English v.0.48:

Stockdove \Stock"dove`\, n. (Zool.)
   A common European wild pigeon (Columba aenas), so called
   because at one time believed to be the stock of the domestic
   pigeon, or, according to some, from its breeding in the
   stocks, or trunks, of trees.
   [1913 Webster]

   Note: The name is applied, also, to other related species, as
         the Indian stockdove (Palumbaena Eversmanni).
         [1913 Webster]