The Collaborative International Dictionary of English v.0.48:

Tapper \Tap"per\, n. (Zool.)
   The lesser spotted woodpecker (Dendrocopus minor); --
   called also tapperer, tabberer, little wood pie,
   barred woodpecker, wood tapper, hickwall, and pump
   borer. [Prov. Eng.]
   [1913 Webster]