The Collaborative International Dictionary
hickwall
Tapper \Tap"per\, n. (Zo["o]l.) The lesser spotted woodpecker ( Dendrocopus minor); -- called also tapperer, tabberer, little wood pie, barred woodpecker, wood tapper, hickwall, and pump borer. [Prov. Eng.]
Wiktionary
hickwall
n. (context UK dialect English) The lesser spotted woodpecker (''Dendrocopus minor'') of Europe.