Source : Webster's Revised Unabridged Dictionary (1913)

Yaffle \Yaf"fle\, n. [Probably imitative of its call or cry.]
   (Zo["o]l.)
   The European green woodpecker ({Picus, or Genius, viridis}).
   It is noted for its loud laughlike note. Called also {eccle},
   {hewhole}, {highhoe}, {laughing bird}, {popinjay}, {rain
   bird}, {yaffil}, {yaffler}, {yaffingale}, {yappingale},
   {yackel}, and {woodhack}.