Source : Webster's Revised Unabridged Dictionary (1913)

Wading \Wad"ing\,
   a. & n. from {Wade}, v.

   {Wading bird}. (Zo["o]l.) See {Wader}, 2.

Source : WordNet®

wading bird
     n : any of many long-legged birds that wade in water in search
         of food [syn: {wader}]