Source : Webster's Revised Unabridged Dictionary (1913)

Redwing \Red"wing`\ (-w?ng`), n. (Zo["o]l.)
   A European thrush ({Turdus iliacus}). Its under wing coverts
   are orange red. Called also {redwinged thrush}.
   (b) A North American passerine bird ({Agelarius
       ph[oe]niceus}) of the family {Icterid[ae]}. The male is
       black, with a conspicuous patch of bright red, bordered
       with orange, on each wing. Called also {redwinged
       blackbird}, {red-winged troupial}, {marsh blackbird}, and
       {swamp blackbird}.

Source : WordNet®

redwing
     n 1: North American blackbird with scarlet patches on the wings
          [syn: {red-winged blackbird}, {Agelaius phoeniceus}]
     2: small European thrush having reddish flanks [syn: {Turdus
        iliacus}]