Source : Webster's Revised Unabridged Dictionary (1913)

Chough \Chough\, n. [OE. choughe, kowe (and cf. OE. ca), fr. AS.
   ce['o]; cf. also D. kauw, OHG. ch[=a]ha; perh. akin to E.
   caw. [root]22. Cf. {Caddow}.] (Zo["o]l.)
   A bird of the Crow family ({Fregilus graculus}) of Europe. It
   is of a black color, with a long, slender, curved bill and
   red legs; -- also called {chauk}, {chauk-daw}, {chocard},
   {Cornish chough}, {red-legged crow}. The name is also applied
   to several allied birds, as the {Alpine chough}.

   {Cornish chough} (Her.), a bird represented black, with red
      feet, and beak; -- called also {aylet} and {sea swallow}.

Source : WordNet®

chough
     n : a European corvine bird of small or medium size with red
         legs and glossy black plumage