Source : Webster's Revised Unabridged Dictionary (1913)

Riflebird \Ri"fle*bird`\, n. (Zo["o]l.)
   Any one of several species of beautiful birds of Australia
   and New Guinea, of the genera {Ptiloris} and {Craspidophora},
   allied to the paradise birds.

   Note: The largest and best known species is {Ptiloris
         paradisea} of Australia. Its general color is rich
         velvety brown, glossed with lilac; the under parts are
         varied with rich olive green, and the head, throat, and
         two middle tail feathers are brilliant metallic green.

Source : WordNet®

riflebird
     n : velvety black Australian bird of paradise with green and
         purple iridescence on head and tail [syn: {Ptloris
         paradisea}]