Ri·fle·bird n. Zool. 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.

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