Source : Webster's Revised Unabridged Dictionary (1913)

Quesal \Que*sal"\, n. (Zo["o]l.)
   The long-tailed, or resplendent, trogon ({Pharomachus
   mocinno}, formerly {Trogon resplendens}), native of Southern
   Mexico and Central America. Called also {quetzal}, and
   {golden trogon}.

   Note: The male is remarkable for the brilliant metallic green
         and gold colors of his plumage, and for his extremely
         long plumes, which often exceed three feet in length.