vir·eo /ˈvɪriˌo/
 維麗俄鳥
 Vir·e·o n.  Zool. Any one of numerous species of American singing birds belonging to Vireo and allied genera of the family Vireonidae. In many of the species the back is greenish, or olive-colored.  Called also greenlet.
 Note: ☞ In the Eastern United States the most common species are the white-eyed vireo (Vireo Noveboracensis), the red-eyed vireo (Vireo olivaceus), the blue-headed, or solitary, vireo (Vireo solitarius), the warbling vireo (Vireo gilvus), and the yellow-throated vireo (Vireo flavifrons). All these are noted for the sweetness of their songs.
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 vireo
      n : any of various small insectivorous American birds chiefly
          olive-gray in color