vesper sparrow

from WordNet (r) 3.0 (2006)

vesper sparrow
    n 1: common North American finch noted for its evening song
         [syn: {vesper sparrow}, {grass finch}, {Pooecetes
         gramineus}]

from The Collaborative International Dictionary of English v.0.48

Vesper \Ves"per\, a.
   Of or pertaining to the evening, or to the service of
   vespers; as, a vesper hymn; vesper bells.
   [1913 Webster]

   {Vesper sparrow}, the grass finch. See under {Grass}.
      [1913 Webster]