The Collaborative International Dictionary of English v.0.48:

Sora \So"ra\, n. (Zool.)
   A North American rail (Porzana Carolina) common in the
   Eastern United States. Its back is golden brown, varied with
   black and white, the front of the head and throat black, the
   breast and sides of the head and neck slate-colored. Called
   also American rail, Carolina rail, Carolina crake,
   common rail, sora rail, soree, meadow chicken, and
   orto.
   [1913 Webster]

   King sora, the Florida gallinule.
      [1913 Webster]