Harporhynchus rufus

from The Collaborative International Dictionary of English v.0.48

Mocking \Mock"ing\, a.
   Imitating, esp. in derision, or so as to cause derision;
   mimicking; derisive.
   [1913 Webster]

   {Mocking thrush} (Zool.), any species of the genus
      {Harporhynchus}, as the brown thrush ({Harporhynchus
      rufus}).

   {Mocking wren} (Zool.), any American wren of the genus
      {Thryothorus}, esp. {Thryothorus Ludovicianus}.
      [1913 Webster] mockingbird

from The Collaborative International Dictionary of English v.0.48

Brown thrush \Brown" thrush"\ (Zool.)
   A common American singing bird ({Harporhynchus rufus}),
   allied to the mocking bird; -- also called {brown thrasher}.
   [1913 Webster]