Galeoscoptes Carolinensis

from The Collaborative International Dictionary of English v.0.48

Catbird \Cat"bird\, n. (Zool.)
   An American bird ({Galeoscoptes Carolinensis}), allied to the
   mocking bird, and like it capable of imitating the notes of
   other birds, but less perfectly. Its note resembles at times
   the mewing of a cat.
   [1913 Webster]