The Collaborative International Dictionary of English v.0.48:

Kaka \Ka"ka\, n. [Maori kaka a parrot; -- so named from its
   note.] (Zool.)
   A New Zealand parrot of the genus Nestor, especially the
   brown parrot (Nestor meridionalis).
   [1913 Webster]

   Note: The mountain kaka, or kea (Nestor notabilis), is
         remarkable for having recently acquired carnivorous
         habits. It attacks and kills lambs and pigs, sometimes
         doing great damage.
         [1913 Webster]

   Night kaka. (Zool.) The kakapo.
      [1913 Webster]