Source : Webster's Revised Unabridged Dictionary (1913)

Pitta \Pit"ta\ (p[i^]t"t[.a]), n. (Zo["o]l.)
   Any one of a large group of bright-colored clamatorial birds
   belonging to {Pitta}, and allied genera of the family
   {Pittid[ae]}. Most of the species are varied with three or
   more colors, such as blue, green, crimson, yellow, purple,
   and black. They are called also {ground thrushes}, and {Old
   World ant thrushes}; but they are not related to the true
   thrushes.

   Note: The pittas are most abundant in the East Indies, but
         some inhabit Southern Asia, Africa, and Australia. They
         live mostly upon the ground, and feed upon insects of
         various kinds.

Source : WordNet®

pitta
     n : any bird of the genus Pitta; brilliantly colored chiefly
         terrestrial birds with short wings and tail and stout
         bills