The Collaborative International Dictionary of English v.0.48:

Kamichi \Ka"mi*chi\, n. (Zool.)
   A curious South American bird (Anhima  or {Palamedea
   cornuta), often domesticated by the natives and kept with
   poultry, which it defends against birds of prey. It has a
   long, slender, hornlike ornament on its head, and two sharp
   spurs on each wing. Although its beak, feet, and legs
   resemble those of gallinaceous birds, it is related in
   anatomical characters to the ducks and geese (Anseres).
   Called also horned screamer. The name is sometimes applied
   also to the chaja. See Chaja, and Screamer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Chaja \Cha"ja\, n. [Native name.] (Zool.)
   The crested screamer of Brazil (Palamedea chavaria syn.
   Chauna chavaria), so called in imitation of its notes; --
   called also chauna, and faithful kamichi. It is often
   domesticated and is useful in guarding other poultry. See
   Kamichi.
   [1913 Webster]

WordNet (r) 3.0 (2006):

chaja
    n 1: largest crested screamer; native to southern Brazil and
         Argentina [syn: chaja, Chauna torquata]