Source : Webster's Revised Unabridged Dictionary (1913)

Screamer \Scream"er\, n. (Zo["o]l.)
   Any one of three species of South American birds constituting
   the family {Anhimid[ae]}, and the suborder {Palamede[ae]}.
   They have two spines on each wing, and the head is either
   crested or horned. They are easily tamed, and then serve as
   guardians for other poultry. The crested screamers, or
   chajas, belong to the genus {Chauna}. The horned screamer, or
   kamichi, is {Palamedea cornuta}.

Anhima \An"hi*ma\, n. [Brazilian name.]
   A South American aquatic bird; the horned screamer or kamichi
   ({Palamedea cornuta}). See {Kamichi}.