screamers

from The Collaborative International Dictionary of English v.0.48

Palamedeae \Pal`a*me"de*[ae]\, n. pl. [NL.] (Zool.)
   An order, or suborder, including the kamichi, and allied
   South American birds; -- called also {screamers}. In many
   anatomical characters they are allied to the Anseres, but
   they externally resemble the wading birds.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Anhimidae \Anhimidae\ n.
   a family of aquatic birds of South America. They are called
   {screamers} due to their harsh trumpeting call.

   Syn: family {Anhimidae}.
        [WordNet 1.5]