The southern screamer (Chauna torquata) also known as the crested screamer, is highly vocal and named for its distinctive , far-carrying calls, easily carrying for several miles. The screamer belongs to the order Anseriformes. It is found in southeastern Peru, northern Bolivia, Paraguay, southern Brazil, Uruguay and northern Argentina. It bears no resemblance to true waterfowl, nevertheless, it is closely related and seemingly the surviving relatives of the evolutionary line that led to the present day wildfowl. They have comparatively small, chicken-like heads and short hooked bills, with moderaltely long, stout , unfeathered legs and large feet. Long toes greatly enhance walking ability. There is scarcely any webbing between toes, but they are capable swimmers.
