1) Psophiidae 2) Swans 
A family (Psophiidae, 3 species) of large, hump-backed, chicken-like birds that inhabit the rain forests and floodplains of Amazonia. Trumpeters forage on the ground in flocks, but roost and nest colonially in trees. They eat both plants and animals (including reptiles and amphibians, and even carrion), and sometimes follow army ants for the arthro...