The Arrau River turtle, South American river turtle, or Giant South American turtle (Podocnemis expansa), also known as the Charapa turtle, Arrau turtle, Tartaruga-da-amazônia, or Araú, is the largest of the side-neck turtles (Pleurodira). It is found in the Amazon Basin (Peru, Brazil, Colombia, Venezuela, and so on). Adults often reach 1 m in length. Females have wide flattened shells and are larger and more numerous than the males. Adult Arraus feed entirely on plant food. The...