Hippopotamus (also known as Behemoth) is the popular name of the two remaining species of herbivorous mammal of the family Hippopotamidae now only found in Africa, but formally found across Britain, Europe and Asia. The common Hippopotamus (Hippopotamus amphibious) is a large, semi-aquatic herbivorous mammal found in tropical Africa that spends most of its time in rivers. The Pygmy Hippopotamus (Choeropsis liberiensis) is smaller, about the size of a domestic pig, and is found only in lowland forests in west Africa. The Pygmy Hippopotamus is more terrestrial than the Common Hippopotamus, but spends a lot of time in swamps. While the Common Hippopotamus is a social animal, the Pygmy Hippopotamus is solitary, feeding at night on aquatic plants, grass, algae and bushes. Research Hippopotamus More pictures of Hippopotamus