Pygmy hippopotamus (Choeropsis liberiensis or Hexaprotodon liberiensis), Rhino and Lion Nature Reserve, South Africa Published March 24, 2018 at 800 × 533 in Cradle of Humankind: Rhino & Lion Nature Reserve Pygmy hippopotamus (Choeropsis liberiensis or Hexaprotodon liberiensis), Rhino and Lion Nature Reserve, South Africa