A big group of Hippos found resting as well as grazing on the bank of a river in the green banks

africa mammal hippo hippopotamus park wildlife wild national safari wilderness animal nature dangerous water mouth big aquatic african river hippos danger reserve conservation huge large herbivore tourism savannah oxpecker masai kenya amphibius amphibious environment unpredictable semiaquatic hippopotamidae big five river horse hippopotamus amphibius herbivorous serengeti ferocious outdoors furious behaviour brown zambezi okavango