Hippopotamus (Hippopotamus amphibius) yawning, Serengeti National Park, Tanzania, East Africa, Africa

africa animals close up color image day east africa environment head and shoulders hippopotamus hippopotamus amphibius horizontal mouth open national park nature nobody one animal outdoors photography roaring serengeti serengeti national park side view swimming tanzania travel travel destinations yawning african animal bellowing close up color colour daytime eastern africa outside park roar sport swim tanzanian water yawn