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

africa animals beauty in nature color image day east africa environment five animals head and shoulders hippopotamus hippopotamus amphibius howling mouth nature nobody opening outdoors photography relaxation river serengeti national park tanzania travel vertical wallowing water wildlife yawning african animal color colour daytime eastern africa open outside resting tanzanian yawn