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

travel destination photography colour image horizontal hippopotamus hippopotamus amphibius yawning serengeti national park tanzania east africa africa outdoors day animal themes wildlife animals in the wild no people side view head and shoulders mammal safari animals endangered species mouth open head back medium group of animals tiredness exhaustion humour lake pink brown national park