Hippopotamus (Hippopotamus amphibious) group bathing in the water while a group of elephants standing in the back, Queen Elizabeth National Park, Uganda, East Africa, Africa

Hippopotamus (Hippopotamus amphibious) group bathing in the water, Queen Elizabeth National Park, Uganda, East Africa, Africa

Hippopotamus (Hippopotamus amphibious) bathing in the water, Queen Elizabeth National Park, Uganda, East Africa, Africa

Hippopotamus (Hippopotamus amphibious), Murchison Falls National Park, Uganda, East Africa, Africa

Hippopotamus (Hippopotamus Amphibious), Zambia, Africa

Hippopotamus (Hippopotamus Amphibious), Zambia, Africa

Hippopotamus (Hippopotamus Amphibious), Zambia, Africa

Hippopotamus (Hippopotamus amphibius), Masai Mara, Kenya, East Africa, Africa

Hippopotamus (Hippopotamus amphibious), Masai Mara National Reserve, Kenya, East Africa, Africa

Hippopotamus among river cabbage, Grumeti, Tanzania

Hippo, (Hippopotamus amphibious) challenging with wide open mouth in Kwando River. Bwabwata National Park, Namibia, Africa

Hippo, (Hippopotamus amphibious) challenging in Kwando River. Bwabwata National Park, Namibia, Africa

Hippo, (Hippopotamus amphibious) is challenging, open mouth and teeth. Angry facial expression. Behind the hippo pod. Kwando River, Bwabwata National Park, Namibia, Africa

Side-view head shot of yawning Hippopotamus (Hippopotamus amphibius) in Ngorongoro Conservation Area, Tanzania

Hippopotamus (Hippopotamus amphibious) standing ankle-deep in shallow water in Katavi National Park, Tanzania

Two Hippopotamus (Hippopotamus amphibious) face off aggressively in shallow water in Katavi National Park, Tanzania

Group of Hippopotamus (Hippopotamus amphibious, ) with Red-billed Oxpeckers (Buphagus erythrorhynchus) lie on sandy river bank in Katavi National Park, Tanzania