Visit the Philadelphia Zoo

Circus Hippo in Cage

Animals in Bathing Machines

Hippo in Three-Piece Suit Fishing

Variety of Mammals

Hippo Pod, Part of the 10,000 Hippos That Live Along the Luangwa R, Zambia

Hippos in the Drying Mud of the Katuma River in Katavi National Park, Tanzania

Hippopotamus Bares its Teeth at the Sedgwick County Zoo, Kansas

Hippopotamus Goes for a Swim at the Sedgwick County Zoo, Kansas

Hippopotamus' Rear End at the Sedgwick County Zoo, Kansas

Hippopotamus at the Sedgwick County Zoo, Kansas

Hippos Struggle in Drying Mud, The Katuma River, Katavi National Park, Tanzania

Hippopotamus Swimmng in a Brown River, Eyes, Ears Nostrels above Water

Hippo at the Toledo Zoo

Pod of Hippos in the Umfolozi River of the St. Lucia Estuary, South Africa

Pod of Hippos in the Luangwa River, Thousands Live in This River, Zambia

Pod of Hippos, Part of the 10,000 Hippos Along the Luangwa River, Zambia

Nile Hippopotamuses Resting in the Sun on a Grass Savannah Plain, Australia

The Gaping and Deadly Jaws of a Yawning Pygmy Hippopotamus, Melbourne Zoo, Australia

Biggest Mouth Wins

Happy Hippo

Hippos on Bank of Mara River, Kenya

Blank Rhino (Diceros Bicornis) Mara, Kenya

Hippos (Hippopotamus Amphibius), Mara, Kenya

Hippopotamuses, Mating, Tanzania

Hippo, Botswana

Hippo, Botswana

Hippos in River, Kenya

Rhinoceros