Hippopotamus, facts and photos - National Geographic
Hippopotamus - National Geographic Kids
How Moo Deng the pygmy hippo is different from common hippos
Hippo | Amazing Animals - YouTube
10 Hippo Facts! - National Geographic Kids
Proof African Hippos Do What They Want - National Geographic
Hippopotamus - The River Horses | World's Deadliest | National Geographic
A school of hippos gives an aggressive warning sign - YouTube
hippo Archives - National Geographic Kids
Hippos had found refuge in Uganda’s national ... - National Geographic