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Hippopotamus - Wikipedia
15 Hippopotamus Facts - Fact Animal
Hippopotamus, facts and photos - National Geographic
Hippopotamus | Diet & Facts | Britannica
Hippopotamus | Species | WWF - World Wildlife Fund
Hippopotamus - Description, Habitat, Image, Diet, and …
Hippopotamus - National Geographic Kids
Hippopotamus - Simple English Wikipedia, the free encyclopedia
Characteristics and behavior of the hippopotamus | Britannica
Common Hippo - Facts, Diet, Habitat & Pictures on Animalia.bio