San Diego Zoo Global
San Diego Zoo: Hippotpotamus
This resource presents detailed information about the hippotpotamus, including several photos and an audio clip.
Woodland Park Zoo
Woodland Park Zoo: Hippopotamus
Resource features the Hippopotamus. Provides a brief description as well as information on its life cycle, habitat, reproduction and more.
BBC
Bbc: Nature Wildfacts: Hippopotamus
This resource provides detailed information about hippopotamuses.