San Diego Zoo Global
San Diego Zoo: Hippotpotamus
This resource presents detailed information about the hippotpotamus, including several photos and an audio clip.
The BIG zoo
The Big Zoo: Hippopotamus (Hippopotamus Amphibius)
This site provides a general overview of the hippopotamus. Content takes a look at what this animal eats, where it lives, who its predators are, and more. Several audio and video clips are also available.
BBC
Bbc: Nature Wildfacts: Hippopotamus
This resource provides detailed information about hippopotamuses.