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How long can a male hippopotamus hold a mating territory?
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hippopotamus
The word hippopotamus is Greek for “river horse,” which reflects their behavior: they are often seen basking on the banks or sleeping in the waters of rivers, lakes, and swamps across Africa. They favor shallow areas where they can sleep half-submerged, though these places can become quite crowded—as many as 150 hippos may use one pool in the dry season.
A dominant male hippopotamus can hold a mating territory for 12 years or more.1