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Warthogs and zebras on the savanna. The common warthog is a wild member of the pig family found in grassland, savanna, and woodland in East Africa. Its habits can seem odd: grazing on bended forelegs; entering its burrow backwards; trotting along with tail held erect, like a radio antenna. An omnivore, it uses its rubbery snout to grub up roots and tubers. It often wallows in mud to help regulate its temperature and rid parasites from its largely naked skin.