They avoid rainforest, deserts and high mountains. Behavior When water is available, warthogs drink regularly and enjoy wallowing in muddy places. As part of their grooming they also take sand baths, rub against trees and termite mounds and let tick birds pick insects off their bodies. Warthogs live in family groups of a female and her young. Sometimes another female will join the group.
Males normally live by themselves, only joining the groups to mate.
Warthogs engage in ritual fights in which they charge straight on, clashing heads when they meet. Fights between males can be violent and bloody. Warthogs sleep and rest in holes, which at times they line with grass, perhaps to make them warmer. Although they can excavate, warthogs normally do not dig holes but use those dug by other animals, preferably aardvarks. The warthog is mainly a grazer and has adapted an interesting practice of kneeling on its calloused, hairy, padded knees to eat short grass.