(Phacochoerus aethiopicus) Warthogs – gregarious, diurnal living in abandoned aardvark holes during the night, which they enter backwards as an escape and protective measure. They are fond of wallowing and rubbing mud-covered bodies on stumps, rocks and trunks of trees. Warthog have a habit of rooting for grass rhizomes which is usually, in many instances, the start of a wallow.