Common warthogs are not territorial, but instead occupy a home range. Common warthogs live in groups called sounders. Females live in sounders with their young and with other females. Females tend to stay in their natal groups, while males leave, but stay within the home range. Sub-adult males associate in bachelor groups, but live alone when they become adults. Adult males only join sounders with estrous females.
The pygmy hippopotamus looks like a mini version of its larger relative, the hippopotamus The pygmy hippo has adaptations for spending time in the water but is much less aquatic than the hippo. Its nose and ears close underwater just like a hippo’s do, but its head is rounder and narrower, its neck is proportionally longer, and its eyes are not on the top of its head. The pygmy hippo’s feet are less webbed and its toes more free than those of the hippo, and its legs are longer than its huge cousin’s. The pygmy hippo’s teeth are also different: it only has one pair of incisors, while the hippo has two or three.
All elephants have several distinctive features, the most notable of which is a long trunk or proboscis, used for many purposes, particularly breathing, lifting water, and grasping objects.
