Warthogs are so named because of the unsightly, hard, wart-like bumps on their skin, which offer protection. They are mostly bald with some sparse hair and a mane extending the length of the back. They are related to domestic pigs. They may look ferocious and possess four tusks (which can grow very long) but they are herbivores and usually prefer flight over fight, being able to run a top speed of 30 mph! They hide out in dens made by aardvarks, where they also raise their young, typically reversing in so that their tusks face outside danger.