It protects their face when they fight. They sleep underground at night in burrows that they steal from other animals such as aardvark. ... Female warthogs let their babies go into their burrows first, then they back into the burrow so that if anything comes into the burrow as a threat she can run out and protect them.

Do warthogs burrow?

Common warthogs do not dig their own burrows. They often take over found dens or abandoned aardvark burrows to seek shelter and raise their young.

Do warthogs live in holes?

Warthogs live in dens made by aardvarks. They don't fight for the holes, though. Warthogs are generally passive and look for already abandoned dens to make their homes.