The brown rat, which is one of the most common rats in the world, is famous for its ability to burrow underground tunnels.
This species of rat usually builds itself on the ground level, adjacent to a home or building that is occupied by people.
This allows the rats to live close to a source of readily available food, as well as provide for numerous hiding places and places to live underground as they burrow tunnels through the earth.
These tunnels provide protection against heat and cold, and also offer a quick escape route in the face of a predator.
In order to combat rat burrowing, the tunnels are sometimes flooded with water in order to force the rats out, and then the entrances are filled in with earth.