Prairie dogs live in underground burrows, extensive warrens of tunnels and chambers marked by many
mounds of packed earth at their surface entrances. Burrows have defined nurseries, sleeping quarters,
and even toilets. They also feature listening posts near exits, so animals can safely keep tabs on
the movements of predators outside. Prairie dogs spend a lot of time building and rebuilding these
dwellings. Other animals benefit from their labors. Burrows may be shared by snakes, burrowing owls,
and even rare black-footed ferrets, which hunt prairie dogs in their own dwellings. National Geographic.