A prairie dog is a burrowing rodent that lives in large underground colonies across the grasslands of North America. Despite their name, prairie dogs aren't dogs at all: they're actually related to squirrels and groundhogs. They got their name from early American settlers who thought their high-pitched barking calls sounded like a small dog yapping.

Prairie dogs are remarkably social animals. They live in vast towns that can stretch for miles underground, with hundreds or even thousands of members. These towns have complex tunnel systems with different rooms for sleeping, storing food, and raising babies. Prairie dogs post sentries who watch for predators like hawks, coyotes, and badgers. When danger approaches, the sentry gives a sharp warning bark that sends everyone diving into their burrows.

These creatures play a vital role in prairie ecosystems. Their digging aerates the soil and creates homes that other animals use. Their towns once covered millions of acres of the American West. Today, though prairie dog populations have shrunk dramatically due to farming and development, you can still see their towns in places like South Dakota's grasslands, where watching them pop up and down from their burrows is one of nature's most entertaining sights.