Visit an eerie underground city in a dark cave! Large colonies of bats live together in caves for warmth and protection. There may be up to 20 million bats roosting in just one cave! Not all bats live in caves, however; each of the many bat species worldwide has adapted to the unique challenges of its environment and lives in a special home. Jaw-dropping photos, a habitat map, and fascinating information will captivate young readers as they learn about these truly spectacular animal towns.