The term BELFRY DENIZENS refers to BATS, which are four-letter creatures that live in belfries. Belfries are typically found on top of churches and other tall buildings, and they provide a safe and sheltered environment for BATS to live in. BATS are nocturnal animals, meaning they are active at night and sleep during the day. They feed on insects, and their wings allow them to fly around and catch their prey.