Nocturnal mammals are animals that are active during the night and sleep during the day. The term nocturnal mammal can refer to a variety of species, including badgers, which are small omnivorous mammals with short legs and long bodies; lemurs, which are primates native to Madagascar; tapirs, which are large herbivorous mammals with long snouts; bats, which are small flying mammals; and loris, which are small primates native to Southeast Asia.