3. Microbats life cycle In some bat species one male mates with many female bats. To attract mates, bats may vocalize, flap their wings, and groom each other. After a two-month gestation , most Microbats species give birth to one pup. These babies can weigh up to one-third as much as their mother. Some Microbats form nursery colonies where mothers drop off their babies when they fly out to feed. When they return, mothers find their own baby using scent and sounds.