What time of year do bats have babies? Over the summer season, bats give birth. During the warmer summer months, the baby bats are born after a few weeks of pregnancy. Babies stay attached to their mother until they are able to go hunting and traveling by themselves. Where conditions are appropriate, the colony will stay at this roost through winter. https://thecritterteam.com/ The Critter Team Houston, TX (281) 667-0171 Like us on Facebook! https://www.facebook.com/thecritterteam/ https://local.google.com/place?id=5282908303457130656&use=posts&lpsid=7880925275550068544