How many birthdays does an average bat have?

Once bats learn to fly (about three weeks after birth), their survival rate is much higher. On average, a bat can live to around 20 years old. The oldest known wild brown bat lived to be 30. When they are younger, they can fall from their shelter and not be able to fly back up while others catch diseases or parasites.

Researchers, unfortunately, don't have much information on bat birthday parties.