A more appropriate name for a bat nursery is a maternity roost.
Most bat species give live birth to only one pup per year. However, some species can give birth to twins or multiple pups. For 3 to 4 weeks, the baby is incapable of flying and is latched onto its mother’s nipple. It is not until they are about five weeks old that the baby bat can begin flying lessons and leaves its roost.
If you live in Texas, there are at least two large bat nurseries. The smaller (Mason, Tx) is 3+ million bats for a couple of months.
That’s really cool, wish I was closer!
Where the larger one?
San Antonio