by cloudman75 » Thu Jul 21, 2011 8:27 pm
They leave after the first frost and cold weather usually around Nov. I have one or two of a small un-identified species that stay , but the Little Browns hibernate. Their first pups are in May or early June depending on the weather. A late spring seems to delay the pups a couple of weeks. The pups fly about 5 to 6 weeks after they are born also depending on the weather. Warm weeks seem to let them grow faster and fly quicker. The best time to do maintenance is after the bats have left in winter for hibernation. If you read Bat house Discussion under my old posts I wrote about bats arriving and first pups, etc. for some previous years.
Frank in Lithia Springs