Watching bat flights offers the best view from a cruise boat on Town Lake, Austin.jpg
Watching bat flights offers the best view from a cruise boat on Town Lake, Austin. Although the Congress Avenue bats are in residence as early as March, the best bat views are in August when the young pups join their mothers in the nightly flights. It can take as long as 45 minutes for all the bats to exit the bridge. There are plenty of locations along Lady Bird Lake in the vicinity of Congress Avenue where you can watch the bats. Flights normally occur around 8 to 8:30 pm but could be earlier or later. Best bet, call the Bat Hotline at 416-5700 ext. 3636 for times.