Here come the bats! Under the Congress bridge in downtown Austin lives the largest urban bat colony in the world, estimated at 1.5 million bats in the spring, summer and fall. Another colony lives under the McNeil overpass in Round Rock. Every night around dusk, the bats emerge from their colonies to eat tons of insects overnight. There are so many bats, we can see them on weather radar. | David Yeomans | Meteorologist

Austin Texas city skyline over river bridge sunset. Ann W. Richards Congress Avenue Bridge cross Lady Bird Lake, Town Lake is a river reservoir on Colorado River in Austin, Texas.

Austin Texas dark night traffic river city center. Ann W. Richards Congress Avenue Bridge cross Lady Bird Lake, Town Lake is a river reservoir on Colorado River in Austin, Texas.