Why Did the Bats Choose the Congress Avenue Bridge?: While bats have called Austin home for many years, it was after renovations to the Congress Avenue bridge over Town Lake in 1980 that they found their favorite hang out. Narrow but deep openings created in the bridge turned out to be perfect accommodations.
Congress Avenue Bat Flights: Each evening around sunset the Congress Avenue bats emerge like a black cloud from the crevices of the bridge. Covering the countryside in search of food, it is estimated that the bats consume from 10,000 to 30,000 pounds of insects.
Giving birth in June or July, the bats and pups hang around til October when they head back south. Watching the nightly forays for food is a favorite evening activity, especially in late summer.