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.<br />
<br />
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.