Ann W. Richards Congress Avenue Bridge is home to the world’s largest urban bat colony, which is composed of Mexican free-tailed bats. The bats reside beneath the road deck in gaps between the concrete component structures. They are migratory, spending their summers in Austin and the winters in Mexico. According to Bat Conservation International, between 750,000 and 1.5 million bats reside underneath the bridge each summer.
On January 22, 1884, a modern iron bridge funded by private interests was opened at a cost of $74,000.
Find out where to book a tour of the famous Congress Bats!