Austin’s Congress Avenue Bridge is home to roughly 1.5 million Mexican free-tailed bats—the world’s largest urban bat colony. Spectators gather here on summer nights, cameras in hand, to watch these flying mammals emerge from beneath the bridge to hunt in the sky above Lady Bird Lake.
You can witness Austin’s beloved flying residents from various locations, including the eastern walkway of Ann W. Richards Congress Avenue Bridge, the grassy hillside at the base of the bridge, or from Lady Bird Lake in a rented kayak, canoe, or paddle board. Bat-watching tours take various forms—enjoy a guided cycling tour around the lake before arriving at the bridge in time for bat viewing, paddle to the bridge on a kayak tour, or see the bats as part of a GPS-led scavenger hunt through the Texas capital.
Things to Know Before You Go
The Congress Bridge bats are a must-see for animal lovers and first-time visitors to Austin.
The bats’ dramatic appearance usually lasts between 45 and 60 minutes.
A typical bat tour lasts two to three hours, depending on the option chosen.
The public walkway along Congress Avenue Bridge is wheelchair accessible.
How to Get There
The Congress Avenue Bridge is located roughly one mile (1.6 kilometers) from downtown Austin. The easiest way to get there is on foot or by road. Parking is available near the Austin American-Statesman office, Auditorium Shores, and along East Riverside Drive.
When to Get There
The Austin bats can be seen between March and November, with their numbers peaking in summer. The mammals begin to emerge about 20 minutes before sundown; due to the spectacle’s popularity, it’s a good idea to show up an hour or so before sunset to stake out a spot on the bridge.
Austin Bat Trivia
The free-tailed bat colony that lives beneath South Congress Bridge was once feared, but today the bats are appreciated for keeping the city’s bug population under control. Each night, the colony consumes 20,000 to 30,000 pounds (9,072 to 13,608 kilograms) of insects. This particular species gets its name from its long tail, which measures about a third of the length of its body. The bats often fly up to two miles (3.2 kilometers) high and are among the fastest mammals in the world.