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Congress Avenue Bridge

Bat Viewing Tips

Everything you need to know before you come to watch the world's largest urban bat colony emerge at dusk.

Viewing Tips

Bats fly every night, as long as it is not actively raining. But they don’t always put on a great show! There are many factors that can make them more cautious to fly:

  • Gusty winds
  • Approaching storms
  • First-quarter moons
  • Large crowds
  • Bright lights
  • Heavy boat traffic

Mid-May to early is maternity season. Only part of the colony will fly close to dark, and even those bats often wait until the crowd leaves.

The bats will fly 20-60 minutes after rain showers, but long-lasting rain will keep them in for the night.

At the Bat Viewing Area on the south side of the bridge, you’ll want to be down by the fence at the shoreline when the bats fly for a close-up view. Don’t forget to check over the treeline to see if bats are going to altitude; this can be spectacular!

Families with children and/or pets are advised to watch the bats from underneath the bridge, as the bridge can get quite crowded next to a busy road.

As you leave, the south end of the bridge near the parking lot offers an intimate view of bats under the lights. This is super fun even after dark!

Want a Guided Experience?

Austin Bat Refuge educators are at the bridge most Friday and Saturday evenings March through October. Join us below the south end of the bridge — free, no registration required.

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