Austin is known worldwide as Bat City. The Congress Avenue Bridge shows the world what's possible when a community chooses coexistence. Here's how to bring that spirit to your park or public space.
"Congress Avenue Bridge and Barton Springs Pool are considered the soul of Austin, bringing nature and people together."— Austin Bat Refuge
Austin is known worldwide as Bat City. Congress Avenue Bridge is widely regarded as a shining example of peaceful coexistence with wildlife in an urban center — a colony once considered a nuisance transformed into one of the city's most beloved cultural and ecological landmarks.
The bridge supports approximately 1.5 million Mexican free-tailed bats. Each summer evening, hundreds of thousands of Austinites and visitors gather to watch the emergence. The colony consumes an estimated 10,000–30,000 pounds of insects per night, providing extraordinary ecological value.
This transformation didn't happen by accident. It took community education, deliberate policy choices, and organizations like Austin Bat Refuge stewarding the relationship between humans and bats for decades. It can happen in your park too.
Native plants support the moth, beetle, and mosquito populations that bats depend on as food. Night-blooming species are especially valuable, attracting insects to areas where bats will forage.
Mature trees with loose bark, cavities, and dense foliage provide daytime roosting habitat for many bat species. Old-growth trees are irreplaceable roost sites — protect them whenever possible.
Bats need to drink regularly, skimming water surfaces during flight. Ponds, streams, and even retention basins near native plantings create ideal bat foraging corridors.
Pesticides kill the insects bats eat, destroying their food supply. Parks that eliminate chemical pest control — and instead rely on bats — benefit both bats and park visitors.
Bat boxes provide supplemental roosting habitat, especially valuable where natural roost sites have been reduced. Properly sited and built bat boxes can support colonies of dozens to hundreds of bats.
| Feature | Recommendation |
|---|---|
| Interior chambers | 3–4 (multi-chamber outperforms single) |
| Landing area | 3–6 inches below entry point |
| Chamber depth | ¾ inch (optimal for most TX species) |
| Interior surface | Rough-cut or grooved for grip |
| Color (Texas) | Medium to dark (heat retention) |
| Caulking | All exterior seams (weatherproofing) |
| Material | Untreated cedar or pine (no pressure-treated) |
Many bat species avoid brightly lit areas, which can disrupt foraging behavior and access to roosts. Reduce or eliminate lighting along bat flight corridors and near known roost sites.
When lighting is necessary, use warm-spectrum LEDs (amber or red) rather than blue-white LEDs. White and blue light attracts insects, which in turn attracts light-tolerant bat species — but disrupts more sensitive species.
Fully shielded, downward-directed fixtures minimize light pollution and reduce impact on bat behavior. This also improves lighting efficiency and benefits migrating birds.
Program lights to turn off during peak bat activity hours (approximately 30 minutes after sunset to 30 minutes before sunrise). Motion sensors ensure lights are only active when needed.
Post educational signs near bat roosts and water features explaining bat behavior, their ecological role, and guidelines for coexistence. Austin Bat Refuge can provide content and design guidance.
Organized bat-watching events build community connection to wildlife. Austin Bat Refuge staff or volunteers can lead guided programs at parks with active bat populations.
Equip park rangers and maintenance staff to answer bat questions from the public and to handle bat encounters safely. We offer training sessions for park departments.
We offer on-site consultations for parks departments, municipalities, and conservation organizations. We can help you assess your site's bat potential, design a habitat enhancement plan, and develop educational materials.