A Quiet Church with a Busy Roof
When your day job as a property manager and your hobby for wildlife rehab come together, it's a good day. That’s exactly what happened after I found a lot of bat guano inside one of our closed-up churches. What followed turned into a night I won’t forget anytime soon.
I needed to find out if bats were still using the church and whether they might overwinter there. So after contacting a professional ecology consulting firm, we planned an evening visit to watch for any activity.
Sunset was at 7:15 p.m., so we met at the church around 7:00 p.m. to get set up. We had some surveillance gear to place inside, near the nave. Two ecologists came out to help. One was set up near the front of the church, and the other toward the back. I got to tag along and observe, which was a great chance to learn more about how they do this kind of work.
They explained that if any bats were still inside, they’d probably start leaving about 30 minutes after sunset. Sure enough, right on time at 7:40 p.m., one bat dropped down and flew out. Then another one right after that. It turned into a steady stream for about 15 minutes. A couple of times, two bats flew out almost at the same time, which can mean it was a mom and her pup heading out together. We ended up counting 35 bats leaving the church that night.
Even though the equipment didn’t show movement inside the main part of the building, the number of bats we saw coming out tells us they’re definitely swarming and will likely overwinter up in the roof. The recordings suggested a mix of species. Most were big brown bats, but we also picked up signs of little brown myotis, which are endangered. There were also a couple of hoary bats in the area, but they usually don’t roost in buildings, so they were probably just passing through.
Next steps include cleaning up the guano, sealing any gaps leading into the interior of the the church (being careful not to trap any bats inside) and allowing the bats to remain in the roof over the winter. We plan to return next summer when they’re more active to conduct an acoustic survey and hopefully gather better data on the colony's size. At that point, we'll develop a long-term solution that protects both the building and the bats.
It was one of those nights where two different parts of my life came together in the best way. Kind of odd, kind of surprising, but totally worth it. And the story continues.
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