Oh boy! Bat fun for you...!!!!!
Years ago at the firm I walked out of my office to get something from the kitchen. When I came back, a few minutes later, there was a small bat laying in my office doorway. I thought "How the heck did that get there?"

It was obviously dying from something (rabies is very common in bats), so a coworker of mine held a gallon ziplock bag wide open (we didn't want it to touch any of the outside of the bag were we might touch) while I scooped it up with a piece of cardboard and dumped it in. It's final resting place was our dumpster.
I'm not surprised to see them outside every now and then (after all, Austin does have the worlds largest urban bat colony living under the Congress Ave. Bridge downtown - 1.5 million Mexican free-tailed bats), but, in our building was definitely something new.

Don't go to Las Vegas at night we did that once, and it seemed like a million bats came out over the Pyramid with the light over night. I felt creepy , and never went back. This was over 15 years ago....don't know if they are still there. Look up bats over Las Vegas at night. Too horrible....
View attachment 215258