We occasionally noticed a bat flying around our lab space but didn’t pay too much attention to it. On our last night however, when it was unseasonably cold, several bats decided to use our lab as shelter. Often when the door opened one would fly in and around and then perch underneath one of our lab benches; five in fact were roosting together there at one point. I didn’t think too much of it until I recalled that bats have some pretty bizarre fly parasites that wander about through their fur. Suddenly this became an opportunity to make a novel entomological find.