I don't know, Doc. It has always been a generally accepted notion that allowing wild critters to take up living in close proximity to domesticated animals and humans is not healthy. They carry diseases and the poop everywhere...the poop can also carry unhealthy diseases besides just being poop in general.

My old man became ill once, many many years ago before he contracted a case of the final disease. You know...death...the final disease. The doctors potificated and probed and prodded until he ran into one who said...you have histoplasmosis. We had a small hole in the soffit of our house...it was where the upstairs HVAC piping went through and wasn't sealed very well. The birds got up in there and gave the old man histo.

Wayne's advice...shooo that thing outta there. If it keeps coming back...kill it. I would and did the same for the feral cats we had hanging around the house once. Each successive generation of cats became more and more feral. We were all the time finding litters of dead kittens everywhere. Shot either 13 or 19 or those damned cats. Can't even remember the number now.