Occasionally bats get in the house.There are quite a few reasons why - maybe you left a door or window open, possibly the cat dragged it in, but by far, the most likely reason, at roughly 90 percent causation, is that you've got a colony of bats living somewhere within the home - the attic, chimney, walls, and so on, and one (or more) of them crawled into the living area of the house.
Now you've got a bat (or 2 ) flying around inside your home! It is not going to strike you or fly into your hair. It really just wants to get outdoors. It is probably flying around in fast circles, occasionally stopping to rest and land, and then fly again.
You have four great options to get the bat out: Choice 1: Open all the doors and windows - bats have great echolocation, and it might realize the door or window is open, and just fly out. Choice 2: Grab it with a butterfly net. This is in fact pretty difficult, especially if it's flying. You may want to wait for it to land, then net it. Take care to close the cover of the net, not crush the delicate bat, and then bring it out and let it go. Wait for it to land, exhausted, and then carefully set the tupperware over the bat from a wall or floor, then slide a sheet of paper between the wall and tupperware, and you have the bat trapped. Choice 3: Smother it in a blanket - drape a blanket over the bat, then lightly pack it up and bring it out and let it go. Bear in mind, bats have very fragile bones in their wings, so take care not to injure it. You can even remove it using thick leather gloves. Bat's are not aggressive, but if you are grabbing one, it is going to defend itself.
Some folks wonder, if a bat was discovered in the home, should you get treated for rabies exposure. I truly think that is overkill. Hardly any bats are rabid, and the possibility that a rabid bat got indoors and bit you without you noticing is extremely small. Then again, rabies is always fatal if not immediately treated, so you are not likely to find a single official piece of advice offered by anybody telling you to ignore it. So I guess I will not either. But when I found a bat within my home, I wouldn't freak out. You do have the choice of keeping the bat and freezing it and having it shipped to test positive for rabies or not. Instead of getting the shots, I guess, but still a pain in the butt. I can't officially recommend that you ignore, but that I probably would not bother with. Your call.
Well, as stated, it is most likely because you have already got a colony of bats living within your home somewhere. The most common time of year for bats to get within the residence is in August. The main reason is because that is when the baby bats begin to fly, and they are newbies - they get confused, they go the wrong way, etc.. They crawl around, they then find a way to get in the house. Sometimes the mother bat will follow the chirping of the baby bat, and the adult bat will get in the house also. So to avoid a problem with bats in the living area within a house, you will need to eliminate the colony of bats before it comes to that.