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Is there a chiropterist in the house?
OK, there may be an issue here.

A couple of days ago, skitten found a bat in the house. More accurately, she was taking a shower, and found a bat in the bathroom with her. With a little work, I was able to get the bat out of the house. We don't know how the bat got into the bathroom, as there doesn't seem to be any good ways in.

She's at a jam right now, and I must say bats look beautiful in flight, even at relatively close range; they are nimble little fliers, and the swoops and turns are delightful to watch. In other words, I saw a bat in the house.

As I was getting the cats out of the way, the bat made its way into the basement, where I presume it is now. Our basement has exposed floor joists (old enough to be made from rough-cut, unsmoothed boards), rough rock&morter and cinderblock walls, lots of exposed pipes -- and poor lighting. I saw the bat flying around in the basement, land on the walls a couple of times, then fly into a dark corner and vanish. At least, I haven't seen him since.

I did find a site that said the most common reason to have a bat in your house is that bats are roosting somewhere in the building. I just don't have any idea where. To me, the most likely spot would be in a huge area between two roofs1, which is open to both the open eaves and (unfortunately) the 2nd floor. But I've never seen a bat on the 2nd floor. I do not believe they are roosting in any of the rooms or basement, but its hard to tell. For clarity, I'll mention that the site which said this is a commercial site in the business of bat roost eradication.

Another site (that specifically aimed at bats in NYS) that I looked at the other day suggested that in July&August, approximately, bats in this area disband their roosts and find new roosts, meaning that bat/house encounters could be from inquisitive bats looking for a roosting spot, not necessarily from existing roosts in the house.

(As an aside, I was able to convince the bat to take the open door on one of its passes. It is now out of the house).

So I don't know what to think... Do I have, in some unknown and unlikely corner of the house, a roost of bats, or are curious bats looking for a home and checking mine out?

[1] (when one set of owners built an addition, they gave it a full roof which met the main part of the building around the level of the 2nd floor. When later owners did something (added a 2nd floor bathroom, maybe) they extended the main roof out, so there is now a dead zone in the house which has a shingled roof built over a shingled roof)

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It's possible the bat was just looking for a day-roost and found its way in through a crack, and couldn't get out. If this is the only bat you've seen then chances are you don't have a resident colony. Houses that are homes to a colony have a constant stream of bats coming inside through cracks and gaps.

I know Barb had bats roosting in the eaves of her front porch. We watched them fly out one night at dusk. The speed at which they shot out was amazing...like little furry bullets. I wanted to reach up and catch one (unlikely) because they were so beautiful.

I know she's busy right now with the new baby and all, but I'm sure she wouldn't mind giving you whatever information she has.

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