Bats

These bats roost in whatever space there is between this block of apartments and the next- you can see the join in the wall that they squeeze in and out of. I have tried counting them as they fly out in the evening and there are at least 20, probably many more as they dont all come out together but they all seem to fly off in the same direction evey night. They fly very close at times, right into the balcony area and I often feel the need to duck as they fly past. I don't know what species of bat they are - something else I have to look up but I don't know if the pictures are detailed enough for identification. They look quite big when they are flying but when they crawl in and out of the crack in the wall you can see that they are really tiny.