I think I saw a bat

This is a picture I took at the Natural History Museum and this post's topic is an excuse to upload it. Anyway, so yes, the bat is a flying mammal and there are plenty of them around here, especially in the back garden. Or I think there are anyway, the bats here are, unlike this fruit bat, small and elusive. But tonight, about an hours ago, as darkness was falling down, I think I saw one flying. A small black speck, like a drop of ink flying around. I find it strange sometimes that they are associated with vampires in folklore, bats seem so shy. This one on the left looks actually friendly, more like a dog (I read on Wikipedia that megabats can be called flying foxes) than a flying rodent. It was nice to see a bat, if it was indeed a bat and not a bird.