 The remaining daylight leaks out of the sky, and it's official. It's bath time. It's pitch black, so I put on a headlamp and go looking for some of the other researchers who've strung up nets closer to the ground at eye level. They've turned the area into an aerial obstacle course for the bats. So they just zoom past here so quickly. Even when we're sitting around waiting for them to get into our nets, we just watch them flying all around us.