About 20 years ago, we had a work party at the deer camp I belong to, in the Adirondacks. We were putting a new roof on the porch that had been built a few years before. There was some improvised flashing between the main camp and the roof of the porch, so I was asked to go on the roof of the porch (maybe 100 sq. ft.) and rip the flashing off. There were six bats hanging out under the flashing, and the batshit was a cloud of dust. Effin' wonderful. I was trying to ward the bats off as they flew away, and I damn near fell off that roof twice in about a minute. I'm not too keen on bats (except to kill mosquitoes).