Tim has begun to learn how to photograph Bats in flight and was kind enough to share his knowledge and equipment with me. I could not sync my camera to his camera/flashes, so I took 20 second exposures. I got an exposure any time Tim's flashes fired off. Several times, more than one Bat came through within the 20 seconds, so I ended up with some shots like this one. Looks like they are flying in formation, but in reality, two completely separate trips above the guzzler.