Holy Crap! That is the cleaned up version of what I said at 5:30 this morning when I started to open the back door to let the dogs out.
In the end, I turned off all the lights and let the dogs go out the front door where I kept a can of wasp spray and a broom handy. There were no sudden attacks, so we went back in and waited for the sun to come up.
When I left for work, the only signs of life were the occasional flutter from one of the flying objects grasping for the last few breaths of life. I have no idea where the rest of them flew off to.
ringtail cat. Any idea what these flying beasts could be?