I recorded this posture by Turkey Vultures over carcasses. These are only a few examples, it happened a couple other times as well.
I cannot determine if this is mantling like hawks and owls do or a signal to other vultures or something else entirely.

Amazing photographs. Thank you. What is the camera?
The camera is Moultrie Game Spy 55. its pretty good but the video option comes out a little over exposed.
thanks
Andy