I've observed over 200 vulture in a single committee. Most folks don't realize that the Turkey vultures forage by smell. They can see other vultures several miles distant. Their primary foraging strategy is to spread out as a scattered flock sniffing their way across the land scape. When they smell carrion they circle the odor. Seeing this other animals are then attracted. That is significant for several reasons. A committee is more efficient locating the food. Our testing showed that they could locate a buried carcass buried as deep as 10 inches and dig it up. Additionally the TV has a relatively weak beak leaving the nutrition of larger animals with tough hides unavailable. The circling also serves to attract more powerful scavengers capable of opening the carcass allowing access. In western rangelands, it might be Coyotes, bears or golden eagles. Avian scavengers will circle thousands of feet over the foraging vultures in dense jungle environs. The King vulture depends on the this to locate food. A case of interspecific cooperation.
Me too, that practice is important for falcon survival. An error at 200 mph likely to result in fatality. Mortality among raptor fledglings approach 80%. Accipiters (being true hawks) on the other hand are more efficient hunters and content as fearless hunters not afraid of a fight. Just as hazardous. Still not as vicious as weasels.