Birds will imitate behaviors from other birds in their flock. It doesn't take long for the flock to learn a new behavior. Ravens and blackbirds seem to be very fast learners but vultures also have a strong sense of "community unity" and are opportunists to a great degree.
On the farm, we had to remove a flock of domestic geese as they wouldn't stop trimming the wires off the trucks and cars. They were a pain, within a few weeks all the vehicles needed new rear brake light or license plate wiring.