Thousands of starlings surround a lone bird of prey which had had swooped down to pick off a straggler. "Starlings have a very particular way of defending themselves from their predators like falcons and harriers. They form a large tightly packed flock and mob their enemy, scaring it off, frequently expanding and contracting and changing shape."
You Won't Believe These Patterns Created by Flocks of Birds in Flight. _PHOTOGRAPHER: https://secure.flickr.com/photos/tonyarmstrong/5381370808/ _FOUND AT: http://io9.com/you-wont-believe-the-patterns-created-by-flocks-of-bir-1469575403