Thousands of starlings surround a lone bird of prey which 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."
"Birds of prey, winging from the sea, rising from marshlands, swooping from eyries, hover screaming, gannets, cormorants, vultures, goshawks, climbing woodcocks, peregrines, merlins, blackgrouse, sea eagles, gulls, albatrosses, barnacle geese. The midnight sun is darkened." (15.4665-4669)