This video is sweeping the Internet. If you haven't seen it yet you'll love watching this huge starling flock, called a murmuration, swirling above two girls canoeing in Ireland.
Starlings flock in large numbers in the winter when they're getting ready to roost. If the flock sees a predator, each bird pulls in closer to his neighbor until the mass of birds looks like a solid swirling ball.
This flock must feel threatened -- they're flying that close!
And I wonder ... where's the peregrine?