Walking in E paddock I noticed 2 flocks of Woodpigeon flying west, each one comprising about 250 birds. There were 2 Green Woodpeckers seen in flight, one of which landed then uttered a very loud cacophony of yaffling as a male Sparrowhawk flew in and landed in a nearby tree for a short while. It [the Sprawk] flew off and as it flew another male appeared and flew in the same direction!