Strange explosions of birds...

Whilst damageing my brain trying to contact BT, I looked out of the window and saw starlings and corvids semi-exploding. It seemed not with the same panic as the Goshawk produced at Strumble the other day, but still seemingly reacting to some malevolent presence.
A moment later a kite wafted into view. Kites and buzzards rarely create havoc in my experience but as I pondered, it performed a corkscrew stoop at a corvid on the ground. The corvid dodged and took to flight with the kite making a half hearted attempt to follow before breaking off and wandering on out of view.