Heron mobbed by Crow

I had the best sightings to date today of Herons, the Juvenilles are practicing flying from their nest across the lake and landing on some branches a few hundred yards away, one of the adults sat close by to keep an eye on things.
For a short time my attention was given to photographing a newly hatched Coots chick when I heard an almighty disturbance going on and as I turned round I saw a Heron being attacked, I think its called 'mobbed' by a crow, quite spectacular. I rushed a shot and this is what I got. I was delighted as reasonably in focus.
Today was a good day.