Fantastic heron sequence! Numbers 2 and 3 are very strong on their own....and in the 4th shot, the defeated bird seems to have a feather or two falling out and floating in mid-air as he beats a hasty retreat.
Herons, when riled, are pretty nasty,combative birds. About 10 years ago, my fishing partner and I watched a great blue heron kick the "tail" of an osprey that came in and taunted it. Both birds wanted to perch in an old dead snaggy tree above the salmon-fishing hole we were in, probably because at that time of year, dead or injured steelhead smolts would wash up to the top and swirl around in the eddy of the hole--IOW, a prime fishing spot was the source of the argument. After a 15 second fight, the osprey flew off, and the heron was triumphant.