Heron Attack!!

I thought that I had figured out a way to discourage the heron from
visiting. I put up a fake heron. I put in a duck. I stretched fishing line
over the top of the pond and around the pond.
The heron came straight down from a nearby tree and landed next to the pond.
Then stepped through the fishing line to the pond.
So I put an electric fence around the pond with 4 wires. It came down and
stepped through the fence. It jumped a bit but didn't stop.
So I put 2 more wires on the fence. The heron came down and landed inside
the fence. The fence is about 3 feet from the pond with shrubs and rocks.
So I moved the fence right to the pond edge inside the shrubs etc. We'll see
what happens now.
The heron just came back. Both of us were in the yard by the pond with two
dogs there. It swooped over and landed on the roof of the house.
Each time it got into the pond I raced out and clapped my hands to scare it
off. It just moved off to a nearby tree or roof and waited.
It seemed to watch what I was doing.
I thought it needed a large flight path to land. I know now that it does
not. It came down almost vertically.
There seems to be a pair of them. I don't know if it is the same one each
time.
Anyone got anymore hints. Apart from getting ride of my fish. Not that I
have many left.