Nothing was happening, a Great Blue sat on a nest and a Great Egret was planning a spot a little higher up the tree. This is prime real estate and there will be multiple nests, multiple species.
I never saw the second Heron come back.
He was not at all happy to find a Great Egret nearby. The noise was what got my attention. The Great Egret is big enough to fight back, but Herons are bigger.
The Egret dropped back and left for another spot.
This repeated itself right here several times.
The flow is;
first the Heron drives off an Egret
an Egret returns for the spot and they fight
another Egret and they fight
finally an uneasy peace with nests built
The Egret will leave enough space between them, the Heron gets tired of the same old fight.
However, after the Heron chicks are half grown the adults leave to provide food. The Egrets will then attack the chicks. Some young fight off the Egrets, some do not.
Egrets are bullies in rookeries. Pay back is Anhinga attack Egret nests.
None of this is pretty. But it goes on year after year.
As an FYI, any photographs I capture that are too graphic are not published.