It’s early for the Great Egrets to begin pairing and building nests. That has not stopped a few from moving into the rookery though. Like the Herons these could be birds born here the last few years.
For now the Egrets keep away from nesting trees, probably safer since Herons are there.
For the most part hanging around the edges and fishing keep them busy. The fly by’s are great because they are not in a hurry.