Two pairs of Great Egrets are nesting condo style, their homes less than two feet apart separated only by a small branch. This is a prized location, surrounded by water for extra safety from ground predators, so there was competition for the nest sites.
Their nests claimed, each pair went about its business this sunny afternoon.
The ritual is very similar to what I have observed with the Great Blue Heron pairs: bring sticks, re-arrange sticks, mate, bring sticks.
Squawking from the other nest is mostly ignored, a lot like humans living in close proximity.