Wings Not of a Feather Flock Together

While this Great Egret was fishing on this pile of sticks, I noticed a large amount of Dragonflies buzzing around the Egret. Before this I have seen Little Green Herons standing in the same spot picking off the Dragonflies out of the air. I recognized Common Whitetail Dragonflies, but there were many other types buzzing around, especially quite a few really  large ones.