Last Friday I went on a long walk through the Back Bay National Wildlife Refuge. I watched beautiful great egret flying over the marsh and then noticed that it was being followed by a red-winged blackbird. The egret landed, and the blackbird flew around it, alternately bopping it on the head and hovering above it to harass it. Not sure what that was about but it was comical. The egret was very stoic as you can see from this shot.
Here's another in which the egret tried to duck (no pun intended).