Related to mockingbirds and thrashers the Grey Catbird is almost colorless in comparison. They do have a reddish patch under their tail, but it is hard to see in the wild. For what they lack in color, they make up for in song, performance, and stature.
I have to make an assumption here. Because Grey Catbirds look alike, I am not sure this is a male. The normal bird protocol is for the male to display to the female…the female chooses.
This one certainly looks to be displaying, but I didn’t see a female nearby. Maybe he was just rehearsing his performance in case she showed up?
All puffed and fluffy, stretched-out and singing, he looked to be looking for some female attention. The display went on for minutes and then he flew off. I don’t know if he found what he was looking for, but I enjoyed his performance.