Miniature Air Show

There was a miniature air show in my back yard this morning. There were 30 or 40 little birds, a little smaller than the size of your fist, flying around and picking at things. They were hopping around on their own at first but then one of them must have sounded some sort of alarm because they started flying up in groups for the fence or the tree above, sometimes with a few acrobatic loops on the way.