David reports:
"Very exciting bird. We knew right away it was something different as it had a very weird wing flap. It stayed around a long time, mostly high in the air. It would go north, then south, then east, then west. It was often following high above a vulture. Finally it left. Then a minute or so later it reappeared near the knob, low and to the south. Unfortunately, I had put my camera away by then."
These are some of the photos: