Peregrine?

This shot was taken in Gabriel Park.  The bird was larger-than-crow sized, and was fluffing its tail feathers in a pose that vaguely resembled mantling.  The bird was far away, and in this zoomed in shot has turned its head 180 degrees towards the camera.  As far as we know, the spotting and facial coloring is most consistent with a peregrine.

Update:  We have had many votes for Merlin as well as some for Peregrine.

possible peregrine