i think this is a Merlin, was another on the top branch but flew off, the Harrier that was on the field in front of them flew off also when i got out of the cat to get a little closer.
missed an absolute free one of the male harrier, he was about 30 ft in front of me, sun behind me and on him and i was on AF-S, I heard the beep as i focused and i said beep beep.