I saw this immature female (?) on the perimeter of the Celery Farm by Laino Woods on a gray afternoon.
I did not have my good camera, so I walked 1.2 miles home, got my 400mm lens and drove back.
As you can see, the Merlin was still there. Also had a Sharpie (Green Way field) and two Winter Wrens (south of the Butterfly Garden, sputtering loudly...)