I think your statement that "these little guys can be a challenge" is among the greatest understatements I've ever heard! I can not think of a more difficult bird to photograph in flight, and not only that, you have superb results. I would be interested if you were focusing manually, and waited for the bird to fly into focus, or is the camera and lens you use able to auto-focus extremely quickly?~onlybill
Most of the credit goes to the 400 5.6 Canon lens and the Mark 3's fast acquisition speed. I only use centre point with a manual exposure. Oh, and tons of practice - another understatement!