I shot manual using ISO 400 to help stop the motion with a fast shutter speed while holding noise low. The amount of zoom used helps me determines my F-stop as I like good bokeh in the background and like the lens as open as it will go. Even with the zoom at 250 that is 400 equivalent, there was no problem keeping the shutter speed high enough to hold camera shake and wind induced motion to a minimum at 1/2500. I cropped a little keeping the general idea of the image and the various branches that frame the bird.