I had looked at photographing these magnificent flyers as a change both for me and the focus tracking system on my D-80. To my amazement, I was able to track these birds in flight with my 70-210 f4.5-5.6 Nikkor zoom pushed out to the max with an ISO setting of 500.
Last time I did this, my end results were not so good. But the focus points were lighting up in my viewfinder and the camera was picking the birds up. What an amazing day!