I was not sure whether or not to post this. I love the action and was proud of getting this while my tripod laid ground level and I was capturing it while using the LED screen the find the action. The negative for me was not quite having enough DOF to get the upper bird head tack sharp. In hindsight, I wish I wasn't using my TC at this time, but most of the birds were further away until these two flew in. I like many other things about this so thought I would post it and see if it holds up.
A1, 200-600mm (at 531mm), 1.4 TC
1/2500 at f/9
ISO 3200
90% of FF