I'm aware of that, I was on full manual and was not expecting them to take off. The two were perched with their wings spread on top of a nearby roof, which is how I was planning to shoot them. That was a lucky/unlucky accident, they'd been perched long enough for me to see them, watch them for a minute, go in and find my camera, get change lenses and get my exposure correct. As chance would have it, the second I have my camera pointed at them they decide to take off. The only reason I did anything with that picture is I really like the framing with the wings pointing into opposing corners. Had I expected them to take off I would have gone for 1/1000 at a higher ISO. Ah well, such is life :D