Naaah... I just watched carefully, and when the wings were at their fullest extension I snapped the picture. Oh, sure, and I also taught Ansel Adams most of what he knew about photography.

This photo falls into the category of "lucky", but I guess if you take enough exposures every once in a while one of them works out. I used the on-camera flash for fill, that probably helped a little bit too.

tanstaafl.

edit: Correction. No flash.