Such elegance! Such gracefulness!
I think they're all landing*, slamming on the brakes in the air. The gull comes down feet first, spread apart. The crows are all points; wings here, tail over there, feet and beak forward. You almost expect them to end up head over toes in the sand.
In a second, the gull will look poised and collected, as if he'd never flopped down in that ungainly fashion. The crows will just look like crows.
*The link goes to airplane landing techniques. I think the crows are demonstrating the "Slam Dunk".
I had a line-up of photos prepared, but it's far too late. Sorting takes more time than I would have imagined. I'll post them tomorrow.