This is the kind of grace a duck naturally has that herons seem to lack for the most part. This would be a nice posture for a wood carving. Here you can see the beautiful color of the speculum on the wing, although it has gone to violet rather than cobalt blue.
When filming flocks of birds, the photographer needs to take care not to release the shutter when one of the birds has it's head hidden behind another bird 's body. It is disconcerting to see a body but no head. It is better to wait for complete separation if possible, but it wasn't going to happen with this grouping.
Turtles and Ducks!
I don't normally like photos of birds taken from this perspective. Anyone looking up when a bird flies over is going to see the same thing. There is nothing special about it. I still like it though. It is a nice clear image of the under wing pattern which can be important to identifying ducks in flight. Maybe not close up like this, but at a distance it can be useful.