We’re walking upriver with a friend, and a strong south south westerly behind us. From the north west approaches boodalung the pelican, not flapping, but gliding into the wind; he gradually descends down towards the river. And down there we see one, two, three, four at least dolphins moving fast along the western edge of the sandbar; fishing, I assume. The dolphins are spread out, and gradually heading downriver. I look up again and see three more boodalung coming in from the north, flying in formation, gradually descending down onto the water above the sandbar, where they make a watery landing. This happens while the dolphins head steadily downriver along the edge of the sandbar, moving away from a boat that pursues, and past a couple of stationary others, as we head upriver at angles to the wind when the river curves and while the sun sets behind us. 

Our friend is from the north also, and heads back that way tomorrow.