I love seeing birds fly like this. As a kid I used to be amazed watching the starlings work their magic but now we hardly see more than 2-3 at any given time if we do see them at all
I have masses of starlings come by my place every evening, they sit in a tree on the next property and yak their little faces off. Then 10 mins later they all take to the sky in waves and head off out to the lake 5 mins away.
In the summer when the branches are heavier with leaves you can't see them as well but you can still hear them they make such a racket!