If you have seen movies like The Lord of the Rings or Harry Potter, and think that this is some kind of magic in the sky. Then you are wrong. This is actually made up by birds. Yes, birds.
These starlings flight in large patterns known as murmurations. For ages, scientists are trying to find out how murmurations work. And what technology do they use to avoid any collision within.
We don’t know how these starlings have managed this kind of wizardry. But away from any science and technology, let them fly, as much as they want.