The wonder of flock behavior

We've seen our share of birds and they can certainly be amazing, but I've never seen anything like this in real life.  I'd certainly like to.  It seems surrealistic.  I think it is amazing how each individual bird makes local decisions about where to go next, yet the overall behavior of the herd swarm flock really looks as if it is being directed globally.
What you are seeing is a bunch of starlings performing a dance called murmuration.  Apparently scientists haven't been able to fully explain this behavior yet.  All I know is that it is very cool and I'm glad that filmmaker Neels Castillon was there to capture it for us to watch.