Filmmaker Neels Castillon was on a commercial shoot a few days ago, waiting to catch a helicopter flying into a sunset, when suddenly tens of thousands of starlings unexpectedly swarmed the sky in an enormous dance known as a murmuration. With his director of photography, Mathias Touzeris, the two filmed for several minutes capturing some pretty magnificent footage. You might recall a similar murmuration video from last year shot extremely up close and personal using a camera phone that went viral. How do thousands of birds simultaneously make such dramatic changes in their flight patterns? After tons of research, scientists still aren’t sure. The music is Hand-Made by Alt-J.