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.