A group of starlings is known as a murmuration; Alpaca Media caught this shimmering flock in Utrecht, The Netherlands. When a predator is nearby, the starlings will launch in evasive tactics to avoid the threat. As there is safety in numbers, the flock is able to move as one and change direction almost seamlessly.
The result is a seemingly sentient cloud that ripples across the sky. The video is in slow-motion so the viewer can fully appreciate the near psychic abilities of these impressive birds.
Image credit: James Offer, Flickr