Every October, the skies of Britain comes alive with a beautiful, baffling spectacle – starlings swirling in their hundreds and thousands, in shapes that defy mathematical description.
Here’s a National Geographic video of starlings performing their “aerial ballet”
For a scientific explanation of this aerial dance, see http://sciencenordic.com/why-do-starlings-dance-sky
Creatures other than birds also flock together in numbers and formations that are just as mesmerizing.
Locusts are solitary critters but they suddenly turn gregarious as they gather in large numbers. While the patterns they form in flight may not have the twistor shapes of bird flocks, they nevertheless display a formal order individuals spacing that prevents collisions in the density of the packed throng.