Mmm.....Murmuration

Beyond comment or analysis, you might think, but apparently not: these beautiful dances are produced by very simple rules observed by each starling once it is in flocking mode, identical to fish in a shoal, about following while keeping their distance from, the bird to the left: the variations and turns are produced by the birds on the outside of the murmuration, veering after insects, perhaps, or to evade a predatory hawk.

The music is a little annoying though....