murmuration

noun3

1. •
   An act or instance of murmuring.
2. •
   A flock of starlings, in particular when swarming in swirling patterns.

   • "Oh! I wasted most of my morning crawling to a murmuration of starlings, which I foolishly mistook for congregation of plover." — 1893
3. •
   An emergent order in a multi-agent social system.