the.com/murmuration

means A dense, swirling flock of birds—especially starlings—wheeling through the sky as a single fluid shape, and by extension any crowd of starlings itself.

from Rooted in Latin 'murmur' (a low, continuous sound, like a hum or rumble), 'murmuration' first meant simply the act of murmuring or muttering. English hunting and collective-noun traditions borrowed it by the late medieval period as the whimsical term specifically for a flock of starlings — likely inspired by the soft roar of thousands of wingbeats and chattering calls passing overhead. The sound gave the word its start; the birds' aerial choreography later gave it wings.