群むれを成なす

expression, godan verb (-su)

form groups; flock; swarm

Used for animals, people, or things gathering into groups or crowds. Often implies a natural, spontaneous gathering.

• 鳥とりが群むれを成なして南みなみへ飛とんでいく。

  Birds are flying south in flocks.

• 観かん光こう客きゃくが群