群むれ飛とぶ

godan verb (-bu), intransitive verb

fly in flocks; fly in large numbers

Describes birds, insects, or other flying creatures moving together in a group or swarm.

• 秋あきになると、渡わたり鳥どりが群むれ飛とぶ姿すがたが見みられる。

  In autumn, you can see migratory birds flying in flocks.

• 夕ゆう方がた、無む数すうのコウモリが群むれ飛とんでいた。

  In the evening, countless bats were flying in a swarm.