群れ

1. Origins, structure, and basic meaning

• Structure: 群れ, read むれ, means a group of animals of the same kind.
• Basic usage: It is used for birds flying together or a sheepdog guiding sheep.
  • 空を鳥の群れが南へ飛んでいった。

2. Common pitfalls and similar expressions

• Animal-specific words in English
  • The English group word varies with the animal: 鳥の群れ is a flock of birds, while 牛の群れ is a herd of cattle.