◆牛は牛づれ、馬は馬づれ Ushi wa ushi-zure, uma wa uma-zure.
- 解釈：類を同じくする物が集まること。似た者同士連れ添えば、上手くゆくというたとえ。
- Literal：A cow is a friend of a cow. A horse is a friend of a horse.
- Interpretation：Birds of a feather flock together. It is the similar things.
- 類義：馬は馬連れ、牛は牛連れ。同気相求む、同類相求む。似た者夫婦。似るを友。類は友を呼ぶ。類を以て集まる。破鍋（われなべ）に閉じ蓋。