巣す替がえ

noun

changing nests; moving to a new nest

Used for birds or other animals that relocate to a different nest. Often implies seasonal or breeding-related movement.

• ツバメが巣す替がえをする時じ期きになった。

  It's the season when swallows change nests.

noun

changing one's place of entertainment; moving to a different pleasure spot

Rare, old-fashioned term for moving from one drinking or entertainment establishment to another. Modern Japanese would more commonly use はしご or 場所を変える.

• 昔むかしの遊あそび人にんは、夜よな夜よな巣す替がえを楽たのしんだという。

  It is said that old-time pleasure-seekers enjoyed changing their place of merriment night after night.