migration of cranes to nesting grounds
Refers specifically to the seasonal arrival of cranes at their breeding or nesting areas. Often used in poetic or nature-related contexts.
When spring comes, we welcome the season of the cranes' migration to their nesting grounds.
Compound of 鶴 (tsuru, 'crane') and 来る (kitaru, 'to come'), literally 'cranes come'. The exact historical derivation is uncertain; the spelling is conventionally associated with the seasonal arrival of cranes.