No wonder people fly halfway around the world, board buses and trains and ferries, and wait patiently in the heavy snow to see these birds gather to preen and flare and dance their wild courtship dances.

• 难怪有人愿意飞越大半个地球，搭公车、火车和渡船前来，耐心地在大雪中守候，只为欣赏这些鹤整理羽毛，展翅跳着热烈的求偶之舞。