How, or indeed why, they perform these marvellous aerobatics, 它们是如何 又是为何成群起舞
Eventually, en masse, they brave the descent 最终 它们会成群结队地降落
So, they wait for others to arrive. 所以它们等候大部队一同抵达
They must return to their roosting trees. 它们必须返回栖息地
In the evening, they come back to the warmth of the city 夜晚 它们在郊外摄食后
Every night, under the cover of darkness they come out to hunt. 在夜色的掩护下 他们每晚都会出来猎食
and the high perches that they need to catch the wind. 鸟巢高度也足够他们乘风飞翔
They're given all the food they can eat. 珍馐佳肴 应有尽有
If they win, one of the challengers 如果他们胜利了 其中一位挑战者