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Red-billed tropicbirds rely on extreme aerial agility
红嘴鸏仰赖极其敏捷的飞行技巧
to overcome the many challenges of their life.
克服生命中的挑战
For others, survival demands endurance.
至于其他鸟类要生存 就得坚忍不屈
Every spring, red knots fly 10,000 miles
每年春天 红腹滨鹬要飞上一万六千公里
from their wintering grounds in Argentina
从它们在阿根廷过冬的地方
to their nesting sites in Canada.
飞往加拿大的筑巢地点
The only way they complete this marathon journey
要完成这趟马拉松旅程
is by making a crucial fuel stop here
唯一的办法是在美国东岸
in Delaware Bay, on the east coast of America.
德拉威湾这里 务必要停下来补给
What is most extraordinary is that
最非比寻常的是
as well as having to find their way to this one location,
除了必须设法飞到这个地点
they must also time their arrival to perfection.
抵达的时间还得算得刚刚好
They have a rendezvous with prehistoric creatures emerging from the deep
和海底冒出的史前动物会合
which have hardly changed in 250 million years.
两亿五千万年来 这种动物几乎没变
