Both Osprey and squirrel are entering an unknown world.
无论是鱼鹰还是鼯鼠，都将步入一个未知的世界。
The young squirrel is still very wary.
小鼯鼠还是很谨慎。
But the spreys are poised to take their maiden flights.
而鱼鹰已经准备好开始首次飞行了。
We have lift-off.
有一只起飞了。
The pioneer's success encourages the others.
先驱者的成功是一种鼓励。
Even with plenty of practice, they may not make it.
不过即使经过很多练习它们仍有可能失败。
Just one in ten Osprey chicks survives the journey.
只有十分之一的小鱼鹰能在长途跋涉中幸存下来。

The days grow shorter and the warmth leaves the sun.
白天渐渐变短，太阳渐渐失去了温暖。
Autumn colors the land.
大地染上了秋色。
This is a crucial turning point in the far north.
在遥远的北方，这是重要的转折点。
With winter fast approaching, the animals here will either remain and try to survive the cold or migrate and escape the worst.
冬天在迅速逼近，这里的动物要么留下来尽全力挺过严寒，要么迁徙到别处躲避最糟糕的天气。