我们的星球（2019）

know exactly when they should come back every year.
‎对某些动物来说
Breeding in safety, for some animals
‎安全繁衍的前提是避开兽群
means avoiding crowds.
‎新西兰
New Zealand.
‎是最后一个人类可接触到的宜居之地
The last habitable landmass to be reached by people.
‎为了来到此地
To get here
‎波利尼西亚人 ‎必须跨越几千公里的公海
the Polynesians had to cross thousands of kilometers of open ocean.
‎动物也需要不远千里前来
And so indeed does any animal.
‎尽管如此 每年有一位访客
But nonetheless, one visitor makes a 6,000-kilometer journey
‎会横跨南大洋六千公里
across the Southern Ocean every year
‎来到这座岛屿最为隐秘的角落
to the island's most secluded corners.
‎它既害羞又神秘
It's shy and mysterious.
‎这是峡湾地区的黄眉企鹅
Fiordland's tawaki penguin.
‎又称丛林企鹅
The jungle penguin.
‎企鹅爸爸在照顾它八周大的幼崽
He's looking after his eight-week-old chick
‎此刻 它的另一半正在海里觅食
while his partner is at sea finding food.
‎如果企鹅爸爸做得不够出色 ‎企鹅妈妈可能会抛下它
If he doesn't do so adequately, she might leave him.
‎企鹅的离婚率确实很高
Penguin divorce rates are indeed high!
‎所以企鹅爸爸最好不让其他动物靠近
So he had better keep everyone away.
‎企鹅妈妈在觅食忙活了一天后 ‎回到了海岸
His partner has returned to the coast after a busy day collecting food.
‎但要上岸绝非易事
But getting ashore is not easy.
‎问题在于把握时机
It's a question of timing.
‎差点儿！
Almost!
‎做得很好
Nicely done.
‎为了回到嗷嗷待哺的幼崽身边
To reach her hungry chick
‎企鹅妈妈必须跨过巨石
she has to travel over boulders
‎越过根茎
roots
‎跳过沟壑
and ravines.
‎这就是企鹅风格的外卖♥♥服务
This is Deliveroo, penguin-style.
‎企鹅爸爸只能羡慕地看着
Dad can only watch with envy.
‎随着幼崽的成长 ‎它的食欲也跟着大增
As the chick grows, so too does its appetite.
‎为了满足它们的需求
To keep up with the demand
‎企鹅妈妈必须一次又一次
Mum must complete the obstacle course through the jungle...
‎克服重重障碍
...again
‎穿过树林 来到海里捕食
and again.
‎为了抚养幼崽 ‎它需要走完一场马拉松的距离
To rear her chick, she will walk the distance of a marathon
‎以及游一千多公里
and swim over a thousand kilometers.
‎企鹅妈妈会因此减掉多达一半的体重
And she will lose up to half of her body weight.
‎但这并不能阻止它的步伐
But that doesn't stop her.
‎随后 漫长的十周过去了
And then, after ten long weeks
‎企鹅妈妈终于受够了
she's finally had enough.
‎因为外卖♥♥服务结束了
With the delivery service ended
‎饥肠辘辘的幼崽被迫到海洋觅食
hunger drives the chick to the sea.
‎好在离岸不远处有充足的食物
There's plenty of food to be had just offshore
‎但奇怪的是 它跟着其它企鹅游走了
but strangely, he swims away with others
‎在往南极洲的半路上
and keeps going for thousands of kilometers
‎企鹅幼崽足足游了数千公里
halfway to Antarctica.
‎这是企鹅史上最长的单程旅程
It's the longest single journey made by any penguin
‎而这趟旅程可能毫无意义
and quite possibly pointless.
‎（南极洲）
‎有人认为 ‎企鹅的祖先早在两百万年前
It's thought their ancestors started doing this two million years ago
‎只能在这里觅食的时候 ‎就会这样长距离迁徙了
when their food was only found out here.
‎而这显然是一个难以打破的惯例
And it's clearly been a hard routine to break.
‎在十一月
In November
‎印度洋的日照增加 ‎海水温度因此上升
an increase in the daily sunlight heats the Indian Ocean
‎季风也随之而来
and kick-starts the monsoon.
‎这股季风会途经圣诞岛
In its path lies Christmas Island.
‎它带来的湿度上升 ‎唤醒了沉睡的大军
The rise in humidity it brings awakens a sleeping army.
‎它们就是圣诞岛红蟹
Christmas Island red crabs
‎红蟹现在几乎全在陆上生活
now live almost entirely on land.
‎但要呼吸的话
But to breathe
‎它们的腮部仍需要水分
they still need moisture in their gills
‎并需要在海中产卵
and the sea in which to lay their eggs.
‎因此 在过去的20万年中 ‎红蟹每年都会长途跋涉前去海岸
So they make an annual trek to the coast, as they have done for 200,000 years.
‎然而近来 发生了很多变化
Lately, however, a lot has changed.
‎比如说 红蟹现在身边有帮手了
But help is now at hand.
‎当地人还建造了特殊的桥梁
Local people have also built special bridges
‎这种桥可以让红蟹 ‎不紧不慢地穿过最繁忙的道路
that allow them to cross the busiest roads at their own speed
‎此外 当地人还建立了 ‎给它们指路的地下网络
and a network of subways guides them.
‎红蟹为了赶上涨潮
They increase their pace
‎会加快它们的步伐
for they must catch the high tide.
‎一夜之间 四百万只红蟹来到海岸
In a single night, four million crabs reach the coast.
‎每只雌蟹会在浪花中诞下十万颗卵
Each female shakes 100,000 eggs into the surf.
‎这些卵会立刻孵化为自♥由♥游动的幼体
They hatch immediately and become free-swimming larvae.
‎然而大多数年头 ‎绝大部分幼体会被吃掉
Most years, the vast majority are eaten or washed into the deep
‎或被卷进深海中 有去无回
and none return.
‎但运气好的话 下一个月的涨潮之时
But with luck, on the next month's high tide
‎它们会被冲刷回岛屿的海岸上
they will be swept back to the island's shores.
‎（南大西洋）
‎再往南数千公里处
Thousands of kilometers further south
‎另一次首航即将开始
another first journey is about to begin.
‎在十一月下旬 仲夏时分
Late November
‎于世界的尽头
midsummer, at the end of the world.
‎位于美洲最南端的巴塔哥尼亚
Patagonia, the southernmost tip of the Americas.
‎只有一种大型陆地捕食动物 ‎住在在如此遥远的南边
Only one large land predator lives as far south as this.
‎美洲狮
The puma.
‎它叫马奇托
This is Machito.
‎那只灰色的美洲狮
The gray one.
‎它一岁了 ‎即将要面临一生中最大的考验
He is one year old and about to face the biggest test of his life.
‎然而它并不知道有这回事
Not that he knows it.
‎小雄狮和它的妹妹 妮娜
He and his sister, Niña
‎都到了应该分开的年龄 ‎并各自寻找自己的领地
are at the age where they should separate and each find a territory of their own.
‎然而公狮之间激烈的竞争
Competition between males
‎意味着马奇托 ‎必须比它妹妹走得更远
means Machito will have to travel much further than his sister.
‎但现在它们俩都必须习得狩猎之道
But now, each must learn to hunt.
‎就算是狮子妈妈亲自出马
Even for their mother
‎捕猎一只比它体型大三倍的…
there is no greater challenge...
‎成年公原驼
...than catching an adult bull guanaco
‎也是巨大的挑战
three times her size.
‎但雌狮对捕猎很在行
But she's an expert.
‎此时幼狮们正虎视眈眈
The cubs watch closely.
‎为了成功捕捉猎物 ‎雌狮必须出现在猎物几米距离内
To succeed, she must get within a few meters.
‎而不管猎物做什么挣扎 ‎它都要紧紧抓住对方
And then hold on, no matter how wild the ride.
‎此刻 幼狮应该尽情享用免费的美食
The cubs should make the most of the free meal.
‎它们饭来张口的好日子快结束了
Their easy living is about to come to an end.
‎它们的母亲已经为它们做了 ‎所有力所能及的事
Their mother has done all she can for them.
‎在同居一年后
After a year together
‎狮子妈妈的领地不再是它们的了
her territory is no longer theirs.
‎小狮子是时候离开了
It's time for them to leave.
‎几个星期以来 这对兄妹相依为命
For several weeks, the siblings stay close to each other.
‎尽管如此 它们俩很快就要分别
But they will soon need to go their separate ways.
‎雌狮 妮娜
Niña, the female
‎得以住在离它母亲领地的不远处
will be allowed to live close to her mother's home range.
‎而马奇托没这么好命
Machito will not.
‎因为雄狮的领地要大得多
Male territories are much larger.
‎为了找到足够大的空地
And to find enough space
‎它可能要走数百公里的路
he may have to travel for hundreds of kilometers.
‎这是小雄狮有生以来第一次
For the first time in his life
‎独自在外
he is alone.
‎在迁徙数周后
After weeks on the move
‎小雄狮饿坏了
he is starving.
‎虽然看过母亲捕捉猎物的过程
He's seen how to hunt
‎但它学的知识足够派上用场了吗？
but has he learned enough?
‎显然不够
Not quite.
‎为了找到食物 小雄狮必须一直迁徙
To find food, he must keep moving
‎深入陌生的地带
heading deeper into unfamiliar lands.
‎它会一直前进…
He doesn't stop until...
‎直到确定嗅到的是新鲜猎物的气味
...he picks up the unmistakable scent of a fresh kill.
‎但这股气味…
But it was made...
‎来自一只大雄狮
...by a huge male.
‎这只雄狮的体型是马奇托的两倍大…
He's twice Machito's size...
‎能在几秒内置小雄狮于死地