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Looking down from two miles
above the surface of the Earth,
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00:00:16,595 --> 00:00:22,355
it's impossible not to be impressed
by the sheer grandeur and splendour
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00:00:22,355 --> 00:00:24,675
and power of the natural world.
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00:00:28,275 --> 00:00:31,755
Ten years ago, in a television
series called Planet Earth,
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00:00:31,795 --> 00:00:33,835
we revealed many of those wonders.
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00:00:37,075 --> 00:00:41,915
Planet Earth II brings you even
closer to the lives of animals
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00:00:41,955 --> 00:00:43,155
than ever before.
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00:00:47,355 --> 00:00:50,195
With new technology and new insight,
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00:00:50,195 --> 00:00:54,075
we can show wildlife dramas
in completely new ways.
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00:01:03,635 --> 00:01:07,835
In this programme, we celebrate some
of the highlights of the series.
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00:01:16,915 --> 00:01:19,555
Journeying to every corner
of the globe...
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00:01:23,395 --> 00:01:28,035
..to reveal the extreme lengths
animals go to in order to survive.
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00:01:42,395 --> 00:01:47,115
And we also visit
the newest habitat on Earth -
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00:01:47,155 --> 00:01:48,355
our cities.
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00:01:53,875 --> 00:01:57,555
Now is a crucial time
for the natural world,
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00:01:57,555 --> 00:02:01,795
when our connection with nature
is more important than ever before.
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00:02:04,355 --> 00:02:06,355
This is Planet Earth II.
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00:02:44,595 --> 00:02:45,875
The snow leopard.
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00:02:50,075 --> 00:02:54,595
Seldom seen, the detail of their
lives has long been a mystery.
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00:02:59,475 --> 00:03:04,595
But now, at last, helped by the
latest remote camera technology,
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00:03:04,635 --> 00:03:07,435
we're getting closer to them
than ever before.
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00:03:13,955 --> 00:03:19,755
They are very rare - as few as
four of them in 40 square miles.
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00:03:19,755 --> 00:03:22,835
In the high mountains,
there is simply not enough prey
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00:03:22,835 --> 00:03:23,955
to sustain them.
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00:03:29,115 --> 00:03:31,755
They live solitary lives.
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00:03:31,795 --> 00:03:35,035
Nonetheless, they are well aware of
the presence and the movements
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00:03:35,075 --> 00:03:36,795
of their neighbours,
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00:03:36,835 --> 00:03:40,195
because they leave messages
in a few special places.
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00:03:43,475 --> 00:03:46,195
They rub particular rocks
with their cheeks...
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00:03:49,915 --> 00:03:51,915
..and then spray them with urine.
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00:03:54,955 --> 00:03:58,475
Their two perfumes
create a unique signature.
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00:04:03,675 --> 00:04:08,395
Any other leopard can know which
of its neighbours passed this way
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00:04:08,435 --> 00:04:10,475
without ever making direct contact.
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00:04:43,875 --> 00:04:48,915
Life at extreme altitudes has
shaped some of the toughest animals
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00:04:48,955 --> 00:04:50,155
on the planet.
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00:04:53,995 --> 00:04:57,235
In the Alps, Europe's highest peaks,
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00:04:57,275 --> 00:05:00,195
it is winter
and food is desperately short.
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00:05:13,955 --> 00:05:17,835
A golden eagle has to spend
every daylight hour
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00:05:17,835 --> 00:05:22,315
scanning the slopes for something,
somewhere to eat.
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00:05:32,235 --> 00:05:36,235
Her seven-foot wingspan allows
her to glide effortlessly
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00:05:36,275 --> 00:05:43,155
for 100 miles in a single day.
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00:05:48,035 --> 00:05:52,875
Her extraordinary eyes enable her
to spot prey from two miles away.
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00:06:02,275 --> 00:06:04,875
But she is not the only one
who's looking for food.
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00:06:07,435 --> 00:06:10,355
When she spots a chance,
she must move fast.
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00:06:15,435 --> 00:06:18,115
She can dive at 200mph -
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00:06:18,155 --> 00:06:19,995
only a peregrine is faster.
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00:06:54,315 --> 00:06:58,435
During winter, even eagles rely
almost entirely on carrion.
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00:06:59,995 --> 00:07:03,795
It's a dead fox,
and it could sustain her for days.
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00:07:07,555 --> 00:07:09,275
Other scavengers must defer.
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00:07:12,675 --> 00:07:15,115
The hungry crows
soon regain their courage.
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00:07:18,115 --> 00:07:20,235
They'll try any trick
to steal a morsel.
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00:07:28,675 --> 00:07:30,955
And they are annoyingly persistent.
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00:07:53,075 --> 00:07:55,915
But this mob
are the least of her worries.
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00:08:04,155 --> 00:08:06,035
A bigger eagle takes control.
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00:08:11,475 --> 00:08:14,155
But this kill is
too important to give up.
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00:08:16,755 --> 00:08:18,555
So she must fight.
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00:08:33,555 --> 00:08:36,075
For the moment,
she has won the carcass back...
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00:08:37,715 --> 00:08:41,435
..but a kill like this will attract
every eagle for miles around.
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00:09:09,555 --> 00:09:12,635
As ever, the strongest
wins the lion's share.
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00:09:16,395 --> 00:09:18,795
Unable to defend
the carcass any longer,
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00:09:18,835 --> 00:09:21,595
the first eagle must now
continue its search.
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00:09:23,595 --> 00:09:26,235
It may be many days
before she feeds again.
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00:09:30,075 --> 00:09:33,795
Compared to the sparseness
of the highest mountains,
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00:09:33,835 --> 00:09:36,555
the jungle is full of opportunity.
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00:09:38,315 --> 00:09:39,515
It is Eden.
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00:09:41,955 --> 00:09:45,395
It covers less than
6% of the Earth's surface,
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00:09:45,435 --> 00:09:53,995
but it's home to half of all
the plants and animals on land.
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00:09:58,715 --> 00:10:01,875
The challenge here
is dealing with the competition.
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00:10:08,715 --> 00:10:13,755
And that has driven animals
to do a raft of ingenious things.
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00:10:15,955 --> 00:10:18,795
For some, it is about
trying to stand out.
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00:10:23,515 --> 00:10:27,555
While, for others, the key
to survival is blending in.
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00:10:30,555 --> 00:10:35,035
And these streams in Costa Rica are
home to one of the most remarkable
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00:10:35,035 --> 00:10:36,675
masters of disguise.
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00:10:50,275 --> 00:10:51,755
A glass frog.
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00:10:59,875 --> 00:11:02,595
A male, and tiny.
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00:11:02,635 --> 00:11:04,155
No bigger than your fingernail...
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00:11:05,555 --> 00:11:08,715
..and almost entirely transparent.
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As he needs to be.
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00:11:15,475 --> 00:11:18,995
Almost everything that
walks past here could eat him.
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00:11:20,675 --> 00:11:21,755
Even a cricket.
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00:11:26,955 --> 00:11:31,715
His best chance is to stay
absolutely still and trust
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00:11:31,715 --> 00:11:33,955
that the cricket
looks right through him.
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00:11:55,515 --> 00:11:56,555
Danger passed...
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00:11:58,555 --> 00:12:00,075
..and that's just as well.
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00:12:01,835 --> 00:12:04,795
Because he is a father...
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00:12:08,115 --> 00:12:10,435
..and he is guarding
some very precious eggs.
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00:12:15,115 --> 00:12:18,355
For the last few weeks, females,
one after the other,
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00:12:18,395 --> 00:12:21,515
have visited him and
entrusted him with their offspring.
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00:12:25,195 --> 00:12:27,595
Some are now almost ready to hatch.
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00:12:31,915 --> 00:12:35,555
There are several clutches
on the leaf, and those at the top,
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00:12:35,555 --> 00:12:38,755
the most recently laid,
are barely a day old.
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00:12:45,035 --> 00:12:48,435
But, in the jungle, there is
always someone out to get you.
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00:12:54,835 --> 00:12:59,155
This wasp is a specialist
hunter of frogs' eggs.
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00:13:01,235 --> 00:13:05,195
It has noticed the wriggling
tadpoles at the bottom of the leaf.
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00:13:11,355 --> 00:13:13,635
He mustn't move.
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00:13:13,635 --> 00:13:16,515
The youngest eggs
are the most vulnerable,
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and he can't guard them all.
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00:13:38,315 --> 00:13:41,715
But these tadpoles are not
as helpless as they might appear.
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00:13:50,075 --> 00:13:55,675
Incredibly, the unhatched tadpoles
can sense danger and the oldest
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and strongest wriggle free
and drop into the stream below.
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00:14:17,475 --> 00:14:19,915
The eggs at the top
of the leaf, however,
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00:14:19,955 --> 00:14:21,955
are still too young to hatch...
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00:14:24,075 --> 00:14:26,275
..and now the wasps
know they're there.
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00:14:30,435 --> 00:14:39,395
But the male's back looks very like
the youngest cluster of eggs...
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00:14:39,435 --> 00:14:41,755
..and that seems
to confuse the wasps.
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00:15:04,395 --> 00:15:08,715
Using his own body as a decoy
is a huge risk.
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00:15:08,755 --> 00:15:10,675
The wasps' stings could kill him.
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00:15:38,915 --> 00:15:41,835
He has managed to save
most of his young.
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00:15:46,395 --> 00:15:49,915
He'll have to remain on guard
for another two weeks.
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00:15:51,475 --> 00:15:56,275
But, in the jungle, just surviving
the day can count as a success.
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00:16:05,075 --> 00:16:07,955
Jungles are the
richest places on Earth,
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because of one remarkable fact.
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00:16:13,395 --> 00:16:15,075
They make their own weather.
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00:16:21,155 --> 00:16:25,395
Every day, water rises from the
surface of the leaves as vapour.
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00:16:27,995 --> 00:16:30,915
It's as if the trees
breathe out clouds.
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00:16:34,035 --> 00:16:37,035
They gather over the forest,
until finally...
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00:16:40,075 --> 00:16:41,275
..they burst.
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00:16:55,955 --> 00:16:59,235
Rain is the lifeblood
of every jungle...
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00:17:09,275 --> 00:17:12,915
..and all have to do their best
to endure the daily downpour.
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00:17:52,675 --> 00:17:55,995
In some jungles,
like here in Brazil,
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00:17:55,995 --> 00:18:00,155
it rains so much that,
for part of the year, the trees
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00:18:00,195 --> 00:18:01,955
are almost totally submerged.
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00:18:07,675 --> 00:18:13,595
This is a mysterious world, a place
few people have ever explored.
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00:18:17,115 --> 00:18:22,315
Here, 1,000 miles from the sea,
are dolphins.
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00:18:26,555 --> 00:18:31,475
A newly-identified species of river
dolphin found nowhere else on Earth.
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00:18:39,835 --> 00:18:42,955
At the shallow margins
of the flooded jungle,
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00:18:42,995 --> 00:18:46,435
food is so abundant
it supports giants.
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00:18:49,755 --> 00:18:52,355
Capybara - the biggest
rodents in the world.
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00:18:57,315 --> 00:18:59,755
Giant otters, the size of a man.
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00:19:04,955 --> 00:19:06,835
And the rulers of these rivers...
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00:19:08,395 --> 00:19:09,515
..caiman.
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00:19:11,435 --> 00:19:13,755
They grow to 10 feet long
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00:19:13,795 --> 00:19:16,355
and kill anything they get
between their jaws.
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00:19:21,195 --> 00:19:24,315
But there are more artful hunters,
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00:19:24,355 --> 00:19:26,755
drawn here from
the surrounding forest.
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00:19:39,195 --> 00:19:42,675
A jaguar -
the supreme jungle predator.
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00:20:01,315 --> 00:20:04,035
Capybara are strong and wary.
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00:20:07,635 --> 00:20:09,475
The key is stealth.
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00:20:28,555 --> 00:20:32,275
She needs to get within a metre
if she is to pounce.
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00:20:55,235 --> 00:20:56,275
Not this time.
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00:21:07,235 --> 00:21:15,355
She's not the only female here.
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00:21:26,315 --> 00:21:35,195
Few places on Earth have enough food
to support so many big cats.
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00:21:57,195 --> 00:21:59,555
The male hunts in a different way.
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00:22:06,875 --> 00:22:11,155
Weighing over 130 kilos,
it's hard to be stealthy.
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00:22:14,515 --> 00:22:17,715
And with so many other
jaguars around,
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00:22:17,755 --> 00:22:20,115
he doesn't bother
with wary capybara.
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00:22:26,635 --> 00:22:28,755
He seeks a different prey.
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00:22:52,035 --> 00:22:53,235
He's become a killer...
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00:22:55,115 --> 00:22:56,115
..of killers.
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00:23:22,155 --> 00:23:25,755
Jaguars have the most powerful bite
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00:23:25,755 --> 00:23:26,995
of any cat.
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00:23:30,595 --> 00:23:33,115
And he knows the caiman's
most vulnerable point.
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00:23:35,755 --> 00:23:37,115
The back of its skull.
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00:24:00,555 --> 00:24:05,275
For some, isolation has provided
an escape from the competition.
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00:24:28,195 --> 00:24:31,915
The tiny island of Escudo,
off the coast of Panama.
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00:24:34,555 --> 00:24:37,875
Home to the pygmy three-toed sloth.
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00:24:41,915 --> 00:24:45,315
This is a male,
and life here suits him well.
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00:24:48,715 --> 00:24:52,675
Mangroves provide
all the leaves he can eat,
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00:24:52,715 --> 00:24:54,995
and there are no predators
to worry him.
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00:24:57,635 --> 00:25:02,435
Island life may seem idyllic,
but it comes at a price.
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00:25:04,195 --> 00:25:07,675
There are only a few hundred
pygmy sloths in existence...
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00:25:09,155 --> 00:25:11,155
..and he needs a mate.
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00:25:13,675 --> 00:25:15,995
HIGH-PITCHED SQUEAL
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00:25:15,995 --> 00:25:17,835
That is an enticing call...
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00:25:20,115 --> 00:25:21,075
..from a female...
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00:25:23,955 --> 00:25:25,755
..somewhere, out there.
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00:25:56,195 --> 00:25:59,835
The problem is
there's deep water between them.
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00:26:01,675 --> 00:26:04,835
So what should any
red-blooded sloth do?
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00:26:10,075 --> 00:26:11,235
Swim, of course.
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00:26:42,275 --> 00:26:48,635
Could this be her?
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00:26:50,995 --> 00:26:54,395
He does his best
to put on a turn of speed.
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00:27:04,915 --> 00:27:07,075
But she's not the one.
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00:27:07,115 --> 00:27:09,035
She already has a baby,
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00:27:09,075 --> 00:27:12,035
and she won't mate again
until it leaves her
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00:27:12,035 --> 00:27:13,995
in about six months' time.
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00:27:21,195 --> 00:27:25,395
Even life on a paradise island
can have its limitations.
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00:27:37,115 --> 00:27:40,275
Islands can be sanctuaries
for wildlife,
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00:27:40,315 --> 00:27:43,635
but that doesn't mean
that life is easy.
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00:27:43,675 --> 00:27:46,675
Some can be very
challenging places indeed.
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00:28:01,715 --> 00:28:04,835
There are islands
still forming today,
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00:28:04,835 --> 00:28:06,915
built by volcanoes.
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00:28:10,515 --> 00:28:12,395
Some erupt explosively.
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00:28:19,475 --> 00:28:23,555
Others pour out rivers
of molten rock -
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00:28:23,595 --> 00:28:24,555
lava.
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00:28:30,835 --> 00:28:35,115
In the last 50 years, ten new
volcanic islands have been formed.
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00:29:02,555 --> 00:29:07,515
Young volcanic islands
can be tough places to survive.
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00:29:12,075 --> 00:29:16,195
This is Fernandina, one of the
Galapagos Islands in the Pacific.
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00:29:19,995 --> 00:29:25,315
It is a desolate place, but the
surrounding sea is rich with life.
191
00:29:28,795 --> 00:29:33,235
And the frontier between these two
very different worlds is the home
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00:29:33,235 --> 00:29:35,435
of one of the strangest of reptiles.
193
00:29:39,795 --> 00:29:41,755
Seagoing iguanas.
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00:29:45,395 --> 00:29:47,355
They are vegetarians,
195
00:29:47,355 --> 00:29:50,035
but since there is little food
for them on land,
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00:29:50,035 --> 00:29:52,995
marine iguanas graze
on the sea floor.
197
00:29:55,675 --> 00:30:01,115
A big male like this one can dive
to 30 metres and hold his breath
198
00:30:01,155 --> 00:30:02,235
for half an hour.
199
00:30:27,075 --> 00:30:33,715
It is an incredible adaptation
that allows them to survive
200
00:30:40,835 --> 00:30:43,795
And by bringing nutrients
from the sea to the land,
201
00:30:43,795 --> 00:30:46,955
the iguanas help other animals
to survive here, too.
202
00:30:51,035 --> 00:30:54,235
Crabs feed on dead skin
on the iguanas' back,
203
00:30:54,275 --> 00:30:58,195
and in turn provide
a welcome exfoliation service.
204
00:31:06,355 --> 00:31:09,995
While smaller lizards prey on
the flies that pester the colony.
205
00:31:32,635 --> 00:31:36,875
But not all the relationships
on this island are so harmonious.
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00:31:43,555 --> 00:31:46,235
Marine iguanas lay their eggs
in sand.
207
00:31:48,715 --> 00:31:52,515
In June, when the hatchlings emerge,
they are vulnerable.
208
00:31:56,755 --> 00:32:00,155
They must join the adults
at the edge of the sea,
209
00:32:00,195 --> 00:32:02,475
but the journey
will be a dangerous one.
210
00:32:27,755 --> 00:32:29,155
Racer snakes.
211
00:32:58,915 --> 00:33:00,955
The snakes missed their chance.
212
00:33:09,355 --> 00:33:11,315
But more babies are hatching...
213
00:33:16,955 --> 00:33:21,075
..and now the snakes
are on the alert.
214
00:33:21,115 --> 00:33:24,915
This is the best feeding opportunity
they will get all year.
215
00:33:40,955 --> 00:33:45,275
On flat ground, a baby iguana
can outrun a racer snake...
216
00:33:47,115 --> 00:33:48,955
..but others are waiting in ambush.
217
00:34:16,995 --> 00:34:21,275
Another hatchling has its first
glimpse of a dangerous world.
218
00:35:19,315 --> 00:35:21,235
A snake's eyes aren't very good...
219
00:35:22,555 --> 00:35:24,395
..but they can detect movement.
220
00:35:26,315 --> 00:35:30,355
So if the hatchling keeps its nerve,
it may just avoid detection.
221
00:37:02,715 --> 00:37:04,515
A near-miraculous escape.
222
00:37:11,675 --> 00:37:15,875
The lucky survivors can begin
learning the unique way of life
223
00:37:15,875 --> 00:37:18,115
demanded by this hostile island.
224
00:37:28,115 --> 00:37:30,835
There are habitats on Earth
225
00:37:30,875 --> 00:37:33,315
where food seems abundant.
226
00:37:38,235 --> 00:37:42,875
One quarter of the land on Earth
is covered by a single remarkable
227
00:37:42,875 --> 00:37:44,035
type of plant.
228
00:37:45,995 --> 00:37:46,995
Grass.
229
00:37:55,195 --> 00:37:58,155
It can be tall enough
to hide a giant...
230
00:38:05,755 --> 00:38:08,355
..and the world it creates
is unique.
231
00:38:23,675 --> 00:38:25,355
These are the good times.
232
00:38:27,155 --> 00:38:28,675
But in just a few months,
233
00:38:28,715 --> 00:38:33,275
the animals will be forced
to move on in search of new growth.
234
00:38:38,315 --> 00:38:42,875
For tiny animals, the summer boom
brings opportunity
235
00:38:42,875 --> 00:38:44,115
to their doorstep.
236
00:38:47,675 --> 00:38:51,115
An excellent time to build
a tiny treehouse...
237
00:38:53,355 --> 00:38:54,515
..for a harvest mouse.
238
00:39:08,595 --> 00:39:12,395
During summer, European
meadow lands are full of food.
239
00:39:16,195 --> 00:39:18,155
But only for those
that can reach it.
240
00:39:36,915 --> 00:39:39,835
Climbing grass is harder
than climbing trees,
241
00:39:39,875 --> 00:39:42,995
not least because their stems
just won't stay still.
242
00:39:50,835 --> 00:39:54,115
A prehensile tail
acts like a fifth limb,
243
00:39:54,155 --> 00:39:57,755
so she's as agile as a monkey
clambering around in a tree.
244
00:40:06,155 --> 00:40:10,195
And just as well, for the best food
in this tiny forest
245
00:40:10,235 --> 00:40:12,075
is at the very top of its canopy.
246
00:40:22,835 --> 00:40:25,435
Feeding up here, she is exposed.
247
00:40:33,035 --> 00:40:34,155
A barn owl.
248
00:41:05,115 --> 00:41:06,715
Not her finest move...
249
00:41:10,675 --> 00:41:11,875
..but it did the trick.
250
00:41:14,195 --> 00:41:17,475
Harvest mice seldom go
all the way down to the ground.
251
00:41:20,915 --> 00:41:24,115
It's a tangled
and dangerous world down here.
252
00:41:37,515 --> 00:41:41,555
But she can read the pattern
of the stems overhead like a map...
253
00:41:42,755 --> 00:41:44,515
..and so find her way home.
254
00:41:52,715 --> 00:41:54,795
And not a minute too soon.
255
00:41:59,715 --> 00:42:01,675
There are mouths to feed.
256
00:42:15,355 --> 00:42:17,355
Her babies must fatten up quickly.
257
00:42:19,755 --> 00:42:23,195
They need to harvest the summer
grasses while they are still
258
00:42:23,195 --> 00:42:24,315
rich with food.
259
00:42:33,555 --> 00:42:35,915
On the grasslands of Africa,
260
00:42:35,955 --> 00:42:40,275
Jackson's widowbirds
seek out fresh stems
261
00:42:40,315 --> 00:42:42,115
with a different purpose in mind.
262
00:42:48,195 --> 00:42:50,195
This male wants a mate.
263
00:42:53,515 --> 00:42:56,635
He has grown elaborate
breeding plumage for this moment...
264
00:42:58,595 --> 00:43:01,235
..but he needs a stage
on which to show it off.
265
00:43:05,835 --> 00:43:10,995
By carefully selecting grass blades,
each trimmed to the correct length,
266
00:43:10,995 --> 00:43:12,995
he is creating
something very special.
267
00:43:27,795 --> 00:43:29,875
He needs an even surface...
268
00:43:32,395 --> 00:43:33,715
..and a centrepiece.
269
00:43:36,515 --> 00:43:37,995
The stage is set.
270
00:43:39,235 --> 00:43:43,435
His bachelor pad is sufficiently
neat and tidy to attract a female.
271
00:43:45,555 --> 00:43:48,355
The problem is, can she see it?
272
00:43:52,435 --> 00:43:53,435
He has competition.
273
00:44:03,835 --> 00:44:07,915
It might take more than a little
gardening to impress the ladies.
274
00:44:10,435 --> 00:44:12,115
Jumping is the right idea...
275
00:44:13,555 --> 00:44:15,595
..but he has misjudged
the height of the grass.
276
00:44:25,875 --> 00:44:27,755
His rival makes it look easy.
277
00:44:50,995 --> 00:44:52,955
Time to raise his game.
278
00:45:28,675 --> 00:45:31,475
It's not only who jumps the highest,
279
00:45:31,475 --> 00:45:34,275
but who can keep doing so
the longest.
280
00:45:42,675 --> 00:45:46,955
Unable to go the distance,
his rivals drop out, one by one.
281
00:45:51,875 --> 00:45:55,115
Stamina has won him admirers.
282
00:45:56,555 --> 00:45:59,915
Now he can show off
his courtship arena.
283
00:46:09,075 --> 00:46:12,475
And engage in a little romantic
hide and seek.
284
00:46:24,595 --> 00:46:28,355
Finally, he's done enough.
285
00:46:35,915 --> 00:46:38,395
The seasonality of the grassland
286
00:46:38,435 --> 00:46:42,275
means the time of opportunity is
swiftly followed
287
00:46:42,275 --> 00:46:43,915
by times of hardship.
288
00:46:46,835 --> 00:46:50,555
In winter, the prairies
of North America freeze.
289
00:46:53,995 --> 00:46:56,635
60 million tonnes of snow
290
00:46:56,675 --> 00:46:59,515
now blanket
this herd of bison's territory.
291
00:47:01,955 --> 00:47:05,795
Pushing through the drifts is
exhausting work,
292
00:47:05,835 --> 00:47:08,555
and the bison are now
slowly starving.
293
00:47:14,875 --> 00:47:18,115
Just keeping warm saps
huge amounts of energy.
294
00:47:24,475 --> 00:47:28,235
Their thick coats can insulate them
down to minus 20 Fahrenheit.
295
00:47:29,435 --> 00:47:31,115
It is now minus 40.
296
00:47:34,475 --> 00:47:36,995
The only thing
that will keep them alive
297
00:47:37,035 --> 00:47:39,955
is buried beneath
three feet of snow.
298
00:47:44,835 --> 00:47:48,075
And that's a problem shared
with a surprising neighbour.
299
00:48:06,115 --> 00:48:09,435
The food the fox seeks is
also deep beneath the snow.
300
00:48:22,075 --> 00:48:24,355
The survival of both creatures
301
00:48:24,355 --> 00:48:26,795
depends on getting through
to the ground.
302
00:48:32,315 --> 00:48:35,355
For the bison, it will be
a matter of brute strength.
303
00:48:40,475 --> 00:48:43,915
Their lightweight neighbour
needs more precision.
304
00:49:08,795 --> 00:49:13,915
The bison have reached their goal -
a mouthful of withered grass.
305
00:49:17,955 --> 00:49:22,275
And where the bison have dug,
the fox now spots an opportunity.
306
00:49:31,315 --> 00:49:33,315
Every footstep counts.
307
00:49:36,355 --> 00:49:37,715
But he mustn't break through...
308
00:49:38,955 --> 00:49:39,955
..yet.
309
00:49:43,315 --> 00:49:46,435
He listens carefully
to pinpoint his target.
310
00:49:52,435 --> 00:49:53,435
It's moving.
311
00:50:15,075 --> 00:50:15,995
A vole.
312
00:50:18,555 --> 00:50:24,035
Small, but 100 times more nutritious
than a mouthful of dried grass.
313
00:50:30,715 --> 00:50:34,195
To get through the winter
on these prairies,
314
00:50:34,235 --> 00:50:36,635
sometimes brain beats brawn.
315
00:50:43,355 --> 00:50:48,195
Seasonal change brings the
transformation of the landscape
316
00:50:48,235 --> 00:50:49,595
to more than just the grasslands.
317
00:50:51,275 --> 00:50:55,715
In America, the spring melt turns
the slopes of the Rocky Mountains
318
00:50:55,755 --> 00:50:57,555
from white to green.
319
00:51:20,315 --> 00:51:22,555
Meadows that only a few weeks ago
320
00:51:22,555 --> 00:51:26,235
were buried deep beneath the snow
are now full of life.
321
00:51:41,875 --> 00:51:45,075
Bears have emerged
from their winter dens.
322
00:51:49,395 --> 00:51:50,755
It's becoming warmer,
323
00:51:50,795 --> 00:51:53,795
and they are keen to shed
their thick winter coats.
324
00:51:57,355 --> 00:52:00,795
Mothers show their cubs
what to do about this.
325
00:52:10,995 --> 00:52:12,155
They'll soon catch on.
326
00:52:15,515 --> 00:52:19,195
Some trees, it seems, are
particularly suitable for rubbing.
327
00:52:20,675 --> 00:52:22,435
Bears have their favourites,
328
00:52:22,475 --> 00:52:25,075
and will travel long distances
to visit them.
329
00:52:28,395 --> 00:52:31,075
Some itches
just have to be scratched.
330
00:52:52,475 --> 00:52:56,195
There are now 30 bears
in this one valley.
331
00:53:02,795 --> 00:53:07,795
As they rub, each leaves an
individual and recognisable scent.
332
00:53:11,635 --> 00:53:14,915
So the tree soon carries
a list of who's around...
333
00:53:16,075 --> 00:53:18,555
..which might help individuals
to avoid a fight.
334
00:53:20,555 --> 00:53:23,195
To best spread their scent,
335
00:53:23,195 --> 00:53:25,435
they really have
to put their back into it.
336
00:54:07,515 --> 00:54:09,755
But the summer is short.
337
00:54:09,795 --> 00:54:14,595
Itches satisfactorily scratched,
it's time to eat.
338
00:54:23,435 --> 00:54:25,795
Dawn in the high Andes.
339
00:54:29,035 --> 00:54:33,315
Here, too, the sun's warmth
brings rapid relief.
340
00:54:37,995 --> 00:54:40,195
Mountain viscacha are up early
341
00:54:40,235 --> 00:54:44,075
to claim the best places
to catch the sun's first rays.
342
00:55:05,955 --> 00:55:10,275
For others up here,
the sunrise is even more welcome.
343
00:55:13,435 --> 00:55:15,675
At over 4,000 metres,
344
00:55:15,715 --> 00:55:18,715
this is the highest flamingo colony
in the world.
345
00:55:21,435 --> 00:55:25,915
At night, it gets so cold that even
this salty water freezes over.
346
00:55:28,755 --> 00:55:30,995
And now the flamingos
are trapped in the ice.
347
00:55:37,075 --> 00:55:39,715
Eventually, the sun thins the ice.
348
00:55:40,875 --> 00:55:44,075
But it's still a struggle for
the flamingos to break free.
349
00:56:04,915 --> 00:56:07,515
Walking on thin ice is always risky.
350
00:56:19,035 --> 00:56:21,395
And it's hard
to retain one's dignity.
351
00:56:23,035 --> 00:56:25,235
Especially when
you're wearing stilts.
352
00:56:38,675 --> 00:56:40,475
At these altitudes,
353
00:56:40,515 --> 00:56:45,675
the sun's power can quickly turn
from salvation to threat.
354
00:56:52,035 --> 00:56:54,235
The atmosphere is so thin,
355
00:56:54,275 --> 00:56:57,675
there is very little protection
from ultraviolet radiation.
356
00:56:59,395 --> 00:57:03,075
By mid-morning, it's risky
to linger out in the open.
357
00:57:06,675 --> 00:57:09,475
The viscacha are forced
to head for the shade.
358
00:57:14,715 --> 00:57:17,755
Out on the lake,
there is nowhere to hide.
359
00:57:24,195 --> 00:57:28,435
The white crust of the soda lake
reflects the sun's glare,
360
00:57:28,435 --> 00:57:31,515
and increases the impact
of its ultraviolet rays.
361
00:57:36,835 --> 00:57:40,955
By midday, uncovered human skin
will burn in four minutes.
362
00:57:47,075 --> 00:57:49,635
But this doesn't seem
to bother the flamingos.
363
00:57:50,915 --> 00:57:53,115
In fact, they are on parade.
364
00:58:23,235 --> 00:58:25,035
During the breeding season,
365
00:58:25,075 --> 00:58:28,475
flamingos perform
these bizarre courtship dances,
366
00:58:28,515 --> 00:58:30,555
even through
the hottest time of the day.
367
00:58:37,835 --> 00:58:40,915
They are so eager,
they don't even pause to feed.
368
00:58:59,595 --> 00:59:02,395
The rules are something
of a mystery.
369
00:59:02,435 --> 00:59:06,355
But after a month of dancing,
all the birds will have paired off
370
00:59:06,395 --> 00:59:08,515
and will be getting ready to mate.
371
00:59:15,235 --> 00:59:19,475
Up here, there are few other
creatures to bother the flamingos,
372
00:59:19,475 --> 00:59:23,635
but then, few other creatures could
even tolerate these conditions.
373
00:59:28,435 --> 00:59:31,515
Such extreme habitats
require wildlife
374
00:59:31,555 --> 00:59:34,235
to be extraordinarily resilient.
375
00:59:38,955 --> 00:59:41,355
And nowhere more so
than in the desert.
376
00:59:45,275 --> 00:59:48,795
With temperatures reaching
almost 50 degrees Celsius,
377
00:59:48,835 --> 00:59:51,595
there's no escape
from the scorching sun,
378
00:59:51,595 --> 00:59:52,995
the wind and the dust.
379
01:00:15,755 --> 01:00:19,915
This is the oldest desert
in the world -
380
01:00:19,955 --> 01:00:22,395
the Namib, in south-west Africa.
381
01:00:24,075 --> 01:00:27,115
It's been dry for 55 million years.
382
01:00:32,635 --> 01:00:36,395
Life here, for the hunter,
is as hard as it gets.
383
01:00:47,275 --> 01:00:49,675
A pride of lions.
384
01:00:49,675 --> 01:00:51,795
One of the very few that endures
385
01:00:51,835 --> 01:00:55,675
this desert's scorching temperatures
and lack of water.
386
01:01:26,675 --> 01:01:29,195
A dry riverbed on the edge
of their territory.
387
01:01:32,955 --> 01:01:35,075
The only animals here are giraffe.
388
01:01:36,475 --> 01:01:40,755
But these one-ton giants could kill
a lion with a single kick.
389
01:01:54,155 --> 01:01:57,315
Lions seldom tackle
such formidable prey...
390
01:02:00,515 --> 01:02:04,835
..but this pride can't go on
much longer without food.
391
01:02:33,355 --> 01:02:36,395
The whole pride must work together
as a team if they're to succeed.
392
01:03:05,595 --> 01:03:07,995
Two lionesses lead the chase.
393
01:03:08,035 --> 01:03:10,755
Others race to cut off
possible escape routes.
394
01:03:27,795 --> 01:03:31,835
The giraffe has the speed
and stamina to outrun the pride.
395
01:03:34,635 --> 01:03:36,435
But it's being chased into a trap.
396
01:03:39,115 --> 01:03:41,515
Up ahead, the lead female waits.
397
01:03:52,115 --> 01:03:54,155
It's now up to her.
398
01:04:13,395 --> 01:04:15,875
Most lion hunts end in failure.
399
01:04:17,875 --> 01:04:22,395
But no lions fail more often than
those that live in the desert.
400
01:04:29,635 --> 01:04:33,195
In the land where food and water is
so limited,
401
01:04:33,235 --> 01:04:35,515
competition can be intense.
402
01:04:38,995 --> 01:04:43,155
It's July in Nevada
in the Western United States.
403
01:04:45,195 --> 01:04:46,995
The hottest time of the year.
404
01:05:00,155 --> 01:05:02,915
Bands of wild horses, mustang,
405
01:05:02,955 --> 01:05:07,035
are converging on one of the last
remaining waterholes for miles.
406
01:05:12,755 --> 01:05:16,835
Now, water not only offers them
the chance to drink.
407
01:05:16,835 --> 01:05:18,875
It can also bring power.
408
01:05:22,035 --> 01:05:25,155
If a stallion can control
access to water,
409
01:05:25,195 --> 01:05:28,155
he will secure mating rights
to the entire herd.
410
01:05:30,115 --> 01:05:32,835
So, stallions try to dominate
these pools,
411
01:05:32,875 --> 01:05:35,515
fighting off rivals
who venture too close.
412
01:05:48,835 --> 01:05:49,875
A stranger.
413
01:05:51,755 --> 01:05:54,195
He has travelled ten miles
to be here,
414
01:05:54,195 --> 01:05:57,195
because the pools where he's come
from have already dried up.
415
01:06:01,635 --> 01:06:03,635
With him come his females.
416
01:06:06,275 --> 01:06:09,275
If he can't provide them with water,
they will leave him
417
01:06:09,275 --> 01:06:12,995
for the white stallion
who already dominates this pool.
418
01:06:23,635 --> 01:06:25,675
So, he will have to fight.
419
01:07:26,235 --> 01:07:27,715
There is everything to lose.
420
01:07:29,715 --> 01:07:33,915
A broken leg or a shattered jaw
would mean a slow and painful death.
421
01:07:55,235 --> 01:07:58,275
A missed kick and it's all over.
422
01:08:00,915 --> 01:08:02,675
The new arrival has won.
423
01:08:05,155 --> 01:08:09,355
And his prize is more than just
a chance to drink.
424
01:08:09,395 --> 01:08:12,515
He has provided for his herd
and, in the process,
425
01:08:12,515 --> 01:08:14,395
stolen his rival's females.
426
01:08:16,635 --> 01:08:18,955
The white stallion's rule is over.
427
01:08:31,635 --> 01:08:33,275
When rain does come,
428
01:08:33,315 --> 01:08:36,955
it has the power to bring life
to even the desert.
429
01:08:55,595 --> 01:08:59,235
And no creature exploits
the greening of the land
430
01:08:59,235 --> 01:09:03,955
more quickly or more
dramatically than a locust.
431
01:09:12,395 --> 01:09:14,435
Madagascar's arid south-west
432
01:09:14,475 --> 01:09:17,275
has received its highest rainfall
in years.
433
01:09:23,595 --> 01:09:25,555
Now an army is on the march,
434
01:09:25,595 --> 01:09:29,075
attracted by the smell
of newly-sprouting grass.
435
01:09:41,475 --> 01:09:43,955
Locusts are normally
solitary creatures,
436
01:09:43,995 --> 01:09:47,795
but when food becomes suddenly
plentiful, they come together
437
01:09:47,795 --> 01:09:52,235
into an unstoppable force that
devours everything in its path.
438
01:10:10,675 --> 01:10:14,835
But this devastation is
about to get a lot worse.
439
01:10:26,715 --> 01:10:30,555
The locusts now transform
into winged adults.
440
01:10:31,635 --> 01:10:33,715
And with conditions as good as this,
441
01:10:33,755 --> 01:10:36,315
they do so three times faster
than normal.
442
01:10:38,475 --> 01:10:41,115
Now they are
at their most voracious.
443
01:10:42,795 --> 01:10:45,635
And with wings,
they can take to the skies.
444
01:11:10,835 --> 01:11:14,875
Once airborne, the locusts can
travel over 60 miles a day
445
01:11:14,915 --> 01:11:17,955
in their search
for new feeding grounds.
446
01:11:31,755 --> 01:11:36,075
A super swarm of this scale
may only appear once in a decade.
447
01:11:37,475 --> 01:11:40,435
This one extends
over 200 square miles
448
01:11:40,475 --> 01:11:49,835
and contains
several billion individuals.
449
01:12:25,675 --> 01:12:28,715
Nothing can strip a land
of its vegetation
450
01:12:28,755 --> 01:12:32,795
with such speed and thoroughness
as a plague of locusts.
451
01:12:35,955 --> 01:12:39,395
When the food eventually runs out,
the whole army will die.
452
01:12:40,995 --> 01:12:43,235
But not before
it's devastated the land.
453
01:12:54,955 --> 01:12:56,795
In the last 6,000 years,
454
01:12:56,795 --> 01:12:59,115
a new habitat has appeared,
455
01:12:59,155 --> 01:13:04,795
entirely designed and constructed
by one species for its own purpose.
456
01:13:08,075 --> 01:13:12,675
We humans create homes
for ourselves, cities -
457
01:13:12,715 --> 01:13:16,155
with consequences for wildlife,
good and bad.
458
01:13:19,635 --> 01:13:21,795
Rome in December.
459
01:13:21,835 --> 01:13:24,435
Visitors are drawn in
by the city's heat.
460
01:13:26,315 --> 01:13:28,115
And they're leaving their mark.
461
01:13:31,435 --> 01:13:33,435
In a single winter's day,
462
01:13:33,475 --> 01:13:37,115
ten tonnes of its droppings
rain down on the city.
463
01:13:44,555 --> 01:13:45,435
Starlings.
464
01:13:48,915 --> 01:13:51,715
In the evening, they come back
to the warmth of the city
465
01:13:51,755 --> 01:13:53,915
after feeding
in the neighbouring countryside.
466
01:13:57,115 --> 01:14:00,475
They must return
to their roosting trees,
467
01:14:00,475 --> 01:14:01,955
but the first to do so are
468
01:14:01,955 --> 01:14:11,475
at the highest risk of being caught
by birds of prey.
469
01:14:12,635 --> 01:14:13,995
There's safety in numbers.
470
01:14:16,955 --> 01:14:18,435
As daylight fades,
471
01:14:18,475 --> 01:14:22,795
the sky fills with a staggering
one million starlings.
472
01:14:25,675 --> 01:14:30,435
And then follows one
of Nature's great spectaculars.
473
01:15:17,235 --> 01:15:19,595
we still do not fully understand.
474
01:15:30,675 --> 01:15:32,795
Eventually, en masse,
475
01:15:32,835 --> 01:15:37,195
they brave the descent and fill the
branches of their favourite trees.
476
01:15:42,555 --> 01:15:44,435
On these cold winter nights,
477
01:15:44,475 --> 01:15:49,035
the city's extra warmth can mean the
difference between life and death.
478
01:16:02,715 --> 01:16:07,395
For the bold, this new world
can offer other opportunities.
479
01:16:13,595 --> 01:16:18,955
But to compete with humanity
takes intelligence and nerve.
480
01:16:23,955 --> 01:16:26,915
One enterprising species of monkey
481
01:16:26,915 --> 01:16:30,595
has moved into the city
of Jaipur in India.
482
01:16:33,875 --> 01:16:34,955
The Rhesus macaque.
483
01:16:39,995 --> 01:16:43,555
But how to get a share
of all this juicy fruit?
484
01:16:52,195 --> 01:16:53,275
Every morning,
485
01:16:53,315 --> 01:16:57,395
the troop make the same journey
through the urban jungle,
486
01:16:57,395 --> 01:16:59,195
just as human commuters do.
487
01:17:22,075 --> 01:17:25,635
Sometimes, inevitably,
there are traffic jams.
488
01:17:50,075 --> 01:17:53,235
Once they get to the market,
trouble begins.
489
01:18:14,835 --> 01:18:17,075
Being both intelligent and brazen
490
01:18:17,115 --> 01:18:20,315
is the key to beating human beings
on their home turf.
491
01:18:58,515 --> 01:19:00,075
It's daylight robbery.
492
01:19:10,515 --> 01:19:15,035
In the city, conflict between man
and animal might seem inevitable.
493
01:19:17,715 --> 01:19:20,555
We create these cities
for ourselves,
494
01:19:20,555 --> 01:19:22,995
and some of the changes we introduce
495
01:19:23,035 --> 01:19:24,955
can be hard for animals
to cope with.
496
01:19:29,435 --> 01:19:32,395
One of the greatest changes
of recent times
497
01:19:32,395 --> 01:19:37,435
has come from a single invention
made less than 140 years ago.
498
01:19:41,715 --> 01:19:42,755
Electric light.
499
01:19:45,475 --> 01:19:47,595
It has become
more and more powerful...
500
01:19:50,275 --> 01:19:51,915
..filling our streets with light.
501
01:20:03,875 --> 01:20:05,275
It is everywhere in the city.
502
01:20:07,875 --> 01:20:09,155
It even goes underground.
503
01:20:28,635 --> 01:20:31,235
The difference between day and night
504
01:20:31,235 --> 01:20:33,715
has become less and less
perceptible.
505
01:20:43,675 --> 01:20:52,475
And that has a profound effect
on the activities of wildlife.
506
01:20:53,035 --> 01:20:57,115
In the wilderness, light triggers
all kinds of behaviour.
507
01:21:03,515 --> 01:21:05,195
On the night of the full moon,
508
01:21:05,195 --> 01:21:08,955
hundreds of tiny hawksbill turtle
hatchlings emerge
509
01:21:08,955 --> 01:21:11,595
from the safety of
their nest, deep in the sand.
510
01:21:14,715 --> 01:21:17,955
Their instinct is to reach the sea
as quickly as possible.
511
01:21:20,595 --> 01:21:24,915
And their guide is the light of the
full moon, reflected on the water.
512
01:21:32,435 --> 01:21:34,035
But this young hatchling...
513
01:21:35,035 --> 01:21:35,955
..is confused.
514
01:21:44,555 --> 01:21:46,995
It's going in the wrong direction.
515
01:21:52,355 --> 01:21:54,435
Bright light is coming
from the land.
516
01:21:57,835 --> 01:22:02,035
And all these hatchlings are
travelling up the beach towards it.
517
01:22:08,595 --> 01:22:11,315
Predators are ready
to take advantage.
518
01:22:13,235 --> 01:22:17,115
Crabs now make their burrows
directly beneath the beach lights...
519
01:22:18,155 --> 01:22:20,555
..and wait for their prey
to come to them.
520
01:22:42,995 --> 01:22:46,835
Even if a hatchling escapes,
they're still in peril.
521
01:22:55,875 --> 01:22:58,715
The lights become
more and more bewildering.
522
01:23:23,115 --> 01:23:25,955
80% of all hatchlings on this beach
523
01:23:25,995 --> 01:23:29,835
are now disoriented
by the lights of the town.
524
01:23:50,355 --> 01:23:52,755
Roads bring many to their end.
525
01:24:08,035 --> 01:24:11,555
Hundreds get trapped in storm drains
every night.
526
01:24:26,195 --> 01:24:28,275
Exhausted by the effort
of travelling
527
01:24:28,275 --> 01:24:29,715
such a distance on land...
528
01:24:32,395 --> 01:24:36,395
..this hatchling's chances
of surviving the night are slim.
529
01:24:49,075 --> 01:24:51,915
This turtle is one
of the countless species
530
01:24:51,915 --> 01:24:54,035
that have been unable to adapt
531
01:24:54,075 --> 01:24:57,755
to the change brought about
by the urban environment.
532
01:25:04,875 --> 01:25:10,355
Whether we choose to live in harmony
with wildlife is up to us.
533
01:25:10,395 --> 01:25:13,115
But there is one city
where that idea
534
01:25:13,155 --> 01:25:15,755
is being applied on a major scale -
535
01:25:18,955 --> 01:25:20,035
Singapore.
536
01:25:25,915 --> 01:25:30,675
Two million trees have been
planted here in the last 45 years.
537
01:25:32,515 --> 01:25:36,755
This city is now richer in species
than any other in the world.
538
01:25:40,955 --> 01:25:44,315
And this practice extends
to all parts of the city.
539
01:25:47,515 --> 01:25:49,555
The waterways have been cleaned up
540
01:25:49,595 --> 01:25:52,555
and smooth-coated otters
are coming back.
541
01:25:56,675 --> 01:26:01,515
But perhaps the most spectacular
example of city greening
542
01:26:01,555 --> 01:26:04,435
is this grove of "super trees".
543
01:26:18,835 --> 01:26:22,635
Creepers have been planted to grow
over the outermost branches.
544
01:26:26,315 --> 01:26:32,035
This is a new urban world that
we have now designed and built
545
01:26:32,035 --> 01:26:33,635
with others in mind.
546
01:26:36,515 --> 01:26:39,835
Create the space
and the animals will come.
547
01:26:48,995 --> 01:26:51,835
Is this a vision
for our cities of the future?
548
01:27:00,995 --> 01:27:04,235
It could be possible
to see wildlife thriving
549
01:27:04,235 --> 01:27:07,275
within our cities across the planet.
550
01:27:09,595 --> 01:27:13,875
We, after all, are the architects
of the urban world.
551
01:27:15,915 --> 01:27:17,995
Looking down
on this great metropolis,
552
01:27:18,035 --> 01:27:22,915
the ingenuity with which we continue
to reshape the surface of our planet
553
01:27:22,955 --> 01:27:23,675
is very striking.
554
01:27:25,035 --> 01:27:27,235
It is also sobering.
555
01:27:27,235 --> 01:27:29,915
It reminds me of
just how easy it is for us
556
01:27:29,955 --> 01:27:32,955
to lose our connection
with the natural world.
557
01:27:34,395 --> 01:27:38,555
Yet it's on this connection
that the future of both humanity
558
01:27:38,595 --> 01:27:41,035
and the natural world will depend.
559
01:27:42,555 --> 01:27:47,755
It's surely our responsibility
to do everything within our power
560
01:27:47,795 --> 01:27:52,235
to create a planet that provides
a home, not just for us,
561
01:27:52,235 --> 01:27:54,915
but for all life on Earth.
43172
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