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Nature's Deadliest Duels | 4K UHD | BBC Earth - Video học tiếng Anh
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Nature's Deadliest Duels | 4K UHD | BBC Earth
Nature's Deadliest Duels | 4K UHD | BBC Earth
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0:05
The lions are surrounded by wilderbeast
0:08
on their annual migration.
0:16
A quarter ton bull would make a good
0:19
meal for all 10 of the pride.
0:30
But even though charm is an experienced
0:33
hunter,
0:35
most attempts end in failure.
1:06
Charm uses her hind legs to knock the
1:09
wilderbeast off balance.
1:19
Yeah, I know.
2:07
The smallest cubs won't be able to catch
2:10
food for themselves for another 12
2:12
months.
2:14
Their
2:16
ever growing appetites mean that charm
2:18
and Sienna have to hunt around the
2:21
clock.
2:27
The females are often forced to head out
2:30
alone.
2:32
Tonight it's Sienna's turn.
2:41
Sunrise.
2:50
Sienna is seriously injured.
2:54
She's too weak to move.
3:03
A lone lion is always at risk of attack
3:06
by buffalo, hyenas,
3:09
even other lion prides.
3:41
It's evening
3:44
and Siona hasn't returned to her family.
3:52
Now everything depends on charm.
4:03
>> They're setting off on the greatest
4:05
overland trek made by any animal.
4:31
But wherever grass eaters travel,
4:34
predators lie in weight.
4:38
Here
4:43
they are.
4:46
Arctic wolves.
4:54
They must seize their chance while the
4:56
caribou pass through their territory.
5:34
The wolf runs at the herd.
5:37
trying to flesh out the weak or the
5:39
slow.
5:49
A calf is separated
5:58
at full tilt, 60 km an hour. The Wolf is
6:02
just faster.
6:12
But the calf has stamina.
6:44
only a few weeks old and this calf's
6:47
will to survive is remarkable.
6:54
And it needs to be for these young
6:57
caribou have now started a journey that
7:00
will last a lifetime.
7:05
Forever chasing the seasonal growth of
7:08
the grass on which they depend.
7:19
Like all grassland creatures, they are
7:21
at the mercy of these unpredictable but
7:24
ultimately bountiful mans.
7:33
Grass can survive some of the harshest
7:35
conditions on Earth, flood, fire, and
7:39
frost, and still flourish.
7:51
So it is that grasslands provide a stage
7:55
for the greatest gatherings of wildlife
7:58
on planet Earth.
8:01
But leopards are the most versatile of
8:03
all the big cats. Adept at finding cover
8:07
in the most unpromising places.
8:27
The steep walls of the gully are now her
8:29
cover for an ambush.
8:36
The male puku is close enough, but he's
8:40
too big to tackle.
8:43
She needs to slip past him without being
8:46
seen.
8:57
If he spots her, he'll blow her cover.
9:19
Slowly does it.
9:30
To succeed here, she needs to find prey
9:33
grazing close to the edge
9:36
or better still in the gully itself.
10:26
frustration.
10:30
Success would have saved off hunger for
10:32
a week.
10:37
But while there's prey around, there's
10:39
hope.
10:44
Peeking over the top is a risk, but it's
10:47
the quickest way to find a new target.
11:25
A burst of speed of 65 km an hour and
11:28
it's all over in less than 6 seconds.
11:41
Except it isn't.
11:52
Dazed and disorientated, the impala
11:55
makes a miraculous escape.
12:00
As they mature, young males begin to
12:03
explore the boundaries of the pride's
12:05
territory.
12:11
Red has ventured out alone.
12:28
and blondes straight into the middle of
12:31
the hyena clam.
12:55
He's trapped by over 20 of them.
13:16
The pack tries to wear him down.
13:20
This number of hyenas could kill him.
13:48
It's impossible to fight them all at
13:50
once.
14:06
He can't keep them at bay for much
14:08
longer.
14:09
He's tiring fast.
14:21
His ally Tatu has heard the commotion.
14:45
Now the odds have changed.
14:54
Even for 20 hyenas,
14:57
a pair of male lions is too much to take
15:00
on.
15:11
Red is lucky.
15:21
Tatu has saved his cousin's life.
15:35
And now the snakes are on the alert.
15:40
This is the best feeding opportunity
15:42
they will get all year.
15:59
On flat ground, a baby iguana can outrun
16:03
a race of snake.
16:06
But others are waiting in ambush.
16:35
Another hatchling has its first glimpse
16:38
of a dangerous world.
17:38
A snake's eyes aren't very good, but
17:41
they can detect movement.
17:45
So, if the hatchling keeps its nerve, it
17:47
may just avoid detection.
18:19
Heat.
18:31
Heat.
18:40
Heat. Heat.
19:21
A near miraculous escape.
19:30
The lucky survivors could begin learning
19:32
the unique way of life demanded by this
19:36
hostile island.
19:41
Mother is after eggs,
19:46
but getting them is not going to be
19:48
easy.
20:09
The geese will risk their lives to
20:11
protect their eggs.
20:13
If they lose them, they can't produce
20:16
another clutch this season.
20:23
The fox wins.
20:34
She gives the first eggs to her young
20:37
pups
20:42
and then heads back for more.
21:09
Some of the eggs she stashes away.
21:15
They will be food to help her through
21:17
the coming winter.
21:37
In just 3 weeks, she will steal over 800
21:41
eggs from the geese.
21:54
But eating a big egg is not easy if one
21:58
is rather small.
22:03
It's a technique the pups haven't quite
22:06
yet cracked.
22:09
Mom shows how it's done.
22:16
It's coming.
22:41
And this bobcat may be in luck.
22:45
for this particular valley is blessed.
22:54
A river here never freezes.
22:59
It's fed by a volcanic hot spring that
23:02
heats these waters to 50° warmer than
23:06
the surrounding air.
23:12
Hungry animals of all kinds come here to
23:15
feed.
23:40
Throughout the winter, the river is full
23:42
of food for those who know how to catch
23:45
it.
23:57
Here even the coyotes have become
24:00
fishermen.
24:04
But hunting is hard for a cat that's not
24:07
used to getting its feet wet.
24:18
So he must choose his target with care.
24:33
Golden eye ducks.
24:36
But can he get close enough to pounce?
25:10
Perhaps you'll have more luck on the
25:12
other sideep
25:29
here. Steam from the river warms the
25:32
surrounding trees,
25:35
so up in the branches there could be
25:37
prey.
25:43
If only he could get to it.
25:47
It's 6 m up.
26:06
At last, a squirrel.
26:10
Not much, but enough to keep him going.
26:16
To survive a winter in these mountains
26:19
takes tenacity.
26:21
And bobcats have that in abundance.
26:26
Somewhere along this seemingly barren
26:29
stretch of sand, there is food
26:33
in great quantity.
26:47
Cape furs.
26:52
There are around 10,000 of them here.
27:11
Adult seals are large and strong,
27:19
but their pups are neither.
27:27
The youngsters are closely guarded by
27:30
their mothers.
27:33
A hyena, however, knows to be patient.
27:41
Sooner or later, seal mothers must
27:44
return to the ocean to cool off.
27:55
A single seal pup could feed a hyena and
27:59
her family for days.
28:06
But finding food is only half the
28:08
battle.
28:13
It now has to be carried back.
28:21
a jackal is here, too.
28:27
And it's not alone.
28:35
If a hyena loses her kill, she'll have
28:38
nothing with which to feed her cubs.
28:55
The jackals won't follow her very far
28:58
from the coast.
29:00
It's too hot for them in the desert
29:02
interior.
29:09
Only by making these long journeys can
29:12
brown hyenas manage to survive in the
29:15
middle of the Namib.
29:22
Losing its fear of humans has enabled
29:25
one animal to spread into cities
29:27
everywhere and in huge numbers.
29:37
Pigeons are by far the most successful
29:41
urban bird.
29:48
Here in Albi in the south of France, the
29:51
pigeons come to the river to bathe.
29:54
They need to pre their flight feathers,
29:57
clean off the city dust,
29:59
and cool themselves down.
30:22
But death lies in weight.
30:26
A predator that has taken advantage of
30:29
the very thing that has led to the
30:30
pigeon's success,
30:34
their lack of fear.
30:39
As the pigeons bathe, oil from their
30:41
plumage flows downstream and is
30:44
detected.
30:56
A monstrous wells catfish
31:01
introduced here just 40 years ago. They
31:05
have proliferated,
31:08
virtually exterminated the local fish
31:10
stocks,
31:13
and they've now developed a taste for
31:16
pigeon.
31:19
Their eyesight is poor, so they use
31:21
their barbles to sense the movements of
31:24
their victims.
31:29
Heat.
31:44
Heat.
32:20
This is A radical new hunting strategy
32:23
for what is normally a bottomdwelling
32:26
fish.
32:41
After a thousand years of living in this
32:44
city, pigeons are now having to learn to
32:47
avoid a fish.
32:54
In just 3 weeks, half a million calves
32:57
are born on these ashri plains.
33:03
That's 24,000 a day.
33:07
A thousand an hour.
33:13
Calves stand up within a few minutes of
33:15
being born.
33:20
Though some need a little more time to
33:23
find their feet,
33:36
but a mother won't let her calf suckle
33:38
until it's mastered a few physical
33:41
skills.
33:45
Walking
33:48
Shorting
33:51
and running.
34:02
Wilderbeast calves must run if they're
34:05
to stay alive.
34:22
For these planes also support the
34:25
greatest assembly of hunters on the
34:28
planet.
34:33
Each species has its own special hunting
34:35
technique,
34:37
but all have the same aim.
34:43
to make the most of this brief super
34:45
abundance of life.
35:19
Heat. Heat.
35:46
Only one in 10 wilderbeast calves will
35:49
survive to adulthood.
35:52
But that is enough to maintain the
35:54
million strong herd of wilderbeast.
35:58
and the planet's highest density of
36:01
predators.
36:13
It's July in the deserts of Nevada in
36:16
the western United States,
36:19
the hottest time of the year.
36:35
Bands of wild horses mustang are
36:38
converging on one of the last remaining
36:41
water holes around.
36:48
Now, water not only offers them the
36:50
chance to drink, it can also bring
36:53
power.
36:57
If a stallion can control access to
37:00
water, he will have secured mating
37:02
rights to the entire herd.
37:05
So, stallions try to dominate these
37:07
pools, fighting off rivals who venture
37:10
too close.
37:24
a stranger.
37:27
He's traveled 15 kilometers to be here
37:30
because the pools where he's come from
37:32
have already dried up.
37:37
With him come his females.
37:41
If he can't provide them with water,
37:43
they will leave him for the white
37:45
stallion, who already dominates this
37:47
pool.
37:59
>> So he will have to fight.
38:20
Fire.
39:01
There is everything to lose.
39:05
A broken leg or a shattered jaw would
39:07
mean a slow and painful death.
39:30
A missed kick and it's all over.
39:36
The new arrival has won.
39:40
And his prize is more than just a chance
39:43
to drink. He has provided for his herd
39:46
and in the process stolen his rivals
39:49
females.
39:52
The White Stallion's rule is over.
40:04
She enters into the maze of gullies.
40:10
The damp channel margins are carpeted
40:13
with grass
40:15
that lures in grazing antelope.
40:33
Still they remain on high alert.
40:43
Stealth is the best weapon.
41:22
Placing faith in perfect camouflage.
41:30
The trap is set.
41:42
Just a few more careless steps and
41:45
they'll be inside the required 30 ft
41:48
range.
42:18
Clamping her jaws over both nose and
42:21
mouth,
42:22
she can stay clear of those stiletto
42:24
horns
42:26
and cut off its airflow.
42:43
But a spotted hyena is drawn to the
42:45
commotion.
43:04
close to twice the weight of a leopard.
43:10
Armed with bone crushing jaws,
43:14
this opportunist won't pass up the
43:16
chance to cash in on the hard work of
43:18
others.
43:29
This time,
43:31
one very lucky implorer gets a second
43:34
chance at life.
43:44
For many years, Blacktip has lived in
43:46
peaceful coexistence with her mother,
43:50
each with enough territory to survive.
43:56
But Blacktip's pack has grown huge. It's
43:59
now 30 strong.
44:06
For the first time, she needs more
44:08
territory if she's to feed her growing
44:11
family.
44:23
Normally, a daughter would not invade
44:25
her mother's territory.
44:30
However, with hyenas ruling to the south
44:34
and humans having taken the hunting
44:36
lands to the west,
44:39
Blacktip has no choice
44:42
but to turn her sights east,
44:47
towards her mother's lands,
44:54
where after a morning's hunt, Tate and
44:57
her back are resting.
45:29
Blacktip's pack outnumbers her mothers
45:32
by more than 2 to one.
46:11
An ambush.
46:28
Against these odds, Tate is powerless.
46:41
Retreat is the only option.
46:51
This has now become Blacktip's
46:54
territory.
47:05
A brief but bloody battle.
47:10
Tate and her pack are now homeless.
47:24
She retreats eastwards.
47:27
But this is dangerous country. Blacktip
47:30
reef sharks.
47:33
They are bigger and more powerful than
47:36
Tvali,
47:39
but not as fast or as agile.
47:46
The hardyheads are well aware of them,
47:49
but so long as they stay just out of
47:51
reach, they have little to fear.
48:08
But now the sharks and the Tbali join
48:10
forces.
48:17
Together they enter the shallows, each
48:19
looking for a chance to attack.
48:39
The Trali make the first move
48:43
and the hardyheads take refuge again in
48:45
the waves.
48:47
And this is what the sharks have been
48:49
waiting for.
48:55
Surging forwards, they chase the hardy
48:57
heads out of the water,
49:00
beating themselves in a daring bid to
49:03
hoover up their prey.
49:08
The hardy heads that escaped the sharks
49:11
swim back out to deeper water,
49:15
but into the mouths of the trapali.
49:28
Now the receding waves help to pull the
49:31
sharks back into deeper water.
49:46
Heat.
49:48
Heat.
50:04
In the chaos, the seabirds get their
50:07
chance.
50:13
It's a feeding frenzy.
50:15
in only 10 cm of water. Lions will
50:20
normally avoid hunting in such heat,
50:25
but they're also opportunists.
50:49
The lions will need to bring him down
50:51
quickly before they overheat.
51:28
Even away from the herd, a bull is a
51:31
formidable opponent.
51:34
He could gore and kill a lion.
52:12
Heat.
52:15
Heat.
52:30
close to overheating, they finally
52:32
succeed in bringing him to the ground.
52:48
But the massive bull is not giving up.
53:03
Against the odds and the full weight of
53:06
the lions, he regains his feet.
53:16
And it is now that the tables turn.
53:25
The lions are exhausted.
53:28
After a 20inut struggle, only the bull
53:31
has the energy to finish the fight.
53:56
In such exposed and extreme conditions,
54:00
the challenge for predators and their
54:02
prey is at its most intense.
54:10
The forests of central China,
54:15
home to the golden snub-nosed monkey.
54:24
They will not survive the fast
54:25
approaching winter unless they stock up
54:28
on calorier rich food.
54:33
Top of their autumn menu, pine cones.
54:39
They grow during the summer sunlight and
54:41
are rich in fats.
54:48
Few are now left and time to gather them
54:51
is running out.
55:00
Dominant males patrol the troop, making
55:03
sure they get the pick of the crop.
55:08
As the number of pine cones dwindles,
55:11
tensions between rival families
55:13
increase.
55:22
Mere threats between two males may not
55:25
be enough to settle disputes.
55:35
Conflict is in the air.
55:38
There's going to be a fight.
56:13
Vital food is at stake. So every pine
56:16
cone is worth fighting for.
56:44
The victor and his family enjoy the
56:47
spoils of war.
56:53
The losers get no more than a few dead
56:56
leaves and will have fewer energy
56:58
reserves for the coming winter.
57:16
Christmas Island in the Indian Ocean.
57:20
For millions of years, this remote speck
57:23
of land has been ruled by crabs.
57:29
Their
57:33
ancestors came from the sea, but most
57:36
have now adopted a landbased existence.
57:49
Given there are so many of them, they
57:51
get along relatively harmoniously.
57:56
They're the gardeners and caretakers of
57:59
a tiny crab utopia.
58:05
Once a year, they must all return to the
58:07
sea to breed. And the March of the Red
58:10
Crabs is one of the greatest natural
58:13
spectacles on Earth.
58:26
There are 50 million of them.
58:36
It's an event that has brought the
58:38
island worldwide fame.
58:51
But in recent years, millions of red
58:54
crabs haven't managed to reach the sea.
59:02
An invader has occupied this island.
59:08
Yellow crazy ants.
59:12
They escaped from visiting ships and
59:14
with no predators to control them, they
59:16
have now created fast super colonies in
59:19
the forest.
59:26
When migrating red crabs march into
59:28
their territory, the ants attack,
59:32
squirting acid into the crab's eyes and
59:35
mouths.
59:46
The crabs have no defense.
59:52
Blinded and confused,
59:55
they're doomed.
60:07
Humans brought these ant invaders here
60:11
and now humans are having to control
60:13
them.
60:17
Isolated communities may evolve for
60:20
millions of years in relative peace,
60:24
but when new challenges arrive, they can
60:27
struggle to cope.
60:31
Of all the species that have become
60:33
extinct in recent years,
60:36
around 80% have been islanders.
