All language subtitles for 07 Human.en

Sauraha, Nepal.

This rhino is not lost.

He is on his way to find food.

To get it, he must travel through
a new and alien world.

This rhino in his lifetime

has seen more changes than
any of his previous generations.

Across the globe,

animals of all kinds
are now contending

with one newly dominant species...

...us.

Like so many wild creatures,
he's had to learn

how to live in the human world.

Some animals

have changed their behaviour

to make the most
out of living amongst us.

These long-tailed macaques
live in Bali.

They have developed
new interests

brought by human visitors.

Every morning,
the troop heads for a building

in the centre
of their territory.

Uluwatu Temple.

Tourists come here every day -
in crowds.

So the temple grounds
are full of opportunities...

...if you know where to look.

There is a constant supply
of hats...

...and sunglasses.

And if you've mastered
the element of surprise...

...it's easy to get them.

But this harvest
is not for eating.

It's for bargaining.

Seems like a fair trade.

But there are greater rewards
to be had

for those who know
how to get them.

And this old male
appears to be doing...

...very well.

He and the other elders
in this troop

have both experience
and knowledge.

They've been working the temple
for over ten years,

and now concentrate
on the big stuff...

...things that human beings
just can't do without.

No-one wants to walk home
with just one shoe.

And these old boys can't wait

to get their hands
on the latest tech.

They've worked out
that we simply can't survive

without our phones...

...or our wallets.

The older males understand

something the youngsters
have yet to learn...

...the art of the deal.

A banana?

How dare you!

A bar of chocolate?

That's better.

The real skill
is in the negotiations.

The macaques are playing us
at our own game.

They demand...

...whatever they want.

Humanity has spread
to every corner of the globe.

We have become
a force of nature.

We have altered
80% of the land's surface.

Eight billion people
now live on this planet...

...and we are changing
the world around us

at such speed...

...that, for animals,
the challenge is to keep up.

New York City.

Ants.

This particular species
is thought to have arrived here

with the first European settlers.

They are now known as pavement ants

because they live almost exclusively
in our towns and cities.

And they're thriving
because of junk food.

And here on Broadway Avenue,

there's a lot of it.

This is what every pavement ant desires.

And to get it...

...the ants use
the city's thousands of miles

of underground tunnels.

This scout is closing in
on its target.

But the animals with which
they share the pavement

are 40 million times
their weight...

...so it's best
to stay in the cracks.

Jackpot!

A meat mountain.

This is too big a job
for just one ant.

This worker is female,

as they are
in all ant colonies,

and she leaves a trail of pheromones
to mark a path.

She communicates
with every sister she meets

as she returns to the nest,

and news on the street
spreads fast.

This ultra-processed meat

is very different
from their original food.

But their digestive system
is the key to their success.

It's able to keep up
with the way

humans constantly change
their diet.

Nowadays, the vast majority
of what they eat

comes from human food.

On Broadway alone,

pavement ants
eat the equivalent

of a staggering 60,000 hot dogs
every year.

The calories
in a single hot dog

could fuel the growth

of the entire ant colony
for a month...

...if only they can get it
back to the nest.

But this slow work
makes them vulnerable.

They aren't the only ones
partial to fast food.

It's a race
to get their prize home.

There may be losses...

...but the colony as a whole
will now thrive.

In fact, pavement ants
are so successful here

that they outnumber
human New Yorkers 1,000 to 1.

But success in the human world
can be harder to achieve

if your reputation precedes you.

Here in India,

this cobra is heading directly
for a village.

It has detected
the scent of prey.

Nearly two metres long,

it has enough venom
in a single bite

to kill ten people.

Snake bites are responsible

for nearly 60,000 deaths a year

in India alone.

They travel so silently

that their presence
is often undetected.

And when they are hunting...

...there is no place
they won't go.

A toad.

Each tip of its forked tongue

collects chemical signals
from the prey

and helps to reveal
its position.

But up close...

...the snake relies on movement

to precisely locate its prey.

The toad must pick its moment
to escape.

Every time
it touches the ground...

...the toad leaves behind a scent.

It can hide...

...but the trail
will lead the snake to it.

These cobras
don't just hunt here.

They live here.

They have found a home where
the Hindu villagers revere them

and consider them
to be demigods.

Remarkably, scientists believe
that this tolerance

has led to a change
in the snakes' behaviour.

They move more slowly

and are less likely
to strike if disturbed.

One of the most feared animals
on the planet

has found a place
where they are accepted

and can coexist
with human beings.

But for many animals
living in the human world,

it pays to keep a low profile.

Here in Melbourne, Australia,

one creature has perfected
the art of camouflage.

A frogmouth chick.

Its father helps to hide it
during the day.

They are nocturnal birds,

and as day turns to night,

its parents come out
of the shadows

to reap the rewards
of urban living.

The city lights create

excellent conditions
for hunting.

Every night in the city

is as bright
as when there is a full moon.

So city frogmouths often...

...have their mouths full.

He's growing fast, and today
he just won't sit still.

And now he has revealed
his presence.

The first rule
of frogmouth behaviour is

don't move in the day.

But this is the one time
in a frogmouth's life

when the urge to fly
simply cannot be suppressed.

But he's not ready
to leave home just yet.

Come night-time...

...he's hungry again.

He is wide awake...

...and wants to take off
where he left off.

But he's getting
unwanted attention,

and this time his parent
is not nearby to protect him.

Humans bring pets,

and cats in Australia
kill a million birds a day.

His first proper flight.

But unless he can find
a safe place to roost,

he is still in peril.

Made it.

But if he is to survive
in the city, like the adults,

he'll have to learn
how to blend in.

Some animals are so bold

that they don't even
try to hide.

To see a large predator in the
built-up world is a rare sight.

And here in Lake Tahoe,
in North America,

these black bears
are particularly big...

...and they're heading
right to the centre of town.

Winter is approaching,

and these bears need to put on
as much weight as possible

before the snow arrives.

This is a great place to gorge.

It's now bear country.

Why struggle for a meal...

...when you can cross the street...

...for a takeaway?

There's so much food here

that some of the bears
are 50% heavier

than their country cousins.

But why stop here?

Some bears
just want to dine in.

A lucky few are able to get
an easy meal from the human world.

But when WE venture to the natural
world in search of food...

...the harvest
is on a different scale.

In just four decades,

fishing reduced
fish populations by half...

...and created great problems
for the ocean predators

that once had such food
to themselves.

Off the coast
of Vancouver Island,

humpback whales inhabit waters

where herring
have been overfished.

Humpbacks, however, are
renowned for their ingenuity.

12 years ago, an adult male
called Conger

adopted a totally new way
of feeding.

When the density of fish
in the water is low,

and birds are diving
to catch them...

...the humpback opens its mouth

and creates a space that
the fish mistake for shelter.

The fish swim in...

...and the trap is closed.

Conger was the first humpback
whale to be seen doing this.

Now 30 whales in the area
use this same technique.

The population of humpbacks
here is growing,

and you might think
that this would

reduce fish stocks even more,

but something surprising
is thought to be happening.

These tiny phytoplankton
are the basis of the food chain

and need a vital ingredient to grow.

Iron.

Whale faeces are rich in iron...

...and great whales produce it
in enormous quantities...

...so the phytoplankton flourishes,
and herring feed on it.

Whale faeces, in fact,

are helping to restore
the whole ecosystem.

The herring attract seabirds,

diving birds attack them
from beneath,

and gulls and shearwaters
dive on them from above.

Even bald eagles
benefit from this rich feast.

Astonishingly, even though
Conger and all the other whales

are feasting on fish,

their role in fertilising
the ocean is so influential

that herring numbers here are
actually predicted to increase.

And the role they play in
rejuvenating the environment...

...is having an even greater
impact on the human world.

The flourishing plankton
also collects carbon

from the atmosphere,
just as trees do...

...so much so
that each great whale

has the same impact
as a forest of 30,000 trees.

Our great whales
were once hunted...

...and if they return
to their pre-whaling numbers,

it's estimated that this
would be equivalent to planting

over 30 billion trees.

Whales are now being recognised
as benefiting humanity.

But for most large animals,

competition with humans
brings conflict.

This six-tonne African
bull elephant is in his prime.

To stand the best chance
of winning fights for females,

he needs to be big.

He can smell
highly nutritious food is near.

But crossing the boundary
to reach it

is a dangerous journey.

He must wait
for the cover of darkness.

These Kenyan farmers are
preparing for the night ahead.

They have had to guard
their crops every night

for the last two months.

With only two days
until harvest,

this is a critical time.

In a single night,

a bull elephant
can destroy the entire crops

produced by ten farmers.

But he's taking a huge risk.

He's twice the height
of a man...

...and he won't back down easily.

This human-wildlife conflict
happens night after night.

And each year,
it takes the lives

of up to 200 elephants
and 20 people in Kenya alone.

This standoff
is potentially lethal.

The farmers
have had to call for help

from a team
of highly experienced rangers.

Although they're armed,

their task is to drive
the elephant out of the field

without harming it.

But the bull is determined...

...to hold ground.

The rangers
will have to get closer...

...on foot.

The rangers have to resort...

...to firecrackers.

The bull is driven
from this field...

...and retreats deep into the bush.

Fortunately for this bull,

the battle
has been resolved peacefully.

And efforts like these are seeing
fewer elephants killed,

and their population in Kenya
is starting to rise again.

But conflict with wildlife

is now occurring
on a far greater scale

as a consequence

of the way we are changing
the world's climate.

Some arid regions

are now experiencing
unusually high rainfall.

And that is good
for growing crops

here in northeastern Africa.

But it's also
the perfect conditions

for one particular insect.

Desert locusts.

They're normally solitary creatures,

but emerging from the sand
in great numbers

triggers a dramatic physical change.

They turn a vivid yellow

and become highly social.

Together,
they are an unstoppable army.

On foot,
they can cover a mile a day.

But they can only go so far
in this way.

They need to find height.

Up here, they begin
their final transformation.

Normally,
it takes an individual insect

at least a month
to become a winged adult...

...but in their social form,
their development speeds up.

Now all they need
is for their wings to harden.

Once airborne, they can travel
60 miles in a day.

Swarms merge
and they become a plague.

This one contains
billions of individuals,

and eats as much in a day

as the entire population
of Germany.

Today in northeastern Africa,

as a consequence
of climate change...

...devastating surges of locusts

are becoming more frequent.

Two worlds are colliding.

Unintentionally, humanity has
created exactly the conditions

that cause this species
to explode in numbers.

But another group of animals
has seen

an even more dramatic rise

as a consequence of OUR actions.

We have increased the numbers
of a few species

almost astronomically.

By weight,

70% of the world's birds
are now chickens

or other domesticated fowl.

We rear 70 billion farm animals
each year...

...and every one of them
needs feeding.

Producing the food

for such numbers
of domesticated animals

is having a profound impact
on the natural world.

The Amazon rainforest -

twice the size of India.

It's so rich,

it contains one in every ten
species on the planet.

And it's home to this sloth
and her ten-month-old baby.

He was born into an environment

virtually untouched by humanity.

But now human beings
are claiming even this space.

Year after year, we clear
over two million hectares

of the Amazon forest -

an area the size of Wales.

And we use nearly all of it

to make more space
for cattle...

...and to grow soya
to feed our livestock.

Today, habitat destruction
is the biggest problem

we have created for wildlife
around the world.

This porcupine
has survived the fire...

...and is being rescued.

It's being relocated
to pristine forests.

This will be its new home.

Only a fortunate few animals

are being given
such a second chance.

A healthy natural world is
not only vital for wildlife...

...but for our own very existence.

Somehow we must find ways
to redress the balance.

Currently, the vast majority
of agricultural land,

more than 75%,

is used to raise livestock,

and this is very inefficient.

There are solutions.

One is considering what we eat.

If we shift away
from eating meat and dairy

and move towards
a plant-based diet,

then the sun's energy goes directly
into growing our food.

And because
that's so much more efficient,

we could still produce
enough to feed us,

but do so
using a quarter of the land.

This could free up an area
the size of the United States,

China, the European Union
and Australia combined...

...space that could then
be given back to nature.

And human innovations
may be able

to do even more for wildlife.

High-tech farms
now grow plants vertically,

yielding up to 350 times
the food grown in the same area.

This is one of many solutions
we already have,

and others
are surely on the horizon.

To find ways
to protect all life on Earth

means reimagining how we live
on this planet in the future.

Human ingenuity,

our extraordinary ability
to find solutions,

gives me hope that we can.

It will be the major challenge

for this generation
and the next.

To film the impact

that fires are having
on the Amazon,

the Planet Earth III team

joined a local
volunteer fire brigade.

The fire brigade
are responding to a patch

of primary rainforest
that is burning.

It's been burning
for two days now.

It's difficult to know
what we're going to see.

The fires
are mainly lit illegally...

...to clear space for cattle.

Battling fires
is dangerous work.

But the firefighters
face them every day.

For the wildlife film crew,

this is a totally new experience.

And these fires
can be unpredictable.

Neil, don't spend long
in there.

Oh!

With the ground team retreating,

the safest way to carry on
filming is with the drone.

Have we lost the drone?
I think Abi has seen it.

Abi is on her way.

Can you confirm you're on
your way to the drone, Abi?

The drone is damaged
beyond repair.

Don't worry about it.
I mean it.

Don't worry about it.
It's absolutely fine.

It's not OK. It is. It's OK.

It's equipment.
We've got a spare.

The main thing is,
we're all safe. No-one's hurt.

The team regroup...

...and decide to move away
from the heart of the fire

to its fringes

to look for animals
caught up in the flames.

There's been reports
of a monkey in the trees, so...

Ah!

The problem is, there's fires
all the way along here,

as well as all along here, so...

It's hard to know what all
this wildlife is going to do

when their home
is burnt up like this.

I don't know what it's like
for these rainforest animals

to be experiencing a fire.

It's horrific for me, so...

...I don't know
what it is for them.

The fires burn into the night.

The following day,

the crew accompany
the firefighters

in the search for animals
in the aftermath.

Oh, my God, there are flames
all inside of it.

Little termite...

Oh, my God!

Remarkably,
some animals have survived.

Clearing land for farming

is not a problem
unique to the Amazon.

Agriculture now takes up
half of the habitable land

on the planet.

To produce food with less impact
on the natural world

requires new approaches.

And that led the wildlife
film crew to a farm

in a warehouse.

We're in the middle of the city!

I can't believe so much food

being grown
in such a small space!

Here in Los Angeles,
6,000 miles from the Amazon,

this farm is part of
a burgeoning food revolution.

This is the most productive
farm in the world,

and it's our goal to reduce the
amount of land and resources

necessary to grow
down to the bare minimum.

It took a while
to understand that, for nature,

agricultural use of land

was the primary, like, destructive
behaviour of humanity.

As we expand
this means of growing,

I'm very hopeful that
this approach can ultimately

give a lot of land back
to nature

and allow that biodiversity
to re-establish and flourish.

Not only does this farm
use less space...

...but it also uses 90% less water,

no pesticides,

and cuts food miles.

It does feel
like a really good start.

Ideas like this can reduce
our footprint on the planet,

giving the natural world
a chance to bounce back.

Next time,

the heroes on the frontline
saving wildlife.

They're exploring remote jungles...

...working undercover to catch criminals...

...and leading endangered creatures
to safety.

Habitat Explorer brings animals
and their habitats to life.

Explore this free interactive
and make origami animals.

Go to...

...and follow the links to the
Open University.

Or to order a free printed version,
visit the website

or call the number on the screen.