All language subtitles for The Hunt-6 Race against Time_Track02

The coast.

Nature's most demanding
hunting ground.

So hazardous that few predators
stay here all year.

This frontier between sea and land
is continuously changing.

Opportunities never last long.

To hunt at the coast,
you have to be in the right place

at just the right time.

On the east coast of America, in the
tidal creeks of South Carolina,

a team of hunters is about to leave
the safety of their natural habitat.

This group of bottlenose dolphins
has perfected

a unique hunting strategy.

It relies on teamwork,
intelligence and timing.

But beaching themselves like this is
also difficult and dangerous.

Hunting is only possible for
three hours around low tide,

when the mud banks are exposed.

Razor-sharp oysters cover
much of the shore.

Beaching here could be lethal.

The hunters need to find
a stretch of shoreline

with just the right slope.

Too level
and the dolphins risk stranding.

Too steep and they can't
force their prey from the water.

Working as a team,
the dolphins surround the fish,

driving them towards the shore.

Attacking in perfect synchrony,
the dolphins create a bow wave.

It carries their prey onto
the muddy banks.

Other fish-eaters
profit from their daring.

Herons and gulls follow every hunt.

To get to the fish first,

the dolphins drive themselves
high up the bank.

But if they go too far,
they risk stranding.

To prevent fish
escaping between them,

the dolphins all beach
themselves on the same side.

Always the right.

But this has a cost -

each time they grab a fish,
they also take in a mouthful of mud.

The grit gradually wears down their
teeth...

..but on one side only.

In time, these teeth get so worn
down that older dolphins can no

longer hunt like this and must find
other ways to catch fish.

Within a few hours, the banks
will vanish once again

beneath the muddy water.

The ebb and flow of the tide
dominates the lives of all

who try to hunt on the coast.

Northern Australia has the highest
tides in the tropics,

which expose vast areas of shoreline.

And here lives a truly
extraordinary species of octopus.

Octopuses are marine animals -
they live and breathe underwater.

At low tide, most octopuses would be
imprisoned in their rocky pools.

But this is no ordinary octopus.

It's the only one specially
adapted to walk on land.

It pulls itself along,

using the hundreds of tiny suckers
that line its arms.

Hunting for crabs,
it walks from pool to pool.

Apart from a rather startled fish...

..this one is empty.

So the octopus moves on.

A rock pool may
seem like a safe refuge.

But the octopus' suckers
enable it to move

just as stealthily in water
as out of it.

Nowhere is safe
when this octopus is around.

Everything living here must
march to the rhythm of the coast.

Regiments of soldier crabs,
several thousand strong,

march and counter-march across these
Australian beaches.

They sift out microscopic food.

But they can only feed for a few
hours while the sand remains damp.

And it's not just the tide
they're racing against.

Hunting birds follow in their wake.

But the army is undeterred.

They swarm in such huge numbers

that their predators make little
impact upon them.

But safety in numbers isn't the only
defence on these flats.

Another crab here has
a different strategy.

The sand bubbler crab -
no bigger than a pea.

They also sift out tiny food
particles

and then leave
the sand as pellets in their wake.

Sand bubblers are wary and never
venture far from their burrows.

The crabs position their sand
balls very carefully

to ensure there is a clear
path back to safety.

As soon as the coast is clear,
they're off again,

racing to feed
before the sand dries out.

The industry of thousands
transforms the whole beach...

..until the tide returns once more.

Few hunters make
the coast their permanent home -

most only visit to take advantage
of short-lived opportunities.

On the coast of Thailand,

a most unlikely visitor
waits for the tide to ebb.

Long-tailed macaques feed mostly
on fruit and leaves in the forest.

But these have learnt to supplement
their vegetarian diet with seafood.

As the tide begins to fall,
the macaques make their way

down to the shore - a beach-side
restaurant is about to open.

There's plenty of food here,
if you know how to get at it.

The macaques have learnt to use
heavy rocks as tools

to break open the sea snails.

It takes a great deal of skill to
master this technique,

but not everyone has got
the hang of it.

You have to be ingenious to make
a living at the coast.

As the tide falls still further,
it reveals the next course.

To feed on this dish,

they need a stone tool with a very
particular shape.

They're after rock oysters.

To crack the shells open,
they must strike the oyster

in just the right place
with their chosen tool.

The lowest tide reveals a course
that is particularly delicious...

..but also very hard to collect.

Crabs have good eyesight
and can move fast.

So catching them
requires a special trick.

Before pouncing, the macaques wait
for a wave to obscure their attack.

Macaques learn their skills
by watching their parents.

But some techniques do take
time to perfect.

And time and tide waits
for no macaque.

The returning water closes the beach
restaurant for another day.

It's not just tides that rule
the lives

of those that live on the coast.

The shores of Chile are battered

by some of the wildest
and coldest seas.

This coastline is home to
a remarkable little hunter...

..the South American marine otter.

The world's smallest sea mammal.

This rare and elusive otter is half
the size of its European cousin.

They live along the Pacific
coast of South America,

right down to Cape Horn at the very
tip of the continent.

Surprisingly, the pounding breakers

aren't a problem for
the little otters...

..but the cold water is.

A continuous frigid current sweeps
up from Antarctica.

A small body loses heat faster than
a large one, and so these tiny

otters can only hunt in the chilly
water for 20 minutes at a time.

But their small size enables them
to reach the fish and crabs

that hide amongst the boulders.

To stay warm, marine otters have to
eat a quarter of their body weight

in seafood every single day.

And things are particularly
hard for this female

because her cubs aren't yet old
enough to hunt for themselves.

Before each fishing trip
she rolls in seaweed,

trapping air in her fur,

so insulating herself
from the chill of the seas.

The cold isn't her only challenge.

Being so small, these otters
can only hold their breath

for about a minute, making every
dive a race against time.

This otter lives on a
calorific knife-edge,

often only getting enough from
one hunting trip to fuel the next.

Success - a meal for the youngsters.

These otters spend their entire
lives at the coast,

so they must accept
its day-to-day challenges.

But coasts pulse to much more than
just the daily rhythms.

On the shores of Alaska,

a spectacular annual event
is about to take place.

Each July, predators gather
for the biggest feast of the year...

but it will only last a few weeks.

Brown bears
come down from the hills.

Wolves appear out of the woods.

And seals assemble in the ocean.

The coast is the only place
where hunters from the sea

meet those from land and air.

Bears have a sense of smell
2,000 times better than ours

and can even detect prey out at sea.

They know the salmon are coming.

BARKING

They also know the best
fishing spots...

..and are prepared to fight for them.

GROWLING

GROWLING

After years feeding out
in the Pacific,

the salmon are returning to spawn.

But before they head upriver,

they must pause and modify their
bodies to function in fresh water.

The young and overeager try to
catch the salmon

while they're still in the surf.

Those with experience
are more patient.

After six months of starvation
in a winter den,

all this food is just too
tempting for the youngster.

Wise old bears wait for the
salmon to move into the river,

where they know
the fishing will be easier.

The incoming tide signals a change.

The experienced bears now take up
their prized fishing spots

at the mouth of the river.

The salmon are finally here.

As the fish are funnelled
into shallower water,

a seal gets its chance.

The wolves will have to wait.

Bears dominate the river-mouth.

These bears rely on the salmon run

for nearly 90% of their year's food.

Most of the salmon make it
upstream past the bears,

but now they must run
the gauntlet of wolves.

The salmon will sustain the wolves
through the rest of the summer.

The sheer abundance of this
seasonal bounty

has made these bears
the largest in North America.

Estuaries are the meeting
place of rivers and sea,

and they're vital staging
points for migrating birds.

In Europe, each autumn, they're
visited by millions of waders.

The birds are returning from their
breeding grounds in the Arctic

to overwinter in Africa,
and are stopping off to refuel.

Knot can only feed when
the mudflats are exposed.

At high tide,
they're forced onshore

where they must wait for the tide
to turn and reopen the larder.

A peregrine falcon.

BIRDS SQUAWK

Young peregrines come to these
estuaries in autumn...

to hunt waders.

Peregrines are the world's
fastest aerial hunters,

but this is a very challenging
environment for a young falcon.

It's one predator faced
with thousands of prey.

Flashing black and white,

the swirling mass of wings dazzles
the falcon's sensitive eyesight.

An individual target
may be a better option.

A peregrine's plumage
is not properly waterproof,

so he can't afford to get
his feathers wet.

He must flush his prey into the air.

But as soon as he gets close,

the waders ditch into
the sea where he can't follow.

Success depends on keeping his prey
away from the water.

Now it's a dogfight at
close quarters.

Peregrines only stay around estuaries

for the few months
the waders are there.

As soon as their prey leaves,
they will head back inland.

Some animals come to the coast,
not to feed

but to have their young.

SEA LION CALLS

Patagonian sea lions.

These are just a few months old.

Sea lions can't give birth at sea,

they must come to land
to have their pups.

Each summer, thousands cluster in
colonies

along Argentina's Valdes Peninsula.

The mothers regularly return to
sea to hunt...

..but their young stay on the beach

for they have not
yet learnt to swim.

Orca. Killer whales.

They come at exactly the same
time each year to hunt the pups.

It's a narrow window of opportunity

and the odds are stacked
against the hunters.

Just like the dolphins,

orca take great risks in leaving
their natural habitat.

With every attack, there's a
real danger of being stranded.

Orca can only hunt for
a few hours each day,

because at low tide a rocky reef
blocks their access to the beach.

So until the tide is high,
the pups are safe.

Early in the season the orca have
one big advantage...

..the pups are naive and don't yet
recognise the whales as a threat.

But the young sea lions will
learn quickly.

Silently, the killer whales
move into position.

Less than half the attacks are
successful

and with each attempt,
the pups grow wiser.

The orca's advantage is
slipping away.

For the next few weeks,

hunter and hunted are locked
in a desperate race.

The orca to seize pups,

and the sea lions to learn how to
evade their attacks.

These young sea lions have triumphed.

They've learnt to recognise
the danger and evade the killers.

For the orca,

the window of opportunity has
closed for another season.

Newfoundland, Canada.

A unique seasonal event is about to
transform this place.

It is the greatest coastal breeding
spectacle on the planet,

but it will only last a week or two.

Capelin.

Billions of them.

In early summer,
these tiny fish mass just offshore.

The great shoals inevitably attract
predators.

Humpback whales.

They've travelled over 3,000 miles

from their breeding grounds
in the Caribbean.

Nowhere else in the world

do humpback whales gather
to feed in greater numbers.

But no sooner have the whales arrived

than the capelin do
something apparently suicidal.

They deliberately cast
themselves ashore,

and, once out of water,
they lay their eggs.

They're one of only
two species of fish

that leave the ocean to
spawn like this.

A fish out of water is an easy meal.

But capelin go to these
extreme lengths

to give their offspring
the best chance of survival.

For many,
it's the ultimate sacrifice.

Cod.

Great numbers of them
move in from deeper water

to plunder this brief bounty.

Their impact on the
vast shoals is small

but as they hunt, the cod drive
capelin off the seabed

and up into the range
of the waiting humpbacks.

The whales herd
the fish against the cliffs.

Then they unleash a secret weapon.

ERRATIC WHALE SOUNDS

These bizarre calls
panic the capelin,

driving the fish ever
closer together,

making them a more
concentrated target.

ERRATIC WHALE SOUNDS CONTINUE

This bonanza will disperse
within days,

so the humpbacks have to make
the most of it while they can.

Hunters at the coast are always
in a race against time.

The Hunt team came to Chile to film
the world's smallest sea mammal...

..the South American marine otter.

The thing about these otters

is no-one really knows
anything about them.

No-one's actually studied them
for any length of time at all.

So Mark is going to have to work out

the otters' movements
and habits for himself.

These otters have never
been filmed before,

but Mark has a lot of experience
with British otters

so it should be straightforward.

Filming them underwater, however,
is a daunting prospect -

no-one has ever tried
to dive with them.

It's not going to be easy. Maybe one
shot a day, two shots a day

would be a successful trip.

But the underwater team has a plan.

Now, what we've got are these
camouflaged wet suits,

camouflage tape on the camera,

just to try and help us to blend in
a little bit more.

And so does Mark.

Well, you probably can't actually
see me now, of course,

covered in camo.

But going to work,
definitely going to work.

Much better than Pearson's camo
wet suit palaver!

Grown men dressed like that,
it's ridiculous.

We can't just get into the
water and see them

because they move too quickly.

So I've got this little comms unit
inside of my mask

and I can listen to it underwater.

Joaquin can talk to me from
the search.

Oh, there's one.

JOAQUIN: He's going west under
rock one.

I repeat, west under rock one.

He's on the surface,
swimming really fast to three.

A combination of eyes
on the surface...

He's coming back to two.

..and camouflage below
brings early results.

Filming otters underwater is turning
out to be easier than Doug expected.

That was cool.

I wasn't sure we were going to see
one of these guys underwater

but, yeah, very encouraging.

Success for the underwater team

means the pressure is now on Mark.

I've been here six-and-a-half hours

and I've got one shot.

Not very good shot of it
on a rock over there.

It's not going to work.

It's not going to work like that.

I think the only way that we're
going to get any more

is to find out a way of getting
consistently close to them.

I think the only way of doing that
is at a den

where there's cubs and they're
coming back to it consistently.

Surprisingly, the most likely
den site is in a busy harbour.

So we are just by the den of the
otters

and we are going to put the
hide on location

to hopefully get some shots
of the otter up close.

It's just a very weird mixture of,
like, trying to hide from the animal

when in fact it just sees
people all the time.

Doesn't quite add up.

Right, well, you can just leave me
in here now. I'm quite happy.

Just send me down empanadas
every few hours.

See if you can have a word with
the otters,

tell them that dinner's up.

I've been sat here now for
three hours, looking at a rock.

After a week of surveillance...

Where's it gone, where is it,
where is it, where is it?

..Mark is no closer to figuring out
any pattern

in the otters' behaviour.

Oh, don't do that.

He's had only fleeting glimpses
of the adults and no cubs.

The weird thing is,
I've filmed otters in Scotland

and so I've been equating those
otters with these otters.

The more you find out
about these otters,

you realise that they're just
not similar at all.

All your tactics that you
thought would work with otters

are just straight out the window,

so it's like starting again.

News of another otter family
nearby raises Mark's hopes.

(It's going to happen.)

The day starts out with promise.

ON RADIO: 'I've just seen
one of the cubs in the den.

'Just for...
It was about half a second.'

That's great news. Over.

But the sun brings out
unwelcome visitors.

Ah, yeah, there's been one around.
About three hours ago,

but a few people have turned up
on the beach

and we haven't seen it since.

The topside shoot is proving to be
much more difficult

than anyone could have imagined.

This is rather depressing

because it's the only place that we
have been able to actually see cubs.

The big worry, really, is that the
cubs are being moved

from den to den.

If they are being moved from
den to den,

then staking the dens out
is almost impossible.

Such are the challenges of trying
to film an animal

about which we know so little.

With all their options exhausted,

Mark and Ignacio dismantle
their hide in the harbour.

Wow! Wow!

Oh, my... What the...?

The hide that was supposed to be for
Mark has been used by the otters.

Look at his face!

I can't believe it.

They've been using
the hide as a larder for their food.

I've never felt so utterly defeated

by an animal
that I've tried to film.

After two months, I still
have no idea about these animals.

Really no idea.

I thought that was an otter, then!

I just went to see in another cove
this early morning,

and I just found two little cubs
playing in the water with one adult.

What?

We've finally got within 100 metres
of a mother and cubs.

Through sheer persistence,

Mark finally gets his chance
to film an otter family.

You know, they don't
feel like mammals,

they're almost like little eels,

you know, the way they disappear
underneath the boulders.

I think we've genuinely revealed
something new about them -

how they hunt.

You know, they go through
these rocks

and that's why they're so small.

What makes the otters successful
hunters on this coast

is also what makes them
so hard to film...

..they're small, fast and have an
affinity for nooks and crannies.

And Mark?

He's finally learnt the secret

to filming the world's smallest
marine mammal.

Keep the faith.

Yeah, keep the faith.

Next time, in the final episode,

we examine the health
of our planet's top predators.

We meet the pioneers
on the front-line,

searching for bold solutions.

Can people make room for the world's
most celebrated hunters?

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