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[CAWING]
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NARRATOR:
It's a universal dream...
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...to fly like a bird.
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To soar on wings into the heavens.
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[HONKS]
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But it's nothing compared to the reality.
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[AIR WHISTLING]
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Experience our planet as never before:
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Through the eyes of birds.
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[PEEPING]
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This is a journey
that will embrace the world.
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A flight across the earth
on feathered wings.
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It's a fantastic voyage...
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...following the changing seasons...
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...and taking in some
of the greatest events on Earth.
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Experience a year
in the life of our planet...
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...from the lush tropics...
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...to the frozen North...
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...and catch a glimpse of our world...
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...as never before:
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From a bird's-eye view.
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[HONKING]
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It's spring in North America...
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...and families of snow geese
begin an epic 2000-mile journey...
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...across the continent.
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[STEAMBOAT HORN BLARING]
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They've spent the winter
in the far South, but now...
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...they have to fly
all the way to the Arctic to breed.
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They won't be traveling alone.
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[HONKING]
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They join other snow geese families...
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...united by a common goal.
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The flock grows in strength...
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...until snow geese...
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...fill the sky.
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Then hundreds become thousands.
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Within a few days...
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...their ranks are over a million strong.
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They gather at these
traditional staging posts...
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...to wait for the perfect weather
and favorable winds...
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...that will help power their migration.
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They become a vast army...
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...ready to take over a continent.
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[HONKING]
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But where flocks gather...
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...so do predators.
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The bald eagle.
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America's national bird.
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A creature of cunning and power...
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...and the Hook's greatest enemy.
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There is safety in numbers.
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Many eyes to watch for danger.
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They react as one...
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...the message rippling
through the flock.
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The eagle appears spoiled for choice.
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But it's not that easy.
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Their sheer numbers confuse the predator.
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They form a blizzard of geese...
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...impossible to target or see through.
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[AIR WHISTLING]
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She must try her luck elsewhere.
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[DUCK QUACKING]
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[SCREECHING]
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True skill comes from years of practice.
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What goes down
must come up.
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[DUCK SQUAWKING]
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With a fair wind blowing...
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...the snow geese
take their cue to leave.
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[HONKING]
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They become part
of a spring migration...
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...across a greening continent...
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...one that features
millions of other birds.
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In Europe, common cranes
crossing the Mediterranean...
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...lead a similar mass
invasion from Africa.
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Like snow geese,
they travel as a family...
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...the younger birds gaining
from the knowledge of their parents.
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They'll spend the next three weeks
traveling to their breeding grounds...
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...on a continent now blossoming with life.
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[HONKING]
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They follow traditional routes,
a flight path that, for many...
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...includes Western Europe's
largest river delta.
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The Camargue in France.
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Below are the famous white horses...
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...an ancient breed...
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...that has roamed
the sea marshes for centuries.
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[HORSES WHINNYING]
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[WHINNYING]
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As well as horses...
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...the marshes provide shelter
for a wealth of birdlife.
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Four hundred varieties in all.
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The cranes speed onwards
to Northern Europe.
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They still have a journey
of 1500 miles to go.
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[HONKS]
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To keep on course...
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...birds use a magnetic sense...
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...that tells them their position
at any one time.
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00:10:36,344 --> 00:10:38,676
They also use the sun
as a compass point...
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...even allowing for its changing position
as it arcs across the sky.
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But despite a sophisticated
navigation system...
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...they prefer to trust their eyes.
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Landmarks, such as Chateau
de Chenonceau in the Loire Valley..
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...are used as a guide
from year to year.
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Young birds on their first migration
can see a landmark just once...
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...and remember it for a lifetime.
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[HONKS]
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One day, they'll use such sites
to guide their own families.
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Below, the trout in the river...
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...are full of the joys of spring.
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But not for long.
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A migrating osprey had spied...
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...his meal from above.
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But there's always one that gets away.
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He plunges at 50 miles per hour.
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It's this seasonal abundance of prey...
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...that makes the osprey's 5000-mile
journey from southern Africa...
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...worth all the effort.
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Over the Baja Peninsula
at the southern tip of North America...
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...another spring gathering
is assembling.
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Brown pelicans are attracted
by the vast anchovy shoals...
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...that migrate to these rich waters
at this time of year.
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The drab juveniles are still
learning the ways of the ocean.
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They rely on their more colorful
elders to show them the way.
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The youngsters watch
their every move...
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...benefiting from their greater
experience and wisdom.
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They must understand
the habits of every sea creature...
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...that might lead them to a meal.
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Humpback whales have traveled...
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...two and a half thousand miles
from the Arctic...
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...to breed here.
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Adult pelicans know
that whales announce their arrival...
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...by breaching.
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For the younger birds,
it's a new and baffling sight.
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But by learning
to follow whales...
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...pelicans are often
rewarded with a meal.
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00:16:34,368 --> 00:16:36,450
But today, these ocean giants...
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...have courtship on their minds.
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00:16:40,875 --> 00:16:44,664
The pelicans must find
alternative guides to food.
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They can appear without warning.
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Devil rays.
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A sea creature
that seems to envy the birds.
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Why they take flight is a mystery.
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Some think it's to shed parasites.
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More likely...
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...the splashes
corral fish and plankton...
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...making them easier to catch.
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00:17:58,202 --> 00:18:00,443
It's tempting to think
they do it just for fun.
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But wherever rays are fishing...
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...there's food for pelicans too.
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On a good day, their pouches...
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...can trap three gallons
of fish and water...
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...in a single gulp.
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00:19:17,031 --> 00:19:20,990
Like most birds, the pelican's seasonal
journeys are driven both by food...
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...and the desire to breed.
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[HONKING]
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Back in the U.S.A...
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...the snow geese
have traveled northwards nonstop...
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...for over a thousand miles.
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00:19:42,640 --> 00:19:46,099
Exhaustion is already taking its toll.
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00:19:50,189 --> 00:19:53,602
Ahead lies their greatest challenge.
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Monument Valley in Arizona.
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00:20:12,002 --> 00:20:13,458
For a tired family...
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00:20:13,713 --> 00:20:17,547
...this unforgiving desert
is a dangerous place to be.
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The valley is all that is left
of an ancient seabed...
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00:20:42,867 --> 00:20:45,609
...but there's no water here now.
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The pinnacles were formed
through the action of wind.
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Some now rise a thousand feet
above the valley floor.
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For the migrating birds...
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...this awe-inspiring landscape...
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...provides no comfort at all.
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The effort is relentless.
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[AIR WHISTLING]
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For every breath they take...
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...their wings beat three times.
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Once their fat reserves are gone...
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...they will start to metabolize muscle.
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But despite the young birds' fatigue...
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...the parents must keep
to a tight schedule...
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...to reach their nesting grounds
with enough time to breed.
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They drive...
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...their flagging family on.
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00:22:12,873 --> 00:22:16,537
They have no plans
to break the grueling journey.
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But birds are masters
of the wind and air.
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00:22:35,855 --> 00:22:39,393
And the sandstone buttresses
deflect the slightest breeze...
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[WIND RUSTLING]
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...giving the family a free ride
to the main flock above.
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00:22:50,202 --> 00:22:51,567
But they still have another...
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...thousand miles to go.
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[HONKING]
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For countless other travelers...
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...their migration has barely begun.
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On the southern tip of Africa...
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...a bird's-eye view
of Cape Town's Table Mountain...
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...gives no hint of what's stirring
in the seas far offshore.
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Beneath the waves...
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00:23:24,612 --> 00:23:28,355
...the greatest fish migration
on the planet has begun...
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00:23:28,616 --> 00:23:30,152
...and Cape gannets...
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00:23:30,409 --> 00:23:31,945
...are already on its trail.
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[CAWING]
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The gannets have thousands
of square miles of ocean to search...
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00:23:48,552 --> 00:23:51,965
...so they need help
in tracking them down.
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00:23:56,852 --> 00:23:58,058
The common dolphin...
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[BELLOWS]
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...a creature
with an unrivaled knowledge...
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...of the undersea world.
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00:24:10,783 --> 00:24:15,493
The two species work as a team,
sharing their specialized skills.
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00:24:20,334 --> 00:24:23,417
Dolphins search beneath the waves...
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00:24:24,838 --> 00:24:27,671
...while the gannets
are the eyes in the sky.
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00:25:00,833 --> 00:25:02,665
It's the bird's view
that first spots...
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...the hidden gathering.
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00:25:09,341 --> 00:25:11,457
They arrow towards it...
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...at 70 miles per hour.
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[CAWING]
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00:25:40,330 --> 00:25:43,322
Sixty feet down, they reach their target:
214
00:25:43,584 --> 00:25:45,541
The great sardine run.
215
00:25:51,550 --> 00:25:54,713
But at this depth,
the sardines are a struggle to catch.
216
00:25:57,431 --> 00:25:59,422
The gannets come up with nothing.
217
00:26:04,938 --> 00:26:07,896
But the dolphins corral the sardines...
218
00:26:08,150 --> 00:26:10,437
...driving them to the surface.
219
00:26:17,034 --> 00:26:19,275
Now they're not only easier
for the dolphins...
220
00:26:19,536 --> 00:26:22,324
...to catch,
they're in easy reach of the gannets.
221
00:26:25,751 --> 00:26:27,583
By working together,
the gannets and dolphins...
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00:26:27,836 --> 00:26:29,702
...mount an air and sea assault
with no parallel...
223
00:26:29,963 --> 00:26:32,375
...in the natural world.
224
00:27:05,165 --> 00:27:06,951
It's this seasonal banquet...
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00:27:07,209 --> 00:27:10,452
...that drives the birds' whole existence.
226
00:27:23,934 --> 00:27:25,299
With bellies full...
227
00:27:25,561 --> 00:27:28,223
...the hunters return to Bird Island...
228
00:27:28,480 --> 00:27:32,223
...the biggest Cape gannet colony
in the world.
229
00:27:35,821 --> 00:27:39,405
Sixty-five thousand
breeding pairs in all.
230
00:27:51,378 --> 00:27:52,743
The gannets' success...
231
00:27:53,005 --> 00:27:55,918
...entirely depends
on timing their breeding cycle...
232
00:27:56,175 --> 00:27:59,213
...to one great seasonal event.
233
00:28:06,018 --> 00:28:06,974
Back in Europe...
234
00:28:07,227 --> 00:28:09,844
...the bulb fields of Holland
are in bloom...
235
00:28:10,105 --> 00:28:13,063
...showing that spring
has well and truly arrived.
236
00:28:20,657 --> 00:28:21,692
It's also a sign...
237
00:28:21,950 --> 00:28:25,534
...that the cranes'
breeding grounds are not far away.
238
00:28:30,167 --> 00:28:32,124
[SQUAWKS]
239
00:28:53,774 --> 00:28:55,811
This Technicolored landscape...
240
00:28:56,068 --> 00:28:58,935
...was reclaimed from salt marshes.
241
00:29:07,579 --> 00:29:11,038
In the past,
cranes would've stopped here to breed.
242
00:29:11,291 --> 00:29:13,282
Nowadays,
they keep on traveling...
243
00:29:13,543 --> 00:29:17,127
...to where natural marshes
can still be found.
244
00:29:24,972 --> 00:29:28,135
Having flown 3000 miles
from North Africa...
245
00:29:28,392 --> 00:29:29,632
...the family arrive...
246
00:29:29,893 --> 00:29:33,102
...at their final destination
in Sweden.
247
00:29:37,985 --> 00:29:41,853
Here, they will finally settle
for the summer to breed.
248
00:29:46,368 --> 00:29:49,326
The cranes' journey has ended for now...
249
00:29:49,579 --> 00:29:51,240
...and across the rest of Europe...
250
00:29:51,498 --> 00:29:55,457
...millions of other migrants
are just arriving from Africa.
251
00:29:56,545 --> 00:30:00,539
[SWALLOWS TWEETING]
252
00:30:10,100 --> 00:30:12,842
Barn swallows
are among the most celebrated.
253
00:30:13,103 --> 00:30:15,765
Few can equal their aerobatic skills.
254
00:30:16,481 --> 00:30:19,644
They even drink without missing a beat.
255
00:30:48,221 --> 00:30:51,805
They've traveled over 6000 miles
from South Africa...
256
00:30:52,059 --> 00:30:54,767
...to return to this English farm
where they were born.
257
00:31:00,609 --> 00:31:02,691
They were well-equipped
for the journey.
258
00:31:02,944 --> 00:31:05,402
Their long, pointed wings
and forked tail...
259
00:31:05,655 --> 00:31:08,864
...give them unrivaled flight control.
260
00:31:09,826 --> 00:31:11,692
The males arrive first.
261
00:31:11,953 --> 00:31:15,821
Their job is to repair the nest
before the females return.
262
00:31:19,169 --> 00:31:22,878
After a six-week flight,
they'll take any meal on offer.
263
00:31:25,675 --> 00:31:28,133
[BUZZING]
264
00:31:46,405 --> 00:31:49,363
Some nests have been in the family
for 50 years...
265
00:31:49,616 --> 00:31:52,950
...and like all old properties,
they need a spot of renovation.
266
00:31:54,037 --> 00:31:56,028
[CLUCKS]
267
00:31:58,083 --> 00:32:01,292
The right materials are everything.
268
00:32:12,097 --> 00:32:15,681
A lining of feathers will do nicely.
269
00:32:39,541 --> 00:32:43,125
Summer is also underway
in North America.
270
00:32:43,378 --> 00:32:45,619
By now, birds have set up home...
271
00:32:45,881 --> 00:32:48,418
...in every corner of the continent.
272
00:32:51,261 --> 00:32:54,003
The Grand Canyon
provides perfect conditions...
273
00:32:54,264 --> 00:32:55,470
...for those that soar.
274
00:32:59,644 --> 00:33:03,638
[AIR WHISTLING]
275
00:33:06,276 --> 00:33:08,392
A bald eagle...
276
00:33:08,653 --> 00:33:12,612
"effortlessly rides the air currents
that swirl around the crater's rim.
277
00:33:12,866 --> 00:33:14,402
[EAGLE SCREECHING]
278
00:33:14,659 --> 00:33:16,241
Apart from updrafts of air...
279
00:33:16,495 --> 00:33:20,284
...this barren gorge appears to offer little
for a water-loving eagle.
280
00:33:31,801 --> 00:33:35,465
But these huge canyons
were carved out by water...
281
00:33:35,722 --> 00:33:39,716
...and down below,
the mighty Colorado still flows.
282
00:33:47,400 --> 00:33:48,686
Eagles master the air...
283
00:33:48,944 --> 00:33:50,730
...by using their feathers to sense...
284
00:33:50,987 --> 00:33:53,604
...and react to the slightest updraft.
285
00:33:55,200 --> 00:33:58,283
By understanding
the way the landscape shapes the wind...
286
00:33:58,537 --> 00:34:01,620
...they use little energy looking for a meal.
287
00:34:19,599 --> 00:34:22,637
The Colorado has sustained life
in these deserts...
288
00:34:22,894 --> 00:34:26,103
...for the last 17 million years.
289
00:34:34,114 --> 00:34:36,572
It still feeds a growing population...
290
00:34:36,825 --> 00:34:38,315
...of bald eagles today.
291
00:34:43,290 --> 00:34:46,282
[EAGLE SCREECHING]
292
00:34:52,090 --> 00:34:54,297
Wherever there's an opportunity...
293
00:34:54,551 --> 00:34:55,791
...birds will grasp it...
294
00:34:56,052 --> 00:34:58,635
...and reap the rewards.
295
00:35:23,788 --> 00:35:25,574
The marshlands of South Carolina...
296
00:35:25,832 --> 00:35:29,291
...provide an unusual opportunity
for another fish hunter.
297
00:35:41,556 --> 00:35:42,296
The great egret...
298
00:35:42,557 --> 00:35:45,265
...could teach the eagle
a thing or two about fishing.
299
00:35:51,149 --> 00:35:54,437
[DOLPHIN SNORTING]
300
00:35:54,694 --> 00:35:57,061
They let dolphins do all the work.
301
00:36:05,163 --> 00:36:09,122
The egrets shadow their subjects,
waiting for them to corral the fish.
302
00:36:10,335 --> 00:36:13,373
Then, in one explosive charge...
303
00:36:14,881 --> 00:36:18,419
...the dolphins drive the fish ashore.
304
00:36:19,594 --> 00:36:22,586
[EGRETS SQUAWKING]
305
00:36:33,024 --> 00:36:36,858
As their prey flounder,
the dolphins scoop them up.
306
00:36:43,576 --> 00:36:47,114
And so do the hungry egrets.
307
00:36:52,627 --> 00:36:55,915
Stranding
is a dolphin's worst nightmare...
308
00:36:56,172 --> 00:36:59,255
...but this pod
has made it their specialty.
309
00:37:15,483 --> 00:37:18,316
[SQUAWKS]
310
00:37:25,285 --> 00:37:28,698
The young dolphins
learn the knack from their parents...
311
00:37:29,914 --> 00:37:33,157
...as do the egrets that follow them.
312
00:38:08,703 --> 00:38:10,819
With food so easy to come by...
313
00:38:11,080 --> 00:38:14,368
...the egrets have become experts
on the dolphins' behavior...
314
00:38:14,626 --> 00:38:17,618
...and no longer fish for themselves.
315
00:38:26,805 --> 00:38:30,594
Countless other birds rely on a similar
knowledge of other creatures...
316
00:38:30,850 --> 00:38:33,057
...to find their food.
317
00:38:37,899 --> 00:38:41,108
As summer reaches its height
in the northern hemisphere...
318
00:38:41,361 --> 00:38:45,195
...South Africa hosts an even more
astonishing feeding event.
319
00:38:51,120 --> 00:38:53,953
The kelp gull knows exactly
when it's about to occur...
320
00:38:54,207 --> 00:38:57,575
...and sets off to Seal Island
near Cape Point.
321
00:38:59,963 --> 00:39:03,046
Here, 10,000 Cape fur seals...
322
00:39:03,299 --> 00:39:05,290
...gather to breed.
323
00:39:07,095 --> 00:39:10,087
[GULLS CAWING]
324
00:39:11,182 --> 00:39:12,718
The gulls are opportunists...
325
00:39:12,976 --> 00:39:15,593
...scavenging a meal
wherever they can.
326
00:39:15,854 --> 00:39:19,848
But by studying the seals,
they are guaranteed a feast.
327
00:39:21,025 --> 00:39:23,016
[S EALS BARKI N G]
328
00:39:24,153 --> 00:39:26,815
The gulls wait until the seal pups
are brave enough...
329
00:39:27,073 --> 00:39:29,656
...to venture away from the island.
330
00:39:37,250 --> 00:39:40,368
They follow as the youngsters
enjoy their nevvfound freedom.
331
00:40:15,288 --> 00:40:18,155
The young seals
are oblivious to danger...
332
00:40:19,208 --> 00:40:22,200
...but the gulls know otherwise.
333
00:40:29,761 --> 00:40:32,628
A great white shark.
334
00:40:35,016 --> 00:40:37,007
Just what the gulls were expecting:
335
00:40:37,268 --> 00:40:40,806
A buffet of seal meat,
there for the taking.
336
00:40:41,940 --> 00:40:43,647
[CAWING]
337
00:40:51,574 --> 00:40:55,317
In July, great whites migrate
to feed on the novice seals...
338
00:40:55,578 --> 00:40:59,071
...attacking up to 40 times a day.
339
00:42:54,906 --> 00:42:56,522
As the year moves on...
340
00:42:56,783 --> 00:42:58,273
...it's East Africa's turn...
341
00:42:58,534 --> 00:43:00,901
...to host another great event.
342
00:43:05,291 --> 00:43:08,784
Vultures circle above the Great Plains...
343
00:43:10,922 --> 00:43:14,586
...spiraling upward
in thermals of hot air.
344
00:43:25,978 --> 00:43:29,972
[AIR WHISTLING]
345
00:43:30,358 --> 00:43:33,225
Her broad wings ride the air for hours...
346
00:43:33,486 --> 00:43:36,649
...as she searches for the dead or done for.
347
00:43:41,452 --> 00:43:44,945
Every feather reacts
to the tiniest breath of air...
348
00:43:45,206 --> 00:43:48,449
...adjusting its angle
to perfect the vulture's flight.
349
00:43:52,380 --> 00:43:55,498
She splays her wingtip feathers
to reduce drag...
350
00:44:01,472 --> 00:44:04,590
...and uses her tail to steer.
351
00:44:14,360 --> 00:44:18,149
She is here for one thing only:
352
00:44:19,157 --> 00:44:23,116
The greatest mass movement
of mammals on the planet.
353
00:44:29,167 --> 00:44:31,704
By August, half a million wildebeests...
354
00:44:31,961 --> 00:44:33,747
...cross the Serengeti plains...
355
00:44:34,005 --> 00:44:37,498
...and arrive in Kenya's Maasai Mara.
356
00:44:43,472 --> 00:44:44,962
And with perfect timing...
357
00:44:45,224 --> 00:44:47,807
...their scavengers unerringly follow.
358
00:44:56,777 --> 00:44:59,109
The vulture watches the herds...
359
00:44:59,363 --> 00:45:01,855
...looking for signs of weakness.
360
00:45:02,617 --> 00:45:06,611
[GRUNTING]
361
00:45:08,289 --> 00:45:11,281
She also studies
the wildebeests' predators.
362
00:45:15,630 --> 00:45:18,213
But in the high-stakes world
of the African bush...
363
00:45:18,466 --> 00:45:22,050
...the watched also do the watching.
364
00:45:22,303 --> 00:45:24,294
[GROWLS]
365
00:45:32,563 --> 00:45:35,476
There is an uneasy alliance
between vultures and lions...
366
00:45:36,275 --> 00:45:40,018
...as both spy on one another
to find fresh meat.
367
00:45:49,789 --> 00:45:53,373
But today, the vulture won't need
the lion's help.
368
00:45:53,626 --> 00:45:57,620
[AIR WHISTLING]
369
00:46:06,514 --> 00:46:09,882
The torrential waters of the Mara River
are about to present...
370
00:46:10,142 --> 00:46:13,806
...an opportunity
that happens just once a year.
371
00:46:28,661 --> 00:46:32,279
The vulture simply has to
keep her wits about her.
372
00:46:35,084 --> 00:46:38,372
The wildebeests must cross the river
to reach their breeding grounds...
373
00:46:38,629 --> 00:46:41,166
...on the short grass plains.
374
00:46:43,467 --> 00:46:45,583
[AIR WHISTLING]
375
00:46:45,845 --> 00:46:49,679
It's the most dangerous time
of their lives.
376
00:47:23,924 --> 00:47:27,883
The vulture just needs
one more piece of the puzzle.
377
00:47:28,137 --> 00:47:30,048
[GROWLS]
378
00:47:30,306 --> 00:47:33,549
The crocs have waited a year
for this moment.
379
00:47:34,602 --> 00:47:38,266
Their prey doesn't suspect a thing.
380
00:48:34,036 --> 00:48:36,949
The vultures simply fly downstream...
381
00:48:37,206 --> 00:48:40,369
...where the bodies are duly delivered.
382
00:48:44,797 --> 00:48:48,290
There is no rest for the wicked.
Now the arguing begins.
383
00:48:49,468 --> 00:48:52,460
[SCREECHING]
384
00:49:20,249 --> 00:49:24,243
Outnumbered,
a marabou stork bides his time.
385
00:49:27,965 --> 00:49:30,923
Eventually, everyone gets their fill.
386
00:49:31,177 --> 00:49:32,167
In a few days...
387
00:49:32,428 --> 00:49:35,216
...they will follow the herd south
and be gone.
388
00:49:43,814 --> 00:49:47,808
Just a little further north
lies the Great Rift Valley...
389
00:49:50,112 --> 00:49:54,106
...home to one of the most graceful birds
in the world.
390
00:49:58,120 --> 00:50:02,079
The lesser flamingo
is a restless traveler...
391
00:50:03,000 --> 00:50:06,493
“constantly searching
for the perfect lake.
392
00:50:15,137 --> 00:50:19,131
Today, most of the world's population
have chosen Lake Bogoria...
393
00:50:19,391 --> 00:50:21,302
...in northern Kenya.
394
00:50:28,651 --> 00:50:32,394
This is one of the greatest gatherings
ever seen.
395
00:50:34,657 --> 00:50:37,991
A total of two million birds.
396
00:50:42,623 --> 00:50:45,866
They fringe the lake
with a ribbon of pink...
397
00:50:46,126 --> 00:50:48,584
...but this beauty is deceptive.
398
00:50:55,928 --> 00:50:59,922
Here, volcanic springs
poison the tranquil waters.
399
00:51:07,940 --> 00:51:09,931
They create a caustic brew...
400
00:51:10,192 --> 00:51:12,934
...killing most forms of water life.
401
00:51:18,742 --> 00:51:21,325
However, the same
alkaline conditions...
402
00:51:21,579 --> 00:51:24,992
...allow a special algae to flourish.
403
00:51:28,252 --> 00:51:31,335
And it's the flamingos' only food.
404
00:51:38,345 --> 00:51:40,336
Their curved bills and long necks...
405
00:51:40,598 --> 00:51:43,215
...are designed to extract it
from the lake.
406
00:51:46,979 --> 00:51:48,561
The bill acts as a sieve...
407
00:51:48,814 --> 00:51:51,272
...filtering the algae from the water.
408
00:51:55,154 --> 00:51:57,737
The flamingos appear, as if by magic...
409
00:51:57,990 --> 00:52:00,357
...whenever the algae bloom.
410
00:52:05,080 --> 00:52:08,323
For a brief time,
among these steaming vents...
411
00:52:08,584 --> 00:52:11,451
...they find their Shangri-La.
412
00:52:14,590 --> 00:52:16,797
But there is trouble in paradise.
413
00:52:18,385 --> 00:52:20,843
The African fish eagle.
414
00:52:21,096 --> 00:52:25,055
[AIR WHISTLING]
415
00:52:33,275 --> 00:52:36,233
No fish survive in this toxic lake...
416
00:52:36,487 --> 00:52:39,650
...so it hunts flamingos instead.
417
00:52:52,711 --> 00:52:54,748
It flushes its prey.
418
00:53:08,602 --> 00:53:11,720
In the air, weaker birds
are easier to spot.
419
00:53:29,456 --> 00:53:31,743
A victim is found.
420
00:53:34,878 --> 00:53:37,870
[FLAMINGO SQUAWKING]
421
00:53:44,138 --> 00:53:47,972
For the survivors, peace briefly returns.
422
00:53:51,270 --> 00:53:53,728
But flamingos
never really stop traveling.
423
00:53:53,981 --> 00:53:57,975
Their life is a continual quest
for the perfect lake.
424
00:54:03,240 --> 00:54:06,949
On the other side of the world,
in the heart of South America...
425
00:54:07,202 --> 00:54:10,069
...lies the vast Amazon jungle.
426
00:54:10,330 --> 00:54:13,448
It's home to yet more
colorful travelers.
427
00:54:20,215 --> 00:54:23,958
Like flamingos, scarlet macaws
are always on the move.
428
00:54:24,678 --> 00:54:26,635
But their seasonal journeys
are governed...
429
00:54:26,889 --> 00:54:29,881
...by the fruiting of rainforest trees.
430
00:54:37,566 --> 00:54:40,558
[SQUAWKING]
431
00:54:42,321 --> 00:54:44,608
But they have a problem.
432
00:54:44,865 --> 00:54:47,402
In the dry season,
fruit is less available...
433
00:54:47,659 --> 00:54:48,820
...and the alternative food...
434
00:54:49,077 --> 00:54:51,159
...is often full of poisons.
435
00:54:51,413 --> 00:54:54,155
They need to find a cure
for the indigestion they get...
436
00:54:54,416 --> 00:54:57,374
...from their less-than-perfect diet.
437
00:55:04,384 --> 00:55:05,374
The secret remedy...
438
00:55:05,636 --> 00:55:08,503
...can be found
alongside the river.
439
00:55:10,682 --> 00:55:13,891
But others have got here first.
440
00:55:14,144 --> 00:55:17,136
[CHIRPING]
441
00:55:18,273 --> 00:55:19,013
Mealy parrots...
442
00:55:19,274 --> 00:55:20,514
...descend in droves...
443
00:55:20,776 --> 00:55:23,484
...seeking the same popular cure.
444
00:55:31,745 --> 00:55:35,488
Their presence is good news
to the scarlet and green macaws.
445
00:55:40,712 --> 00:55:42,953
It means that there are
no predators around.
446
00:55:48,178 --> 00:55:49,088
But if the coast...
447
00:55:49,346 --> 00:55:53,010
...is clear, the macaws expect
to have the place to themselves.
448
00:55:53,267 --> 00:55:55,178
And mealies know their place...
449
00:55:55,435 --> 00:55:56,846
...in the pecking order.
450
00:56:05,362 --> 00:56:09,356
[SQUAWKING]
451
00:56:12,411 --> 00:56:13,617
Like the other parrots...
452
00:56:13,871 --> 00:56:15,987
...the macaws are here
for one thing only:
453
00:56:21,920 --> 00:56:23,410
Mud.
454
00:56:29,428 --> 00:56:31,544
But this is no ordinary mud.
455
00:56:31,805 --> 00:56:33,887
It's one that neutralizes the poisons...
456
00:56:34,141 --> 00:56:36,257
...in their rainforest diet.
457
00:56:38,312 --> 00:56:40,519
The clay not only settles
their stomachs...
458
00:56:40,772 --> 00:56:42,433
...it provides them with the nutrients...
459
00:56:42,691 --> 00:56:44,853
...missing from their food.
460
00:56:56,955 --> 00:56:59,287
Macaws are argumentative birds...
461
00:56:59,541 --> 00:57:02,875
...and the best spots
are keenly fought over.
462
00:57:27,235 --> 00:57:29,897
But they are surprisingly nervous too...
463
00:57:30,155 --> 00:57:33,898
...especially when
some unwelcome visitors arrive.
464
00:57:36,912 --> 00:57:39,449
Spider monkeys.
465
00:57:46,296 --> 00:57:47,286
They're hardly a danger...
466
00:57:47,547 --> 00:57:51,336
...but their unruly antics
put the birds on edge.
467
00:57:53,887 --> 00:57:57,846
It's now the monkeys' turn
to raid the jungle medicine chest.
468
00:58:08,151 --> 00:58:11,360
And the macaws just travel on.
469
00:58:18,996 --> 00:58:21,579
As the summer ends in North America...
470
00:58:21,832 --> 00:58:25,041
...some bald eagles
stop over in British Columbia...
471
00:58:25,293 --> 00:58:28,411
...before beginning
their long journey south again.
472
00:58:29,548 --> 00:58:32,540
[SCREECHING]
473
00:58:37,472 --> 00:58:39,884
Like all birds,
they have an unerring ability...
474
00:58:40,142 --> 00:58:43,009
...to be in the right place
at the right time.
475
00:58:43,270 --> 00:58:47,264
[AIR WHISTLING]
476
00:58:53,238 --> 00:58:55,570
Young eagles learn these tricks
of survival...
477
00:58:55,824 --> 00:58:57,906
...by following the adults.
478
00:59:01,163 --> 00:59:03,951
[TRILLING]
479
00:59:05,542 --> 00:59:07,408
An older eagle has seen it all before.
480
00:59:07,669 --> 00:59:09,876
[AIR WHISTLING]
481
00:59:16,720 --> 00:59:18,927
He knows the exact time...
482
00:59:19,181 --> 00:59:21,422
...that salmon arrive
from the ocean to breed.
483
00:59:24,644 --> 00:59:27,727
It's a skill he shares with bears.
484
00:59:35,864 --> 00:59:37,275
[SCREECHES]
485
00:59:37,741 --> 00:59:39,903
It's wise to be cautious.
486
00:59:41,119 --> 00:59:44,487
Grizzly bears don't like sharing
their meals.
487
00:59:59,096 --> 01:00:01,087
[EAGLE SCREECHES]
488
01:00:05,685 --> 01:00:08,097
A young eagle also holds back...
489
01:00:08,355 --> 01:00:10,221
...ready to watch and learn.
490
01:00:10,482 --> 01:00:13,474
[GRUNTING]
491
01:00:34,047 --> 01:00:37,039
But the salmon are a challenge...
492
01:00:37,300 --> 01:00:38,711
...even for bears.
493
01:00:39,427 --> 01:00:41,919
They are chum salmon,
up to three feet long...
494
01:00:42,180 --> 01:00:44,592
...and among the most aggressive
of their kind.
495
01:00:49,437 --> 01:00:50,802
Their hooked jaws and teeth...
496
01:00:51,064 --> 01:00:53,351
...are designed for fighting rivals.
497
01:01:00,073 --> 01:01:02,030
With fish of this size and ferocity...
498
01:01:02,909 --> 01:01:06,118
...it's best to let the bears
do the hard work.
499
01:01:12,627 --> 01:01:14,618
[BEAR GRUNTS]
500
01:01:25,348 --> 01:01:27,339
[BEAR GRUNTS]
501
01:01:33,648 --> 01:01:36,231
The eagle must sneak closer
to the action...
502
01:01:36,484 --> 01:01:38,475
...for any chance of a meal.
503
01:02:06,181 --> 01:02:09,173
[BEAR GRUNTING]
504
01:02:17,943 --> 01:02:20,981
Stealing from the bears
would be asking for trouble.
505
01:02:21,238 --> 01:02:23,195
But with so much food around...
506
01:02:23,448 --> 01:02:25,735
...the bears can afford to be choosy...
507
01:02:25,992 --> 01:02:28,404
...taking a bite and moving on.
508
01:02:31,665 --> 01:02:33,326
At the peak of the salmon run...
509
01:02:33,583 --> 01:02:36,416
...catching fish is soon just a game.
510
01:02:38,255 --> 01:02:40,872
It's time for the eagle
to make his move.
511
01:02:49,724 --> 01:02:51,431
But he still must be cautious.
512
01:02:51,685 --> 01:02:55,303
Grizzlies are notoriously
bad-tempered.
513
01:03:01,611 --> 01:03:05,400
He must eat as quickly
as he can before the bears notice.
514
01:03:07,951 --> 01:03:10,409
It doesn't take them long.
515
01:03:10,662 --> 01:03:11,868
[GRUNTS]
516
01:03:18,586 --> 01:03:20,042
[SCREECHING]
517
01:03:20,297 --> 01:03:23,210
[GRUNTING]
518
01:03:23,466 --> 01:03:25,924
[SCREECHING]
519
01:03:29,514 --> 01:03:32,381
[SCREECHING]
520
01:03:32,642 --> 01:03:35,805
He'll eat his fill here,
playing dare with the bears...
521
01:03:36,062 --> 01:03:38,929
...before heading south
as the fall takes hold.
522
01:03:45,864 --> 01:03:48,606
[HONKING]
523
01:03:48,867 --> 01:03:51,199
In Europe, autumn triggers...
524
01:03:51,453 --> 01:03:54,411
...a similar mass movement of birds.
525
01:03:54,664 --> 01:03:58,453
Brent geese, having left
their breeding sites in the Arctic...
526
01:03:58,710 --> 01:04:01,498
...head south to warmer climes.
527
01:04:01,755 --> 01:04:04,042
The birds fly with an extended family...
528
01:04:04,299 --> 01:04:06,791
...of aunts, uncles, and other relatives.
529
01:04:15,352 --> 01:04:18,344
[THUNDER RUMBLING]
530
01:04:21,274 --> 01:04:22,856
By sharing the decision-making...
531
01:04:23,109 --> 01:04:24,645
...they make better choices...
532
01:04:24,903 --> 01:04:26,769
...such as how to avoid
gathering storms.
533
01:04:31,368 --> 01:04:35,362
[THUNDER RUMBLING]
534
01:04:42,962 --> 01:04:44,953
[HONKING]
535
01:05:08,154 --> 01:05:11,897
Having flown over 2000 miles
from Arctic Russia...
536
01:05:12,158 --> 01:05:15,651
...this family's travels are nearly over.
537
01:05:18,581 --> 01:05:22,119
The coastal marshes around
Mont Saint-Michel in northern France...
538
01:05:22,377 --> 01:05:24,914
...are where they will make their home.
539
01:05:27,924 --> 01:05:31,918
[HONKING]
540
01:05:49,863 --> 01:05:51,353
[BELLS TOLLING]
541
01:05:51,614 --> 01:05:53,730
They will stay throughout the winter...
542
01:05:53,992 --> 01:05:57,201
...only returning to the Arctic in the spring.
543
01:06:01,458 --> 01:06:03,449
Some overwintering birds...
544
01:06:03,710 --> 01:06:06,668
...have more metropolitan tastes.
545
01:06:11,134 --> 01:06:12,499
As winter beckons...
546
01:06:12,760 --> 01:06:15,627
...ten million starlings
from Northern Europe...
547
01:06:15,889 --> 01:06:17,846
...converge on a few favorite spots...
548
01:06:18,099 --> 01:06:20,557
...in the center of Rome.
549
01:06:23,771 --> 01:06:27,059
Here they find warmth,
and relatively few predators.
550
01:06:36,618 --> 01:06:38,200
Their evening murmurations. ..
551
01:06:38,453 --> 01:06:41,787
...create nature's greatest aerial display.
552
01:08:04,539 --> 01:08:05,529
A favorite roost...
553
01:08:05,790 --> 01:08:08,703
...is an ancient cemetery
in the heart of the city.
554
01:08:08,960 --> 01:08:10,450
Two million converge...
555
01:08:10,712 --> 01:08:13,374
...on this one prime location alone.
556
01:08:29,522 --> 01:08:33,356
But such an astonishing gathering
can hardly be ignored.
557
01:08:35,570 --> 01:08:37,356
The peregrine falcon...
558
01:08:37,614 --> 01:08:40,356
...looking for his evening meal.
559
01:08:48,499 --> 01:08:50,661
It won't be easy.
560
01:08:52,295 --> 01:08:55,504
He's hunting the world's best
aerial flying team.
561
01:09:09,604 --> 01:09:12,141
Their rapid movements
and mesmeric waves...
562
01:09:12,398 --> 01:09:14,230
...confuse the peregrine...
563
01:09:14,484 --> 01:09:17,772
...stopping him locking on
to a single target.
564
01:09:23,201 --> 01:09:25,488
To achieve such defensive synchrony...
565
01:09:25,745 --> 01:09:27,452
...each starling flies in formation...
566
01:09:27,705 --> 01:09:30,117
...with seven of his nearest neighbors.
567
01:09:38,716 --> 01:09:40,172
They move as one...
568
01:09:40,426 --> 01:09:42,963
...with reflexes 10 times faster...
569
01:09:43,221 --> 01:09:45,462
...than any human fighter pilot.
570
01:10:02,740 --> 01:10:05,152
Despite the peregrine's best efforts...
571
01:10:05,410 --> 01:10:09,369
...he has been outmaneuvered
and outperformed.
572
01:10:11,290 --> 01:10:12,576
The tables turn.
573
01:10:12,834 --> 01:10:16,668
A squadron of several thousand birds
chase the peregrine away.
574
01:10:24,721 --> 01:10:27,884
The starlings can finally
come home to roost.
575
01:11:15,563 --> 01:11:17,270
Elsewhere in Italy...
576
01:11:17,523 --> 01:11:20,015
...the southerly migration
of common cranes...
577
01:11:20,276 --> 01:11:22,608
...have taken some over Venice.
578
01:11:29,410 --> 01:11:32,243
Different families take different routes.
579
01:11:32,497 --> 01:11:35,455
Each follows the path taken
by their parents before them.
580
01:11:59,190 --> 01:12:01,557
Venice was once an area of marshland...
581
01:12:01,818 --> 01:12:05,482
...where migrating cranes
could rest and feed.
582
01:12:05,738 --> 01:12:06,648
The passage of time...
583
01:12:06,906 --> 01:12:08,271
...has seen many changes...
584
01:12:08,533 --> 01:12:12,071
...but still these traditional routes endure.
585
01:12:18,793 --> 01:12:20,784
[HONKING]
586
01:12:36,435 --> 01:12:38,426
[HONKS]
587
01:12:44,944 --> 01:12:46,935
[HONKS]
588
01:12:55,872 --> 01:12:57,863
[HONKS]
589
01:13:00,459 --> 01:13:04,293
Soon, they will take their new family
across the Mediterranean...
590
01:13:04,547 --> 01:13:08,290
...to spend the winter
in the welcoming warmth of North Africa.
591
01:13:13,806 --> 01:13:16,798
Back in North America,
snow geese...
592
01:13:17,059 --> 01:13:18,925
...have also felt
the cold winds blowing...
593
01:13:19,186 --> 01:13:20,768
...and start to head south.
594
01:13:26,068 --> 01:13:27,604
Those taking the eastern route...
595
01:13:27,862 --> 01:13:30,399
...pass through another
of the world's great cities.
596
01:13:32,283 --> 01:13:34,274
[HONKING]
597
01:13:55,431 --> 01:13:58,549
Despite New York's immense
human population...
598
01:13:58,809 --> 01:14:02,302
...the city is a busy crossroads
for traveling birds.
599
01:14:02,980 --> 01:14:05,267
Over 250 different species...
600
01:14:05,524 --> 01:14:06,855
...migrate through each year.
601
01:14:39,058 --> 01:14:41,550
Like the rock formations
of Monument Valley...
602
01:14:41,811 --> 01:14:44,098
...the buildings create uplifts of air...
603
01:14:44,355 --> 01:14:46,471
...helping speed their journey.
604
01:14:57,910 --> 01:15:01,904
[AIR WHISTLING]
605
01:15:08,129 --> 01:15:10,496
[HONKING]
606
01:15:11,757 --> 01:15:13,873
Birds are ever adaptable.
607
01:15:14,135 --> 01:15:16,718
By passing on new knowledge
to their families...
608
01:15:16,971 --> 01:15:20,384
...they have learned to survive
in a world transformed by human hand.
609
01:15:51,047 --> 01:15:53,630
The geese leave New York behind.
610
01:15:53,883 --> 01:15:54,497
[CAR HORN HONKS]
611
01:15:54,759 --> 01:15:58,297
The welcoming warmth
of the Deep South beckons.
612
01:16:14,653 --> 01:16:16,439
As the year draws to an end...
613
01:16:16,697 --> 01:16:19,109
...all the birds stop traveling.
614
01:16:19,366 --> 01:16:21,573
Japanese cranes celebrate the change...
615
01:16:21,827 --> 01:16:24,694
...as they gather in the marshes
of Hokkaido in Japan.
616
01:16:32,254 --> 01:16:36,248
[SQUAWKING]
617
01:17:06,664 --> 01:17:08,951
Their population was once reduced...
618
01:17:09,208 --> 01:17:10,790
...to just 25 birds.
619
01:17:11,043 --> 01:17:14,161
Now, they number well over a thousand.
620
01:17:17,800 --> 01:17:20,292
Gifts of fish left out by local people...
621
01:17:20,553 --> 01:17:22,885
...have helped them thrive once more.
622
01:17:27,476 --> 01:17:30,468
But it's not all Zen serenity.
623
01:17:41,240 --> 01:17:42,230
In winter...
624
01:17:42,491 --> 01:17:45,654
“white-tailed eagles
gather here too.
625
01:17:45,911 --> 01:17:48,243
They are notorious bird hunters.
626
01:17:49,415 --> 01:17:53,409
[SQUAWKING]
627
01:17:57,882 --> 01:18:00,169
[SQUAWKING]
628
01:18:00,426 --> 01:18:04,420
Faced with the danger,
the cranes fearlessly fight back.
629
01:18:14,523 --> 01:18:18,517
[SQUAWKING]
630
01:18:30,497 --> 01:18:32,408
They offer quite a challenge.
631
01:18:32,666 --> 01:18:34,452
They are the largest cranes
in the world.
632
01:18:43,385 --> 01:18:45,672
[SQUAWKING]
633
01:18:49,308 --> 01:18:51,675
For the eagles,
there is a far easier meal:
634
01:18:58,651 --> 01:18:59,311
The food...
635
01:18:59,568 --> 01:19:02,026
...given to the cranes.
636
01:19:26,595 --> 01:19:27,335
The eagles leave...
637
01:19:29,473 --> 01:19:32,591
...and tranquility returns once more.
638
01:20:30,701 --> 01:20:33,659
To the Japanese,
the cranes' courtship dance...
639
01:20:33,912 --> 01:20:36,279
...is a symbol of peace, harmony...
640
01:20:36,540 --> 01:20:38,156
...and long life.
641
01:20:42,338 --> 01:20:45,251
The birds can live for over 60 years...
642
01:20:45,507 --> 01:20:47,123
...making their faithful partnerships...
643
01:20:47,384 --> 01:20:49,796
...among the most enduring of any bird.
644
01:20:53,390 --> 01:20:55,802
The relationships that birds have
with each other...
645
01:20:56,060 --> 01:20:57,300
...and with other animals...
646
01:20:57,561 --> 01:21:00,144
...allows them to thrive
in every comer of the globe.
647
01:21:03,150 --> 01:21:07,144
Their flights to find food,
make homes, and rear young...
648
01:21:07,404 --> 01:21:08,314
...embrace countries...
649
01:21:08,572 --> 01:21:10,529
...and continents.
650
01:21:15,746 --> 01:21:18,158
As they teach their offspring
the skills of survival...
651
01:21:19,500 --> 01:21:21,332
...they connect life on earth...
652
01:21:21,585 --> 01:21:23,451
...in ways we are only just beginning...
653
01:21:23,712 --> 01:21:25,328
...to fathom.
654
01:21:30,803 --> 01:21:34,512
For a brief moment, these cranes
may have stopped traveling.
655
01:21:35,557 --> 01:21:38,800
But across the planet
and throughout the seasons...
656
01:21:39,061 --> 01:21:40,597
...the journeys of birds...
657
01:21:41,146 --> 01:21:43,387
...unite the world.
658
01:21:58,455 --> 01:21:59,445
To capture...
659
01:21:59,706 --> 01:22:01,868
...a bird's-eye view,
the team employed the latest...
660
01:22:02,126 --> 01:22:04,242
...state-of-the-art techniques.
661
01:22:07,214 --> 01:22:08,204
On the way...
662
01:22:08,465 --> 01:22:11,924
...they witnessed behavior
that had never been seen before...
663
01:22:13,512 --> 01:22:15,002
...and looked anew at some...
664
01:22:15,264 --> 01:22:15,844
...of the greatest...
665
01:22:16,098 --> 01:22:17,714
...wildlife events on Earth.
666
01:22:22,271 --> 01:22:23,227
Wherever they took us...
667
01:22:23,480 --> 01:22:26,472
...they showed us the world with fresh eyes.
668
01:22:29,445 --> 01:22:30,185
With their help...
669
01:22:31,155 --> 01:22:33,066
...we flew on wings...
670
01:22:33,323 --> 01:22:35,690
...across the world.
671
01:22:39,663 --> 01:22:40,698
[MAN SPEAKING INDISTINCTLY]
672
01:22:40,956 --> 01:22:41,866
[BICYCLE HORN HONKING]
673
01:22:51,383 --> 01:22:53,841
[CHIRPING]
674
01:23:07,691 --> 01:23:09,307
[MOTOR WHIRRING]
675
01:23:40,349 --> 01:23:42,932
[MOTOR WHIRRING]
676
01:24:39,533 --> 01:24:41,524
[English - US - SDH]
54994
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