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The graylag goose flies 1800 miles...
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...from south-western Europe
to Scandinavia.
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The story of migrating birds
is the story of a promise:
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The promise to return.
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They fly, often thousands
of miles, beset with danger...
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...for a single reason:
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To survive.
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Their migration is a fight for life.
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00:06:33,810 --> 00:06:37,646
When spring comes,
they take wing for the Arctic.
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Some fly relentlessly, night and day.
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Others make the trip in stages...
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...laboring to reach
their distant destination.
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The Eurasian crane flies 2500 miles
from Spain to the boreal forest.
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00:09:42,040 --> 00:09:47,002
The white stork flies 3100 miles
from central Africa to western Europe.
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00:10:30,755 --> 00:10:33,048
To navigate across the latitudes...
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...they use the natural beacons
of the universe:
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The sun, the stars.
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They can track
the earth's magnetic field...
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...as sensitively
as a compass needle.
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00:11:39,532 --> 00:11:46,288
The barnacle goose flies 1500 miles
from western Europe to Greenland.
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00:13:01,030 --> 00:13:03,615
The whooper swan flies 1800 miles...
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...from the Far East
to the Siberian tundra.
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00:13:10,874 --> 00:13:13,500
All over the Northern Hemisphere...
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00:13:13,668 --> 00:13:18,464
...on every continent
the spring migration has begun.
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No barriers stop them.
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The birds make straight
for the far north.
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00:14:59,607 --> 00:15:06,822
The bar-headed goose flies 1500 miles
from India to the central Asia steppes.
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00:18:58,596 --> 00:18:58,637
The red-crowned crane flies 600 miles
from the Far East to the Siberian taiga.
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The red-crowned crane flies 600 miles
from the Far East to the Siberian taiga.
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00:20:27,101 --> 00:20:33,315
The bald eagle flies 1800 miles
from the American West to Alaska.
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The Canada goose flies 2000 miles...
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...from the Gulf of Mexico
to the Arctic Circle.
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00:23:33,245 --> 00:23:35,330
All across America...
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...from coast to coast...
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...the migrants wing their way
towards the Arctic Circle.
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The snow goose flies 2500 miles from
the Gulf of Mexico to the Arctic lands.
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The Clark's grebe in Oregon.
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The sandhill crane flies 2000 miles...
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...from the central American plains
to the Arctic lands.
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The greater sage grouse in Idaho.
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Coming from every continent...
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...the migrant birds converge
upon the Arctic and disperse.
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Their life as a community is over.
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Now, it's family time.
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There is a world apart:
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The realm of sea birds.
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00:38:15,669 --> 00:38:18,003
Every spring,
they quit the ocean waves...
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00:38:18,213 --> 00:38:21,590
...and flock to nest
on the same cliffs and rocks.
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00:38:33,728 --> 00:38:39,149
The common murre
are scattered over the North Atlantic.
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00:39:44,799 --> 00:39:48,135
The northern gannet
in the North Atlantic.
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00:41:30,572 --> 00:41:32,781
The Arctic summer is short-lived.
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Soon the northern lands will be
locked in the cold of the polar night.
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It is time for the fall migration.
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No more food. Time to leave.
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00:41:54,429 --> 00:41:58,390
Flying south is now a matter
of life or death.
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00:42:06,191 --> 00:42:10,444
The Arctic tern flies 12,500 miles
from the Arctic to the Antarctic.
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00:46:17,692 --> 00:46:18,942
Out in the ocean...
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00:46:19,110 --> 00:46:23,321
...any floating refuge can save
the life of an exhausted bird.
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00:46:24,031 --> 00:46:28,285
For the others, there's no rest
until the coast.
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00:48:24,026 --> 00:48:27,571
In the fall, there is
one prime necessity:
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Stay clear of bad weather.
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Traveling south
through North America.
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00:51:59,784 --> 00:52:06,873
The red-breasted goose traveling
south through eastern Europe.
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00:56:12,494 --> 00:56:15,955
The fall migration thins the ranks.
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00:56:16,415 --> 00:56:20,293
Among the survivors,
by flying with their elders...
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00:56:20,461 --> 00:56:23,796
...the youngsters memorize the route
and recognize the landmarks...
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00:56:23,964 --> 00:56:28,468
...they will fly over twice a year,
throughout their lives.
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Traveling into Africa.
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01:04:06,468 --> 01:04:08,677
For millions of birds from Europe...
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01:04:08,845 --> 01:04:11,472
...the journey's end is Africa...
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...but many will fall by the wayside.
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01:04:19,981 --> 01:04:26,737
The waders fly 6200 miles from the
Arctic Circle to the west coast of Africa.
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01:06:46,419 --> 01:06:48,712
At the end of their odyssey...
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...birds from all over
reach the heavenly tropics.
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The African white pelican
crossing Africa.
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Heaven is ephemeral.
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It will only last a season.
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01:12:00,650 --> 01:12:01,775
Once again...
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01:12:01,943 --> 01:12:06,238
...they must take to the skies
in their endless search for food.
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01:12:24,048 --> 01:12:27,259
The Amazon.
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01:15:20,099 --> 01:15:26,813
The albatross around Antarctica.
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01:15:29,859 --> 01:15:34,529
No landmass slows the swell
of the southern oceans.
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01:15:34,739 --> 01:15:38,491
Sea birds nest
on wind-lashed islands.
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01:15:40,119 --> 01:15:42,495
The young albatross
only comes to land...
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01:15:42,663 --> 01:15:47,125
...after circling the Antarctic
for several years.
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The rockhopper penguin
travels 620 miles...
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...following South Atlantic currents.
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01:18:31,582 --> 01:18:34,125
The king penguin travels...
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...from the southern continents
to the Antarctic islands.
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A year has passed.
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01:23:52,111 --> 01:23:55,947
Millions of birds have flown
thousands of miles.
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01:23:56,115 --> 01:23:59,784
In the sky, the same journeys
start over again.
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01:24:47,332 --> 01:24:49,333
In the Northern Hemisphere...
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01:24:49,501 --> 01:24:52,670
...migrating birds herald
a new spring.
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01:24:52,838 --> 01:24:55,838
The promise to return
has been fulfilled.
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