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The animal world is full
of spectacle and wonder.
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00:00:07,300 --> 00:00:10,140
But what's it like to be right
in the heart of the action?
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00:00:12,060 --> 00:00:16,140
To find out, our team of spy
creatures goes undercover.
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00:00:18,460 --> 00:00:22,740
They not only look like
the animals they film -
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they behave like them, too.
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00:00:30,020 --> 00:00:32,780
Armed with the latest
camera technology...
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..they are heading across the globe.
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00:00:43,620 --> 00:00:45,740
From the heat of the tropics...
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00:00:48,860 --> 00:00:51,300
..to the lands that lie
in the north.
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00:00:54,500 --> 00:00:57,180
From the islands
of the southern seas...
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00:01:00,500 --> 00:01:03,260
..to the snow and ice
of the frozen poles...
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00:01:05,980 --> 00:01:09,300
..our spies reveal
the astonishing variety of life
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00:01:09,300 --> 00:01:12,060
that thrives there
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00:01:12,060 --> 00:01:13,740
from inside their world.
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00:01:22,460 --> 00:01:24,860
On this assignment,
our spy creatures
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explore life in the temperate zone -
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00:01:27,700 --> 00:01:29,740
the lands that lie
between the tropics
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00:01:29,740 --> 00:01:31,340
and the Arctic Circle.
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00:01:36,660 --> 00:01:38,300
In this northern realm,
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00:01:38,300 --> 00:01:40,900
animals find
extraordinary ways to cope
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00:01:40,900 --> 00:01:42,580
with the changing seasons
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00:01:42,580 --> 00:01:45,620
and the surprising
opportunities they bring.
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00:01:47,460 --> 00:01:50,700
In the mountains of Japan,
winters can be harsh
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00:01:50,700 --> 00:01:53,300
and temperatures can fall
far below zero.
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00:01:58,220 --> 00:01:59,700
The Japanese macaque
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00:01:59,700 --> 00:02:03,020
is the only monkey that can
survive this far north.
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00:02:06,460 --> 00:02:10,580
Here, volcanic springs
bring comforting warmth.
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00:02:10,580 --> 00:02:11,980
A mountain spa.
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00:02:14,460 --> 00:02:16,660
The perfect spot to luxuriate.
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00:02:20,540 --> 00:02:23,420
A new member has just joined
their health club.
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00:02:24,820 --> 00:02:27,420
Spy Macaque is already
making friends.
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A youngster, just nine months old.
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The spa has another new recruit.
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One that can film the monkeys'
bathing rituals
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00:03:00,900 --> 00:03:03,980
both from above and below.
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00:03:07,460 --> 00:03:10,380
It's already capturing
unique behaviour.
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00:03:11,700 --> 00:03:14,380
As a mother grooms her baby,
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she lets warm water penetrate
deep into its fur.
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00:03:23,700 --> 00:03:25,220
The hot tub is a place
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00:03:25,220 --> 00:03:28,060
to socialise and strengthen
friendships.
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00:03:31,260 --> 00:03:33,060
It's a shared activity.
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You scratch my back,
I'll scratch yours.
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00:03:38,940 --> 00:03:41,180
The troupe has a clear hierarchy.
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Who grooms who helps keep
everyone in their place.
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00:03:50,100 --> 00:03:52,100
It's also a chance to relax.
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00:04:00,100 --> 00:04:02,820
Nearby, winter sports are on offer.
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The young males love play fighting.
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00:04:08,380 --> 00:04:10,580
MACAQUES SCREECH
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One day they'll leave
the troupe to join another.
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00:04:15,060 --> 00:04:18,100
Testing their strength helps
prepare them for that moment.
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Today, they have a chance
to play with a snowball.
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One that can film.
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00:04:46,380 --> 00:04:50,420
Rather than play, he admires
his reflection in its lens.
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00:04:54,500 --> 00:04:56,700
Nearby, games are almost over.
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00:05:05,300 --> 00:05:10,540
In the spa, Spy Monkey
is still making friends,
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00:05:10,540 --> 00:05:12,580
including the curious baby.
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00:05:26,020 --> 00:05:28,220
But when social position
is everything,
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you can't always choose
who your friends are.
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It's Mum who decides.
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00:05:40,780 --> 00:05:42,900
The spa not only gives warmth,
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it gives therapy,
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helping them de-stress.
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It's used most by the females,
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especially those who are pregnant.
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As females never leave the troupe,
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they pass the custom down
through the generations.
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00:06:05,660 --> 00:06:09,060
The troupe's young males
will soon be gone.
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00:06:09,060 --> 00:06:12,500
For now, a favourite pastime
is disturbing the peace.
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The baby isn't so quick
off the mark.
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And Mum is nowhere to be seen.
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00:06:45,620 --> 00:06:48,140
But what mother would ever
really leave her baby?
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00:06:58,860 --> 00:07:02,060
Now, a special kind of warmth.
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One only a mother can offer.
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00:07:12,020 --> 00:07:14,420
But there goes her chance to relax.
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00:07:20,140 --> 00:07:22,540
While it's still winter in Japan,
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00:07:22,540 --> 00:07:25,020
the mountains of northwest Mexico
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00:07:25,020 --> 00:07:27,780
are having their first taste
of spring.
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00:07:29,060 --> 00:07:30,780
It's the setting for perhaps
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00:07:30,780 --> 00:07:33,340
the most beautiful wildlife
spectacle of all.
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00:07:34,500 --> 00:07:37,380
One that requires
a unique spy creature.
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00:07:38,460 --> 00:07:42,700
The blue-throated hummingbird
is native to these forests.
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00:07:42,700 --> 00:07:45,980
This spy version hovers
just like the real thing.
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00:07:47,780 --> 00:07:50,420
In the heart of this grove,
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00:07:50,420 --> 00:07:53,820
half a billion monarch
butterflies lie sleeping.
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00:07:59,380 --> 00:08:01,380
They have travelled
from as far as Canada
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to escape the cold northern winter.
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00:08:06,500 --> 00:08:10,820
How they return to this
exact spot is a mystery.
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00:08:10,820 --> 00:08:14,500
Like the butterflies,
hummingbirds feed on nectar.
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00:08:14,500 --> 00:08:16,500
So our spy isn't seen as a threat.
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00:08:18,100 --> 00:08:19,860
While resting,
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00:08:19,860 --> 00:08:21,780
they cluster together
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00:08:21,780 --> 00:08:24,340
to conserve precious warmth.
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00:08:24,340 --> 00:08:25,860
But as winter ends,
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00:08:25,860 --> 00:08:28,180
the sun warms their fragile wings.
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00:08:32,460 --> 00:08:36,500
Once they reach a critical
13 degrees Celsius,
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they start to fly.
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00:08:43,900 --> 00:08:45,860
As the day warms,
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the forest comes to life.
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Spy Hummingbird won't harm
these delicate butterflies.
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00:09:00,100 --> 00:09:03,740
Its moving parts are shielded
to keep them safe.
101
00:09:04,780 --> 00:09:07,180
Butterflies can even
safely land on its wings.
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It soon captures something
quite extraordinary.
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00:09:32,620 --> 00:09:35,900
What starts as a trickle
soon becomes a stream.
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00:09:43,340 --> 00:09:45,780
Then grows into a cascade.
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00:09:53,740 --> 00:09:56,540
A spectacle that has rarely
been filmed.
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00:10:00,500 --> 00:10:04,060
And our spy is harmlessly
in the very heart of it.
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00:10:21,140 --> 00:10:24,260
Beauty also lies in the detail.
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00:11:06,980 --> 00:11:09,860
After five months spent hibernating,
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each monarch must take a drink.
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00:11:15,180 --> 00:11:18,620
It will convert their fat stores
to vital sugars.
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00:11:21,100 --> 00:11:23,380
Fuel for the long journey
that lies ahead.
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00:11:37,980 --> 00:11:41,100
Re-energized, they begin
their migration
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00:11:41,100 --> 00:11:42,740
back to North America.
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00:11:54,500 --> 00:11:58,420
The journey will involve three
successive generations,
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00:11:58,420 --> 00:12:01,060
each completing a new stage
of the journey.
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00:12:04,140 --> 00:12:06,940
Only the last will return
in the autumn.
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00:12:10,260 --> 00:12:13,220
It's a relay race across
the generations
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00:12:13,220 --> 00:12:15,380
of up to 6,000 miles.
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00:12:18,980 --> 00:12:22,980
How they return to this exact same
grove remains a mystery.
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00:12:33,780 --> 00:12:37,060
In Alaska, at the other end
of North America,
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spring is only just starting
to arrive.
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Here, bald eagles rule the skies.
123
00:12:53,460 --> 00:12:56,140
Including, for now, a spy.
124
00:13:01,020 --> 00:13:04,060
At this time of year,
the glaciers are volatile,
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00:13:04,060 --> 00:13:06,660
bringing danger
to the life that thrives here.
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00:13:09,380 --> 00:13:11,780
As the sun rises higher each day,
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00:13:11,780 --> 00:13:13,580
the spring melt begins.
128
00:13:17,060 --> 00:13:19,780
Already, cracks have started
to form.
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00:13:23,780 --> 00:13:26,060
Soon the sea ice will be gone.
130
00:13:32,900 --> 00:13:37,540
The resident harbour seals now haul
out on ice cast from a glacier.
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00:13:44,260 --> 00:13:47,700
With spring, humpback whales
also start to arrive.
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00:13:54,620 --> 00:13:56,860
They migrated north from California
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00:13:56,860 --> 00:13:59,860
to enjoy the feeding opportunities
now found here.
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00:14:07,340 --> 00:14:11,300
Sea otters gather in huge rafts -
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00:14:11,300 --> 00:14:13,300
up to 2,000 in all.
136
00:14:25,100 --> 00:14:28,700
The nursing mothers congregate
in the areas now free of ice.
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00:14:39,020 --> 00:14:42,140
Spy Sea Otter joins them
in their floating nursery.
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She's immediately accepted
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00:14:49,660 --> 00:14:52,300
by these notoriously shy creatures.
140
00:14:55,300 --> 00:14:57,780
It's a privileged insider's view
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00:14:57,780 --> 00:15:00,220
of the most sociable otter of all.
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00:15:04,500 --> 00:15:06,780
Here, they not only have company -
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there are more eyes to spot danger.
144
00:15:11,540 --> 00:15:12,620
The spring melt
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00:15:12,620 --> 00:15:14,660
makes the glaciers unstable.
146
00:15:41,460 --> 00:15:43,900
The icefall creates a rolling wave
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00:15:43,900 --> 00:15:45,500
up to ten metres high.
148
00:15:48,380 --> 00:15:49,980
It may still be a danger
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over a kilometre away.
150
00:15:55,500 --> 00:15:56,700
In the turmoil,
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mothers and pups
are easily separated.
152
00:16:02,900 --> 00:16:05,260
They must find refuge away
from the glacier.
153
00:16:26,780 --> 00:16:28,380
In a cove, they find a solution
154
00:16:28,380 --> 00:16:30,140
to the turbulent waters.
155
00:16:32,860 --> 00:16:35,460
Kelp offers the moorings they need.
156
00:16:37,700 --> 00:16:39,140
It's just a matter
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00:16:39,140 --> 00:16:40,780
of how best to attach themselves.
158
00:16:49,180 --> 00:16:52,060
But even this beginner
is having success.
159
00:16:59,140 --> 00:17:00,700
As the ice vanishes,
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00:17:00,700 --> 00:17:02,500
more kelp beds will soon appear.
161
00:17:03,780 --> 00:17:05,220
The otters can enjoy
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00:17:05,220 --> 00:17:07,500
the upcoming summer in peace.
163
00:17:17,380 --> 00:17:19,980
Spring has also reached Manitoba
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in central Canada.
165
00:17:23,420 --> 00:17:24,820
It marks the beginning
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00:17:24,820 --> 00:17:26,460
of an extraordinary awakening.
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00:17:31,260 --> 00:17:33,140
These are garter snakes.
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00:17:40,260 --> 00:17:42,700
After hibernating together
underground,
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they emerge in their thousands.
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Remarkably, all are male.
171
00:17:56,780 --> 00:17:58,980
They warm themselves in the sun,
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preparing for the moment
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00:18:00,860 --> 00:18:02,940
when the females emerge.
174
00:18:06,500 --> 00:18:08,300
This one has a camera.
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00:18:12,300 --> 00:18:16,260
Our spy is entering a world
governed by smell.
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00:18:16,260 --> 00:18:19,700
Snakes use their tongues
to pick up scent.
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00:18:19,700 --> 00:18:21,820
All are searching for females.
178
00:18:27,020 --> 00:18:29,660
When the males detect
a likely partner,
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00:18:29,660 --> 00:18:31,260
they swarm all over her,
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00:18:31,260 --> 00:18:33,700
desperate to be the first to mate.
181
00:18:36,540 --> 00:18:38,620
But Spy Snake is witnessing
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00:18:38,620 --> 00:18:41,300
something quite extraordinary.
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Although there are no females here,
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the males are still swarming.
185
00:18:52,540 --> 00:18:54,620
And even more are joining the scrum.
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00:19:03,980 --> 00:19:05,460
Nearby, others have also
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picked up the scent.
188
00:19:10,300 --> 00:19:12,500
Soon, there's no stopping them.
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00:19:32,180 --> 00:19:34,060
As everyone piles in, Spy Snake
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00:19:34,060 --> 00:19:37,060
becomes buried in
the growing ball of snakes.
191
00:19:55,380 --> 00:19:57,380
Then, in the middle,
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the reason for the knot of serpents.
193
00:20:05,500 --> 00:20:06,780
An impostor -
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a male that smells like a female.
195
00:20:09,980 --> 00:20:13,340
He's deliberately
attracting the males.
196
00:20:17,460 --> 00:20:20,940
His aim is to share their warmth.
197
00:20:20,940 --> 00:20:23,340
By fooling them into embracing him,
198
00:20:23,340 --> 00:20:25,100
he becomes superheated -
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00:20:25,100 --> 00:20:27,660
a huge gain for
a cold-blooded reptile
200
00:20:27,660 --> 00:20:29,260
looking for a mate.
201
00:20:31,460 --> 00:20:34,180
Finally, there she is.
202
00:20:38,020 --> 00:20:39,300
Her perfume is far stronger
203
00:20:39,300 --> 00:20:40,620
than the impostor.
204
00:20:44,100 --> 00:20:45,940
Nothing beats the real thing.
205
00:20:49,220 --> 00:20:51,460
The warmest males are
already hot on her trail.
206
00:20:54,060 --> 00:20:57,500
But the superheated impostor
leads the charge.
207
00:21:11,220 --> 00:21:14,380
Here, snakes that
impersonate females
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00:21:14,380 --> 00:21:15,980
get ahead in the mating game.
209
00:21:19,700 --> 00:21:21,460
Best leave them to it.
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00:21:28,780 --> 00:21:30,180
Summer has arrived
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in the forests of southern Germany.
212
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The season of plenty
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00:21:38,700 --> 00:21:41,780
for a secretive
and industrious creature.
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00:21:46,100 --> 00:21:48,300
The only clue to its presence -
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00:21:48,300 --> 00:21:50,340
a carefully constructed woodpile.
216
00:21:55,140 --> 00:21:56,220
This is the time
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00:21:56,220 --> 00:21:57,860
beavers raise their young.
218
00:21:59,420 --> 00:22:02,300
Making the most of the lush
vegetation that summer brings.
219
00:22:04,140 --> 00:22:06,980
They recognise each other by smell.
220
00:22:06,980 --> 00:22:09,820
Rubbing noses
confirms their friendship.
221
00:22:14,100 --> 00:22:15,340
They pair for life
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00:22:15,340 --> 00:22:17,500
and live together as a family.
223
00:22:24,260 --> 00:22:26,300
They are wary of strangers.
224
00:22:28,060 --> 00:22:30,540
Newcomers enter at their own risk.
225
00:22:31,820 --> 00:22:34,420
Somehow, Spy Beaver
must win them over.
226
00:22:36,260 --> 00:22:39,020
But first, he must pass
the odour test.
227
00:22:43,420 --> 00:22:45,580
Real beavers have scent glands
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00:22:45,580 --> 00:22:47,500
that tell family from foe.
229
00:22:50,100 --> 00:22:52,500
As our spy doesn't smell
like a beaver,
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00:22:52,500 --> 00:22:54,140
he's free to explore.
231
00:22:57,940 --> 00:23:00,540
Their lodge has
a concealed entrance...
232
00:23:02,060 --> 00:23:04,260
..that lets them come and go
233
00:23:04,260 --> 00:23:05,860
without being seen.
234
00:23:08,940 --> 00:23:11,180
Keeping a low profile hides them
235
00:23:11,180 --> 00:23:13,140
from predators like lynx and foxes.
236
00:23:18,380 --> 00:23:19,940
On the bank, a new spy
237
00:23:19,940 --> 00:23:21,580
is there to greet her.
238
00:23:25,620 --> 00:23:28,060
Beavers are strict vegetarians
239
00:23:28,060 --> 00:23:29,620
and Spy Baby Beaver
240
00:23:29,620 --> 00:23:31,700
is surrounded by willow -
241
00:23:31,700 --> 00:23:33,100
their favourite meal.
242
00:23:46,100 --> 00:23:48,180
Her teeth are coloured orange
243
00:23:48,180 --> 00:23:50,180
by iron deposits
that strengthen them.
244
00:23:58,300 --> 00:24:00,340
They are also self-sharpening
245
00:24:00,340 --> 00:24:02,380
and slice through wood like a knife.
246
00:24:10,140 --> 00:24:14,140
Beavers can fell 300 shrubs
and trees each year,
247
00:24:14,140 --> 00:24:16,380
clearing old growth and helping
248
00:24:16,380 --> 00:24:18,260
to maintain their entire ecosystem.
249
00:24:22,260 --> 00:24:23,740
For now, the youngsters
250
00:24:23,740 --> 00:24:25,300
leave it all to the grown-ups.
251
00:24:28,220 --> 00:24:29,980
They spend most of
their time at play.
252
00:24:32,620 --> 00:24:35,260
Wrestling is a
rarely filmed pastime.
253
00:24:57,140 --> 00:24:59,020
Beavers also have friends.
254
00:25:04,700 --> 00:25:05,740
A muskrat.
255
00:25:12,340 --> 00:25:14,700
This mini-me lives
alongside the beavers,
256
00:25:14,700 --> 00:25:16,700
and even shares their lodge.
257
00:25:24,020 --> 00:25:26,060
Wherever the beaver goes,
258
00:25:26,060 --> 00:25:27,580
the muskrat follows.
259
00:25:32,660 --> 00:25:34,060
Being ten times smaller
260
00:25:34,060 --> 00:25:35,380
means the best food
261
00:25:35,380 --> 00:25:36,620
is usually out of reach.
262
00:25:37,900 --> 00:25:40,260
But while the beaver
does the hard work,
263
00:25:40,260 --> 00:25:42,100
the muskrat can sit back.
264
00:25:58,140 --> 00:26:00,340
This is what friends are for.
265
00:26:11,180 --> 00:26:12,580
Beavers with young
266
00:26:12,580 --> 00:26:14,420
are always on high alert.
267
00:26:37,180 --> 00:26:38,220
A false alarm.
268
00:26:41,220 --> 00:26:42,420
But always best to err
269
00:26:42,420 --> 00:26:43,700
on the side of caution.
270
00:26:49,820 --> 00:26:51,180
After a fright,
271
00:26:51,180 --> 00:26:52,780
grooming is a comfort for everyone.
272
00:27:00,060 --> 00:27:01,940
By creating a layer of air
273
00:27:01,940 --> 00:27:03,940
between skin and underfur,
274
00:27:03,940 --> 00:27:05,780
it provides insulation.
275
00:27:11,020 --> 00:27:12,860
Harmony is soon restored.
276
00:27:15,820 --> 00:27:16,940
While the muskrat
277
00:27:16,940 --> 00:27:18,300
just keeps himself busy.
278
00:27:25,340 --> 00:27:27,980
For Mum, a well-earned massage
279
00:27:27,980 --> 00:27:30,020
after a hard day's work.
280
00:27:40,220 --> 00:27:41,900
As early summer arrives,
281
00:27:41,900 --> 00:27:44,500
Baha, California becomes the focus
282
00:27:44,500 --> 00:27:46,420
of a great natural gathering.
283
00:27:48,100 --> 00:27:50,100
Here, brown pelicans patrol
284
00:27:50,100 --> 00:27:53,060
some of the richest
fishing grounds in the world.
285
00:28:01,460 --> 00:28:03,900
There's a new member of the flock.
286
00:28:03,900 --> 00:28:05,500
A spy on the wing.
287
00:28:08,940 --> 00:28:11,420
One that can film the fishing party
288
00:28:11,420 --> 00:28:12,940
wing tip to wing tip.
289
00:28:27,020 --> 00:28:28,460
Clear, warm currents
290
00:28:28,460 --> 00:28:30,300
create plankton blooms.
291
00:28:30,300 --> 00:28:32,100
Huge fish shoals are found.
292
00:28:36,660 --> 00:28:37,820
It's just a matter
293
00:28:37,820 --> 00:28:39,220
of spotting them from the air.
294
00:28:42,540 --> 00:28:44,700
Then taking them by surprise.
295
00:28:57,340 --> 00:28:59,380
But where fishing is easy,
296
00:28:59,380 --> 00:29:01,980
everyone wants a
piece of the action.
297
00:29:03,820 --> 00:29:05,020
Bottlenose dolphins.
298
00:29:09,820 --> 00:29:12,140
By spreading out, they increase
299
00:29:12,140 --> 00:29:13,740
their chances of finding a shoal.
300
00:29:16,620 --> 00:29:18,620
Dolphins are intensely curious.
301
00:29:21,900 --> 00:29:23,500
They leap to check out
302
00:29:23,500 --> 00:29:25,540
the strange bird
that's following them.
303
00:29:46,060 --> 00:29:47,500
Here, it's not just dolphins
304
00:29:47,500 --> 00:29:48,900
that take to the air.
305
00:29:52,980 --> 00:29:54,820
Mobula rays.
306
00:30:07,420 --> 00:30:09,260
Why they leap is a mystery.
307
00:30:14,460 --> 00:30:17,380
But it might be a signal to show
where food has been found.
308
00:30:36,660 --> 00:30:41,780
For where rays are jumping, huge
blooms of plankton are not far away.
309
00:30:46,460 --> 00:30:50,460
And rays converge in their
tens of thousands to feed.
310
00:31:14,020 --> 00:31:16,580
The aerial view may be astonishing,
311
00:31:16,580 --> 00:31:18,500
but more wonder lies below.
312
00:31:24,380 --> 00:31:28,020
Spy Ray gets closer
than any human diver can.
313
00:31:31,700 --> 00:31:33,500
Deep into the heart of the shoal.
314
00:31:50,740 --> 00:31:53,900
With a spy swimming among them
315
00:31:53,900 --> 00:31:56,100
and a spy in the sky,
316
00:31:56,100 --> 00:31:59,900
our cameras capture an event
never filmed before.
317
00:32:03,900 --> 00:32:06,620
As the rays circle,
they create a vortex,
318
00:32:06,620 --> 00:32:08,980
concentrating the plankton inside.
319
00:32:17,820 --> 00:32:21,060
At every turn, more plankton
is sucked into the centre.
320
00:32:22,260 --> 00:32:24,900
They just have to scoop it up.
321
00:32:32,860 --> 00:32:35,060
When they feed near the surface,
322
00:32:35,060 --> 00:32:37,140
they use a different technique.
323
00:32:37,140 --> 00:32:39,300
Ripples pass through the masses,
324
00:32:39,300 --> 00:32:41,540
like a subaquatic Mexican wave.
325
00:32:55,220 --> 00:32:57,380
Soon, the leaping starts again.
326
00:33:01,500 --> 00:33:06,340
For Spy Ray, it's a case of,
if you can't beat them, join them.
327
00:33:23,020 --> 00:33:27,300
As the day ends, our spy keeps
leaping with the best of them.
328
00:33:36,500 --> 00:33:38,220
GULLS CRY
329
00:33:40,260 --> 00:33:42,100
It's midsummer in Alaska.
330
00:33:43,540 --> 00:33:46,020
The fishing season
for grizzly bears.
331
00:33:48,180 --> 00:33:50,020
THEY GROWL PLAYFULLY
332
00:33:52,100 --> 00:33:53,900
With uncanny timing,
333
00:33:53,900 --> 00:33:57,980
mother bears bring their
cubs to a remarkable event.
334
00:33:59,780 --> 00:34:03,820
Soon, a million salmon will
pass up this river to spawn.
335
00:34:03,820 --> 00:34:06,740
BEAR HUFFS
336
00:34:06,740 --> 00:34:09,500
This year, a newcomer
is joining them.
337
00:34:16,100 --> 00:34:20,460
With his teddy-bear looks
and camera eye, he's well prepared.
338
00:34:24,140 --> 00:34:26,460
Late arrivals must be quick.
339
00:34:26,460 --> 00:34:29,020
The best fishing spots
will soon be taken.
340
00:34:30,580 --> 00:34:33,260
BEAR GRUNTS
341
00:34:33,260 --> 00:34:35,700
Our spy also has a quick way down.
342
00:34:42,820 --> 00:34:44,940
He's now in prime position.
343
00:34:49,380 --> 00:34:53,380
Risky, when a mother bear
is still staking out her claim.
344
00:34:56,380 --> 00:34:58,420
SHE SNORTS
345
00:35:04,140 --> 00:35:05,980
SHE SNIFFS
346
00:35:08,940 --> 00:35:11,340
But he seems to have got
away with it.
347
00:35:23,460 --> 00:35:25,340
For all, it's a waiting game.
348
00:35:27,460 --> 00:35:29,580
The tide is out,
and the river empty.
349
00:35:32,860 --> 00:35:36,060
But her cubs have yet to master
the art of patience.
350
00:35:38,100 --> 00:35:41,060
They head out to the estuary
to search for the salmon.
351
00:35:45,980 --> 00:35:48,420
Leaving mother bear
to bide her time.
352
00:35:54,780 --> 00:35:58,100
Spy Bald Eagle is already
on their trail.
353
00:36:00,060 --> 00:36:03,060
Bears can smell fish
up to 20 miles away.
354
00:36:07,940 --> 00:36:11,380
By following their nose, they soon
find where the salmon are gathering.
355
00:36:21,340 --> 00:36:23,100
With fish everywhere,
356
00:36:23,100 --> 00:36:25,820
just how hard can it be
to catch one?
357
00:37:07,860 --> 00:37:10,700
Finally, after all that effort.
358
00:37:18,020 --> 00:37:20,620
Older bears know better
than to waste their energy.
359
00:37:21,940 --> 00:37:24,460
They've learnt that salmon
arrive on the high tide.
360
00:37:27,020 --> 00:37:29,580
But the first is not what it seems.
361
00:37:31,780 --> 00:37:34,700
Spy Salmon swims just like
the real thing.
362
00:37:43,060 --> 00:37:46,780
It, too, is ready to run
the gauntlet of the bears.
363
00:37:49,940 --> 00:37:52,780
In its wake
are countless sockeye salmon.
364
00:37:58,260 --> 00:38:00,500
They've travelled thousands of miles
365
00:38:00,500 --> 00:38:04,100
to spawn in the river
where once they were born.
366
00:38:14,340 --> 00:38:17,380
The salmon bottleneck
beneath the falls,
367
00:38:17,380 --> 00:38:19,860
before taking a leap
into the unknown.
368
00:38:22,180 --> 00:38:24,260
A prime spot for fishing.
369
00:38:29,940 --> 00:38:32,580
Bears can see underwater.
370
00:38:32,580 --> 00:38:34,580
Useful for targeting.
371
00:38:53,140 --> 00:38:56,100
With so many fish,
it's like bobbing for apples.
372
00:39:06,900 --> 00:39:09,580
They can eat over 30 salmon a day,
373
00:39:09,580 --> 00:39:12,180
and almost double their weight
in the fishing season.
374
00:39:15,700 --> 00:39:18,860
They soon become fussy,
picking the most nutritious treats,
375
00:39:18,860 --> 00:39:20,900
like the skin and head.
376
00:39:24,700 --> 00:39:27,860
But any good party can attract
unwelcome guests.
377
00:39:33,700 --> 00:39:35,540
THEY GRUNT
378
00:39:39,020 --> 00:39:41,420
They have good reason
to feel nervous.
379
00:39:43,020 --> 00:39:45,140
Males can kill cubs.
380
00:39:53,180 --> 00:39:55,020
One mother makes a stand.
381
00:39:56,260 --> 00:39:58,100
SHE GROWLS FEROCIOUSLY
382
00:40:00,580 --> 00:40:02,220
She's joined by another.
383
00:40:04,780 --> 00:40:06,620
THEY GROWL
384
00:40:17,420 --> 00:40:22,060
He may be powerful, but he's no
match for a mother's fury.
385
00:40:45,220 --> 00:40:47,140
He won't be back in a hurry.
386
00:40:51,340 --> 00:40:53,620
Now that the cubs
have nothing to fear,
387
00:40:53,620 --> 00:40:55,700
why not tackle a bear of their own?
388
00:41:02,420 --> 00:41:04,220
Grab the paw first...
389
00:41:11,180 --> 00:41:12,900
That showed him.
390
00:41:14,860 --> 00:41:16,540
Now the killer bite.
391
00:41:21,780 --> 00:41:23,860
Maybe not.
392
00:41:25,220 --> 00:41:27,460
SPY BEAR GRUNTS
393
00:41:28,700 --> 00:41:31,740
Meanwhile, Spy Salmon
has been left high and dry.
394
00:41:33,940 --> 00:41:35,860
Surely a better bet.
395
00:41:48,340 --> 00:41:51,420
Never mind, there's always
one that gets away.
396
00:42:01,020 --> 00:42:04,260
As summer draws to an end,
Istanbul and Turkey
397
00:42:04,260 --> 00:42:07,260
sets the scene
for another great spectacle.
398
00:42:09,340 --> 00:42:13,180
White storks are heading south
to escape Europe's upcoming winter,
399
00:42:13,180 --> 00:42:14,980
when food will be hard to find.
400
00:42:16,780 --> 00:42:20,060
Half a million will make
the perilous journey to Africa
401
00:42:20,060 --> 00:42:22,300
of up to 8,000 miles.
402
00:42:28,380 --> 00:42:29,860
They have a fellow traveller.
403
00:42:33,340 --> 00:42:36,540
He joins them in the thermals
that rise from the ground below.
404
00:42:41,100 --> 00:42:45,580
Spy Stork's broad wings are designed
to ride these natural elevators,
405
00:42:45,580 --> 00:42:47,900
just like the real birds.
406
00:42:47,900 --> 00:42:49,940
WIND GUSTS
407
00:42:49,940 --> 00:42:52,380
The twisting columns of hot air
408
00:42:52,380 --> 00:42:54,780
offer the storks
a free ride upwards.
409
00:43:05,500 --> 00:43:07,300
WIND GUSTS
410
00:43:17,580 --> 00:43:19,780
Once they reach the top
of one thermal,
411
00:43:19,780 --> 00:43:22,020
they simply glide to another.
412
00:43:25,940 --> 00:43:28,940
They head to the city
with hardly a wing flap.
413
00:43:30,220 --> 00:43:32,700
Good move.
414
00:43:32,700 --> 00:43:35,860
The roads and buildings
of Istanbul reflect the heat,
415
00:43:35,860 --> 00:43:37,460
creating huge thermals
416
00:43:37,460 --> 00:43:38,860
which carry them upwards
417
00:43:38,860 --> 00:43:40,500
even higher than before.
418
00:44:02,700 --> 00:44:06,980
Riding only on hot air, they can
reach heights of nearly a mile.
419
00:44:12,860 --> 00:44:15,060
They need the altitude.
420
00:44:15,060 --> 00:44:18,020
They now face the riskiest part
of their journey.
421
00:44:18,020 --> 00:44:21,260
Because thermals
don't form over water.
422
00:44:35,860 --> 00:44:37,620
As they try to glide,
423
00:44:37,620 --> 00:44:39,900
there's nothing to give
them the lift they need.
424
00:44:45,180 --> 00:44:47,820
Those who hadn't gained
enough height on land
425
00:44:47,820 --> 00:44:49,180
soon drop from the sky.
426
00:44:57,220 --> 00:44:59,140
To avoid plunging into the sea,
427
00:44:59,140 --> 00:45:01,340
they must flap their heavy wings.
428
00:45:05,500 --> 00:45:07,060
They start burning body fat
429
00:45:07,060 --> 00:45:08,540
just to stay airborne.
430
00:45:08,540 --> 00:45:10,300
Consuming 20 times more energy
431
00:45:10,300 --> 00:45:11,580
than when they glide.
432
00:45:16,220 --> 00:45:20,020
If a wing so much as touches the
water, they will fall in and drown.
433
00:45:24,820 --> 00:45:26,660
They are battling for their lives.
434
00:45:37,300 --> 00:45:39,740
Then, suddenly, a lifeline.
435
00:45:41,940 --> 00:45:44,100
An outcrop rising from the sea.
436
00:45:56,380 --> 00:45:58,140
Just enough sun-baked rock
437
00:45:58,140 --> 00:46:01,260
to create the thermals
they so desperately need.
438
00:46:12,180 --> 00:46:15,580
It's a free ride upwards
that saves their lives.
439
00:46:20,220 --> 00:46:23,300
In this way, storks use
islands as stepping stones
440
00:46:23,300 --> 00:46:25,060
to help survive the crossing.
441
00:46:27,060 --> 00:46:28,940
Travelling only by day,
442
00:46:28,940 --> 00:46:32,140
it can take four weeks before they
arrive over the plains of Africa.
443
00:46:37,660 --> 00:46:39,380
BIRDSONG
444
00:46:46,980 --> 00:46:50,580
Here, they'll have all the insects
and other food they need
445
00:46:50,580 --> 00:46:53,660
as they wait out
Europe's upcoming winter.
446
00:46:53,660 --> 00:46:55,580
BIRDSONG
447
00:47:05,300 --> 00:47:08,260
In England, the early-morning mist
448
00:47:08,260 --> 00:47:11,140
signals that autumn
has finally arrived.
449
00:47:13,220 --> 00:47:17,860
And with it, the greatest and most
colourful transformation in nature.
450
00:47:33,900 --> 00:47:35,780
The trees survive the winter
451
00:47:35,780 --> 00:47:39,460
by taking back nutrients
and chlorophyll from the leaves.
452
00:47:48,100 --> 00:47:50,980
What's left behind
are the autumn hues.
453
00:47:53,900 --> 00:47:56,620
The leaves that once fed the trees
are then discarded.
454
00:48:01,180 --> 00:48:03,980
Grey squirrels are among
the many preparing themselves
455
00:48:03,980 --> 00:48:05,820
for the changing season.
456
00:48:08,780 --> 00:48:10,500
CROWS CAW
457
00:48:15,380 --> 00:48:19,180
Spy Squirrel is poised and ready
with his camera eye.
458
00:48:24,900 --> 00:48:26,300
Well, nearly ready.
459
00:48:28,820 --> 00:48:31,100
Along with his spy nut,
460
00:48:31,100 --> 00:48:33,100
other disguised cameras are strewn
461
00:48:33,100 --> 00:48:34,500
across the forest floor.
462
00:48:43,100 --> 00:48:46,500
In autumn, squirrels stock up
their winter larder.
463
00:48:49,180 --> 00:48:52,060
Each may bury around 10,000 nuts.
464
00:48:52,060 --> 00:48:54,420
In an amazing feat of memory,
465
00:48:54,420 --> 00:48:56,700
they may retrieve 4,000 of them.
466
00:48:58,420 --> 00:49:01,980
With so many nuts to find,
competition is rife.
467
00:49:01,980 --> 00:49:04,100
HIGH-PITCHED SHRIEKING
468
00:49:17,220 --> 00:49:19,940
Every nut is a gift
for would-be thieves.
469
00:49:20,780 --> 00:49:23,100
CROWS CAW
470
00:49:28,100 --> 00:49:31,540
In fact, around a fifth of all
squirrels steal from others.
471
00:49:33,940 --> 00:49:36,180
That'll do nicely.
472
00:49:50,780 --> 00:49:53,820
It's one thing to steal a nut -
473
00:49:53,820 --> 00:49:56,660
another to keep hold of it.
474
00:50:01,220 --> 00:50:04,020
It's not just squirrels
feeling the seasonal change.
475
00:50:05,460 --> 00:50:07,460
Autumn is the rutting season
for red deer.
476
00:50:09,580 --> 00:50:13,140
By breeding now, they will
have their young in the summer.
477
00:50:16,700 --> 00:50:18,420
Their stag.
478
00:50:18,420 --> 00:50:20,220
He tries to gather together
479
00:50:20,220 --> 00:50:21,700
as many hinds as he can.
480
00:50:23,700 --> 00:50:25,980
Perhaps 20 in all.
481
00:50:28,900 --> 00:50:31,820
Spy Squirrel is right
in the middle of his herd.
482
00:50:36,300 --> 00:50:38,700
But the stag has other
things on his mind.
483
00:50:41,300 --> 00:50:43,220
STAG BELLOWS
484
00:50:43,220 --> 00:50:46,580
In the rutting season,
he has his work cut out.
485
00:50:49,100 --> 00:50:51,340
Rounding up his straying hinds
486
00:50:51,340 --> 00:50:52,980
is a constant battle.
487
00:51:07,980 --> 00:51:12,260
But he has an even bigger
challenge - a rival.
488
00:51:13,900 --> 00:51:15,620
STAG BELLOWS
489
00:51:17,820 --> 00:51:21,220
A bevy of hinds
is just what he's looking for.
490
00:51:27,740 --> 00:51:30,180
Females will go with
the strongest stag.
491
00:51:30,180 --> 00:51:32,580
STAG BELLOWS
492
00:51:34,860 --> 00:51:38,260
The rival must fight
to prove his mettle.
493
00:51:38,260 --> 00:51:39,700
STAGS BELLOW
494
00:51:48,020 --> 00:51:50,100
Battle lines are drawn.
495
00:51:58,460 --> 00:52:00,940
One mistake could prove fatal.
496
00:52:03,260 --> 00:52:05,340
Whoever gains most ground wins.
497
00:52:08,940 --> 00:52:11,180
Victory for the reigning stag.
498
00:52:11,180 --> 00:52:12,780
STAG BELLOWS
499
00:52:12,780 --> 00:52:15,220
Spy Squirrel may be worse for wear,
500
00:52:15,220 --> 00:52:18,700
but he still captures one final
shot of the champion.
501
00:52:18,700 --> 00:52:20,300
STAG BELLOWS
502
00:52:26,700 --> 00:52:29,340
For the squirrels,
there's still one last nut
503
00:52:29,340 --> 00:52:31,860
they've yet to get their paws on.
504
00:52:41,700 --> 00:52:44,740
Another trophy to squirrel away.
505
00:52:57,020 --> 00:52:59,180
Back in Germany, among the beavers,
506
00:52:59,180 --> 00:53:01,420
autumn is also well underway.
507
00:53:02,900 --> 00:53:05,380
It won't be long
until the winter sets in.
508
00:53:10,980 --> 00:53:14,220
Before then, their lodge
must undergo some maintenance.
509
00:53:16,580 --> 00:53:18,820
Spy Beaver investigates.
510
00:53:22,100 --> 00:53:24,380
It's the beavers'
busiest time of year.
511
00:53:26,620 --> 00:53:29,340
They scour the river
for building material.
512
00:53:34,940 --> 00:53:38,300
Stones help stabilise
the lodge against flooding.
513
00:53:44,060 --> 00:53:47,700
Preparing their home for winter
is everyone's responsibility.
514
00:53:57,900 --> 00:54:00,660
Sticks and logs bring strength
to the structure.
515
00:54:08,820 --> 00:54:11,220
It can also be used to plug holes
516
00:54:11,220 --> 00:54:13,260
and reduce leaks
to the main chamber.
517
00:54:20,860 --> 00:54:23,420
Small sticks are used
to fill in the gaps.
518
00:54:25,340 --> 00:54:29,100
To cap it all, a thatch of turf
helps weatherproof the roof.
519
00:54:33,180 --> 00:54:36,180
On the river bank,
the whole family is hard at work
520
00:54:36,180 --> 00:54:38,420
collecting food
and nesting material.
521
00:54:44,340 --> 00:54:46,300
Even the youngsters do their bit.
522
00:54:53,020 --> 00:54:56,260
The beavers must harvest
what they can before winter sets in.
523
00:54:58,980 --> 00:55:01,380
Everything must be
ferried back home.
524
00:55:04,780 --> 00:55:07,540
The muskrat uses grass
as nesting material
525
00:55:07,540 --> 00:55:09,940
to furnish his own quarters
in the lodge.
526
00:55:19,900 --> 00:55:23,940
As winter approaches,
the beavers redouble their efforts.
527
00:55:37,300 --> 00:55:39,980
And the muskrat
gets ever more ambitious.
528
00:55:52,780 --> 00:55:55,060
With everyone working flat-out,
529
00:55:55,060 --> 00:55:57,860
they'll soon be ready
for the upcoming winter.
530
00:56:05,020 --> 00:56:07,900
They'll spend most of it
safely tucked up inside.
531
00:56:15,780 --> 00:56:17,580
As the year comes to an end,
532
00:56:17,580 --> 00:56:19,780
the snows have returned to Japan.
533
00:56:22,940 --> 00:56:25,980
Already, the macaques are
huddling together for warmth.
534
00:56:31,580 --> 00:56:33,420
Once more, their social life
535
00:56:33,420 --> 00:56:35,260
revolves around the hot tub.
536
00:56:41,460 --> 00:56:43,980
Our spies are at the end
of their mission.
537
00:56:49,980 --> 00:56:52,580
Sweet dreams soon come to all.
538
00:57:07,420 --> 00:57:09,980
Time-out for our
spy creatures, too.
539
00:57:16,940 --> 00:57:21,180
Next time - our spies travel to
the islands of the southern seas
540
00:57:21,180 --> 00:57:24,620
to meet yet more
extraordinary animals.
40123
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