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Experience a world
beyond imagination
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00:00:18,894 --> 00:00:21,730
where fish can fly...
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00:00:25,108 --> 00:00:27,528
lizards walk on water,
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00:00:29,238 --> 00:00:32,323
apes master tools
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00:00:33,951 --> 00:00:37,371
and frogs disappear
in plain sight.
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00:00:40,082 --> 00:00:43,544
Animals do the
smartest things...
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00:00:47,130 --> 00:00:49,383
through every stage
of their lives.
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00:00:50,551 --> 00:00:52,302
From leaving home...
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00:00:55,097 --> 00:00:56,765
to raising a family.
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00:00:59,768 --> 00:01:01,311
From finding food...
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00:01:03,522 --> 00:01:05,147
to making friends.
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00:01:09,111 --> 00:01:13,198
They find ingenious
ways to survive
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00:01:14,324 --> 00:01:16,368
against all odds.
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00:01:19,329 --> 00:01:24,501
Welcome to The Secret
Lives of Animals.
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00:01:34,970 --> 00:01:39,057
{\an8}Our brothers and sisters are
often the first friends we make.
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00:01:41,185 --> 00:01:44,563
And here on the tropical
shores of Central America...
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00:01:47,107 --> 00:01:50,235
almost a hundred siblings
are getting acquainted.
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00:01:54,615 --> 00:01:59,870
Calling from inside their eggs,
hatching their first plan.
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00:02:04,041 --> 00:02:09,045
An olive ridley sea turtle,
no bigger than your thumb,
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00:02:10,214 --> 00:02:15,427
faces a huge challenge
to make it to the ocean.
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00:02:18,180 --> 00:02:21,808
First, he must escape
his underground nest.
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00:02:25,020 --> 00:02:28,106
Alone, his chances of
getting out are slim.
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00:02:36,240 --> 00:02:37,865
But working together,
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00:02:37,866 --> 00:02:41,662
the turtle hatchlings tunnel
through over a foot of sand.
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00:02:52,214 --> 00:02:54,550
But they still have
a long way to go
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00:02:55,300 --> 00:02:57,761
and danger awaits.
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00:03:01,682 --> 00:03:06,436
Black vultures are gathering
and they're hungry.
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00:03:12,401 --> 00:03:16,405
Now, the genius of the turtle's
strategy becomes clear.
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00:03:19,283 --> 00:03:23,453
Across this beach, thousands
of nests have emerged.
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00:03:25,497 --> 00:03:29,960
Up to a million olive ridley
hatchlings can surface in a single day.
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00:03:31,587 --> 00:03:35,507
Some of the largest gatherings
of sea turtles on the planet.
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00:03:42,890 --> 00:03:44,266
By hatching together,
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00:03:45,392 --> 00:03:48,937
each turtle improves
their chances of survival.
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00:03:49,897 --> 00:03:53,317
And about 80% of hatchlings
make it to the ocean.
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00:04:03,452 --> 00:04:08,123
Working together, they've overcome
their first great challenge in life.
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00:04:11,460 --> 00:04:16,673
It just goes to show, it's not
only the fittest who survive.
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00:04:17,382 --> 00:04:19,343
It's often the friendliest.
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00:04:32,189 --> 00:04:35,692
The hot, dry forests
of Costa Rica.
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00:04:39,363 --> 00:04:43,659
Summer temperatures here reach a
searing 100 degrees Fahrenheit.
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00:04:49,373 --> 00:04:53,544
Life for this troop of
capuchin monkeys is tough.
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00:04:58,966 --> 00:05:02,886
They make it through these difficult
times with the support of friends.
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00:05:11,061 --> 00:05:16,149
But this youngster is new to the
group and doesn't have any yet.
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00:05:20,404 --> 00:05:22,030
He's desperately thirsty.
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00:05:26,994 --> 00:05:29,913
At this time of year,
water is scarce.
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00:05:31,665 --> 00:05:33,667
And the best drinking spot
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00:05:35,169 --> 00:05:38,297
is guarded by dominant
members of the troop.
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00:05:45,095 --> 00:05:50,100
But desperate times call
for desperate measures.
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00:05:52,477 --> 00:05:53,812
He tries his luck.
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00:06:24,760 --> 00:06:26,887
To get past the
dominant monkeys...
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00:06:28,555 --> 00:06:30,807
and get a much-needed drink,
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00:06:31,934 --> 00:06:33,852
he must make a friend.
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00:06:36,813 --> 00:06:39,023
And capuchins do that in a way
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00:06:39,024 --> 00:06:41,568
unlike any other animal,
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00:06:42,653 --> 00:06:45,197
with an extraordinary
test of trust...
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00:06:47,241 --> 00:06:49,868
that involves a
sensitive nose...
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00:06:53,038 --> 00:06:55,207
and razor-sharp fingernails.
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00:06:59,253 --> 00:07:02,923
Capuchins really must
pick their friends wisely.
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00:07:07,928 --> 00:07:08,929
Not quite.
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00:07:13,976 --> 00:07:15,936
Another lone capuchin.
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00:07:18,355 --> 00:07:20,232
This might be an opportunity.
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00:07:29,199 --> 00:07:31,201
He reaches for a finger
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00:07:33,078 --> 00:07:35,247
and guides it up his nostril...
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00:07:37,291 --> 00:07:39,126
very carefully.
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00:07:44,590 --> 00:07:49,553
Now, vulnerable, he's showing
trust in the other capuchin.
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00:07:52,347 --> 00:07:54,600
And when they
return the gesture,
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it's the start of a
beautiful friendship.
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00:08:08,530 --> 00:08:12,159
Together, they're ready
to take on the world.
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00:08:16,079 --> 00:08:17,080
First stop...
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00:08:19,750 --> 00:08:21,084
the water hole.
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00:08:24,963 --> 00:08:27,424
It's still fiercely guarded.
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00:08:35,182 --> 00:08:37,351
The youngster's
stopped in his tracks.
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00:08:38,519 --> 00:08:41,480
But this time,
someone has his back.
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00:08:48,779 --> 00:08:50,655
Combining forces,
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00:08:50,656 --> 00:08:54,826
they confront the guard
using a distinctive tactic.
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00:08:56,745 --> 00:08:59,581
With double the teeth
and double the power...
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00:09:04,378 --> 00:09:06,296
they gain the upper hand.
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00:09:10,843 --> 00:09:14,847
For these monkeys, two heads
really are better than one.
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00:09:18,141 --> 00:09:23,146
And they both finally get the
drink they so desperately need.
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00:09:31,947 --> 00:09:35,200
Having even one friend
can be a lifesaver.
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00:09:38,954 --> 00:09:41,456
So imagine having
hundreds of thousands.
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An army ant.
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00:09:46,128 --> 00:09:49,047
One of the rainforest's
smallest animals
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00:09:49,673 --> 00:09:52,843
but part of one of
its largest teams.
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00:09:57,723 --> 00:09:59,516
Up to a million strong,
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00:10:00,100 --> 00:10:03,020
this colony can't survive
long without eating.
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00:10:05,647 --> 00:10:07,023
So, every morning,
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00:10:07,024 --> 00:10:11,320
the best hunters leave
together with one mission.
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00:10:13,697 --> 00:10:15,199
To find food...
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and lots of it.
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00:10:20,954 --> 00:10:26,210
They keep in constant communication
through smell and touch.
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00:10:31,131 --> 00:10:35,636
And spread out into a
column 20 meters wide
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00:10:36,553 --> 00:10:39,431
to flush prey out of hiding.
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00:10:45,395 --> 00:10:46,480
A bush cricket.
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00:10:47,731 --> 00:10:50,359
Too big for an ant
to tackle alone,
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00:10:51,818 --> 00:10:53,111
but she doesn't have to.
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00:10:58,617 --> 00:11:01,828
She sends out an airborne
chemical signal...
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00:11:05,666 --> 00:11:07,918
calling for reinforcements.
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00:11:10,504 --> 00:11:13,924
Her friends respond
without delay.
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00:11:24,101 --> 00:11:28,187
Working together, army
ants can take down animals
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00:11:28,188 --> 00:11:31,525
one and a half thousand
times their own weight.
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00:11:34,903 --> 00:11:36,320
It's a good start,
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00:11:36,321 --> 00:11:40,200
but they need thousands of
insects to keep the colony alive.
103
00:11:44,746 --> 00:11:47,791
And finding food is
only half the battle.
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00:11:49,084 --> 00:11:51,920
They must now carry
it the ant-equivalent
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00:11:53,881 --> 00:11:59,803
of 22 miles back to
the growing nest.
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00:12:03,307 --> 00:12:06,810
But in a jungle full of
dead ends and detours,
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00:12:08,687 --> 00:12:10,856
that's a mammoth task.
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00:12:13,567 --> 00:12:15,235
With pinpoint precision,
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00:12:15,903 --> 00:12:20,574
these extraordinary creatures
create their very own highways.
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00:12:25,037 --> 00:12:26,997
Smaller obstacles
are no problem...
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00:12:29,333 --> 00:12:31,292
but to cross larger gaps,
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00:12:31,293 --> 00:12:35,255
they do something unrivaled
in the natural world.
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00:12:41,386 --> 00:12:44,056
The ants link legs...
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00:12:47,476 --> 00:12:52,731
and support each other to
engineer living bridges
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ten times their body length.
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00:13:03,951 --> 00:13:05,744
These superstructures
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00:13:06,286 --> 00:13:10,581
allow them to carry up
to 30,000 items of prey
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00:13:10,582 --> 00:13:16,004
back to feed the colony
every single day.
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00:13:21,343 --> 00:13:25,222
They say a problem shared
is a problem halved.
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00:13:28,058 --> 00:13:32,896
And often the most unlikely alliances
turn out to be the most fruitful.
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00:13:40,320 --> 00:13:42,155
A three-toed sloth.
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00:13:44,908 --> 00:13:47,327
The slowest mammal on Earth.
123
00:13:52,541 --> 00:13:57,087
And a prime target for the world's
most powerful bird of prey.
124
00:14:02,134 --> 00:14:03,594
The harpy eagle.
125
00:14:07,347 --> 00:14:10,684
Capable of flying at up
to 50 miles per hour.
126
00:14:15,981 --> 00:14:18,984
And sloths are on their menu.
127
00:14:23,238 --> 00:14:24,364
They can't run...
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00:14:26,533 --> 00:14:30,746
but a special relationship
might just help them hide.
129
00:14:33,081 --> 00:14:34,583
Sloth moths.
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00:14:38,712 --> 00:14:43,467
Up to 120 of them live exclusively
amongst a sloth's coat.
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00:14:48,597 --> 00:14:51,725
They may not seem like
good friendship material...
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00:14:54,186 --> 00:14:58,273
but almost all sloths
have moths as housemates.
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00:15:00,776 --> 00:15:02,653
And they're welcome guests.
134
00:15:05,364 --> 00:15:08,200
Scientists don't
know exactly why,
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00:15:08,992 --> 00:15:12,078
but the more moths
living on a sloth,
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00:15:12,079 --> 00:15:15,415
the more algae found in its fur.
137
00:15:18,669 --> 00:15:23,632
It's thought moths provide nutrients
that help the algae flourish.
138
00:15:24,508 --> 00:15:29,471
And algae turns their
coat forest green.
139
00:15:31,306 --> 00:15:34,893
Helping these laid-back
leaf-eaters hide
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00:15:36,520 --> 00:15:38,188
in plain sight.
141
00:15:41,733 --> 00:15:43,192
When life gets tough,
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00:15:43,193 --> 00:15:46,196
you need friends
that have your back.
143
00:15:53,745 --> 00:15:57,624
But even the strongest
friendships are open to betrayal.
144
00:15:59,835 --> 00:16:02,588
South Africa's Kalahari Desert.
145
00:16:05,674 --> 00:16:10,679
Here, meerkats feed on grubs
and bugs hidden underground
146
00:16:11,346 --> 00:16:13,432
for up to eight hours a day.
147
00:16:15,184 --> 00:16:17,769
But with their heads
buried in the sand,
148
00:16:18,270 --> 00:16:20,147
they're blind to danger.
149
00:16:22,107 --> 00:16:23,108
To keep safe...
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00:16:25,152 --> 00:16:29,990
they rely on friends
in high places.
151
00:16:31,658 --> 00:16:33,577
A fork-tailed drongo.
152
00:16:39,499 --> 00:16:44,505
From her vantage point, she
can spot danger a mile off.
153
00:16:48,592 --> 00:16:49,801
A tawny eagle.
154
00:16:50,886 --> 00:16:52,971
A meerkat's worst nightmare.
155
00:16:57,601 --> 00:16:59,478
The drongo sounds the alarm.
156
00:17:07,944 --> 00:17:10,696
A meerkat call
confirms the danger.
157
00:17:16,744 --> 00:17:19,540
Some friends you simply
can't live without...
158
00:17:22,416 --> 00:17:26,088
but she's not as
selfless as it seems.
159
00:17:29,132 --> 00:17:30,801
There's something in it for her.
160
00:17:32,970 --> 00:17:34,304
A juicy grub...
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00:17:37,015 --> 00:17:38,892
abandoned by the meerkats.
162
00:17:42,104 --> 00:17:43,355
Once she's finished...
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00:17:46,483 --> 00:17:48,193
she lets them know
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00:17:49,695 --> 00:17:52,447
it's safe to go
back to foraging.
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00:17:59,121 --> 00:18:00,205
A scorpion.
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00:18:01,540 --> 00:18:03,208
A meerkat's favorite meal.
167
00:18:05,169 --> 00:18:07,880
And so irresistible to a drongo,
168
00:18:08,881 --> 00:18:11,842
she'll test their
friendship to get it.
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00:18:20,642 --> 00:18:22,561
She makes another alarm call.
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00:18:23,687 --> 00:18:26,106
This time, it's a trick.
171
00:18:28,066 --> 00:18:29,651
There's no sign of danger,
172
00:18:31,236 --> 00:18:33,864
and the meerkats aren't
so easily fooled.
173
00:18:36,033 --> 00:18:39,703
So she tries something
even sneakier.
174
00:18:41,580 --> 00:18:43,290
A call they can't ignore.
175
00:18:45,542 --> 00:18:49,880
A faultless imitation of
a meerkat's own alarm.
176
00:19:05,437 --> 00:19:08,732
Now the drongo gets
exactly what she wants.
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00:19:13,362 --> 00:19:15,447
Sometimes she's selfish.
178
00:19:20,452 --> 00:19:22,371
But meerkats are smart
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00:19:23,163 --> 00:19:26,083
and they know they're
better off with her around.
180
00:19:32,256 --> 00:19:34,132
No friend is perfect...
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00:19:36,802 --> 00:19:40,889
but there are times in life when
you simply can't afford to be picky.
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00:19:44,768 --> 00:19:46,270
The Peruvian jungle...
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00:19:48,981 --> 00:19:49,982
at night.
184
00:19:51,692 --> 00:19:55,529
Here, danger lurks
around every corner.
185
00:19:57,281 --> 00:20:01,869
Especially when you're
just the size of a grape.
186
00:20:03,787 --> 00:20:06,665
Like this reticulated
humming frog.
187
00:20:08,709 --> 00:20:10,169
The perfect meal...
188
00:20:16,300 --> 00:20:19,136
for a banded cat-eyed snake.
189
00:20:21,180 --> 00:20:23,307
Armed with excellent
night vision,
190
00:20:24,641 --> 00:20:26,810
and an incredible
sense of smell...
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00:20:33,483 --> 00:20:37,196
he can run, but he can't hide.
192
00:20:54,713 --> 00:20:58,425
If ever he needed
a friend, it's now.
193
00:21:03,889 --> 00:21:04,890
A tarantula...
194
00:21:06,934 --> 00:21:08,936
armed and dangerous.
195
00:21:23,700 --> 00:21:26,703
But not to reticulated
humming frogs.
196
00:21:28,622 --> 00:21:31,041
She provides them protection.
197
00:21:36,296 --> 00:21:38,631
Capable of attacking snakes,
198
00:21:38,632 --> 00:21:42,678
tarantulas are the jungle's
most unlikely heroes.
199
00:21:46,682 --> 00:21:49,559
This is an
extraordinary friendship
200
00:21:49,560 --> 00:21:52,521
that few people
have ever witnessed.
201
00:21:53,897 --> 00:21:59,486
And like all the best relationships,
there's something in it for both of them.
202
00:22:06,076 --> 00:22:08,829
This tarantula also
has a problem...
203
00:22:10,372 --> 00:22:12,666
parasites she can't reach.
204
00:22:14,543 --> 00:22:16,795
They could be irritating to her,
205
00:22:18,714 --> 00:22:20,841
but these frogs
dine out on them.
206
00:22:25,679 --> 00:22:28,097
It's a pairing so successful
207
00:22:28,098 --> 00:22:31,601
that frogs and tarantulas
are found living together
208
00:22:31,602 --> 00:22:34,354
in jungles across the world.
209
00:22:39,276 --> 00:22:40,903
When life gets difficult,
210
00:22:42,279 --> 00:22:45,532
there's nothing better than
having someone to lean on.
211
00:22:52,664 --> 00:22:55,792
With friendship comes
great rewards...
212
00:22:58,462 --> 00:22:59,755
security...
213
00:23:03,967 --> 00:23:04,968
support...
214
00:23:07,888 --> 00:23:09,890
even lifesaving protection.
215
00:23:13,143 --> 00:23:16,395
It's no wonder, with
friends by our side,
216
00:23:16,396 --> 00:23:21,485
we live longer,
healthier and happier.
217
00:23:30,994 --> 00:23:33,205
To film army ants
building bridges,
218
00:23:33,872 --> 00:23:36,500
the team headed to Costa Rica.
219
00:23:38,585 --> 00:23:39,920
Welcome to the jungle.
220
00:23:41,338 --> 00:23:43,256
In the dense rainforest,
221
00:23:43,257 --> 00:23:47,635
finding the ants is only possible
with a highly trained eye.
222
00:23:47,636 --> 00:23:49,512
{\an8}The challenging part
is that they're rare
223
00:23:49,513 --> 00:23:52,306
{\an8}and so you often have
to travel long distances
224
00:23:52,307 --> 00:23:53,684
{\an8}through the forest to find them.
225
00:23:54,810 --> 00:23:59,105
After several hours of
searching, Sean strikes gold.
226
00:23:59,106 --> 00:24:00,732
We've hit pay dirt.
227
00:24:01,233 --> 00:24:02,943
There they are. We've found it.
228
00:24:04,862 --> 00:24:06,947
Now, filming can begin.
229
00:24:09,283 --> 00:24:12,243
{\an8}The bridge is the thing that we
wanna get more than anything else.
230
00:24:12,244 --> 00:24:15,873
{\an8}It's the best example of teamwork,
probably, that we can see.
231
00:24:16,540 --> 00:24:19,543
But it's immediately clear
it will be a challenge.
232
00:24:20,711 --> 00:24:24,005
{\an8}They are fast, they're small,
and it's just really hard
233
00:24:24,006 --> 00:24:26,425
{\an8}to get the equipment
close up to them.
234
00:24:27,801 --> 00:24:30,721
And it's not just their
speed that's a problem.
235
00:24:31,305 --> 00:24:33,265
Soldier ant! It won't...
236
00:24:34,433 --> 00:24:38,187
It's like having a hot needle
stabbed into your skin.
237
00:24:39,646 --> 00:24:41,355
I've got ants all over me.
238
00:24:41,356 --> 00:24:43,442
Well, they're all
over the camera.
239
00:24:44,151 --> 00:24:48,112
They've bitten us, stung
us, and we're out of here.
240
00:24:48,113 --> 00:24:49,198
We're fleeing.
241
00:24:51,241 --> 00:24:54,368
To have any chance of filming
the ants' bridge-building,
242
00:24:54,369 --> 00:24:57,080
they'll need to
rethink their strategy.
243
00:24:58,457 --> 00:25:00,416
We're having to come up
with some ingenious methods
244
00:25:00,417 --> 00:25:02,335
of stopping them
climbing up your Wellies.
245
00:25:02,336 --> 00:25:06,340
So Mark has got gaffer tape
wrapped around his boots.
246
00:25:09,009 --> 00:25:10,510
It's an amazing,
simple solution.
247
00:25:10,511 --> 00:25:12,136
It's just really slippery.
248
00:25:12,137 --> 00:25:14,014
Today, I haven't
been bothered at all.
249
00:25:14,640 --> 00:25:17,392
And that's not the team's
only stroke of genius.
250
00:25:18,185 --> 00:25:22,439
Every time an ant gets on a
lens or a lead or a light,
251
00:25:23,065 --> 00:25:26,652
we brush the ant off with
our ethical ant-remover.
252
00:25:27,861 --> 00:25:32,574
But as quickly as they solve two
problems, a bigger one emerges.
253
00:25:33,492 --> 00:25:36,745
Well, I just did my
morning check and...
254
00:25:37,704 --> 00:25:40,373
it's a little frustrating
'cause the ants are gone.
255
00:25:40,374 --> 00:25:42,291
So, we have more
work ahead of us.
256
00:25:42,292 --> 00:25:44,211
We're gonna have to
keep tracking the ants.
257
00:25:47,339 --> 00:25:49,508
There's only one more
day of filming to go...
258
00:25:51,844 --> 00:25:55,973
and the team has no idea
where the colony has gone.
259
00:25:56,557 --> 00:25:58,517
Feeling a bit worried.
A bit pressured.
260
00:26:00,811 --> 00:26:02,646
Just as they're
giving up hope...
261
00:26:05,065 --> 00:26:06,482
There it is.
262
00:26:06,483 --> 00:26:08,401
This is definitely
where they're building,
263
00:26:08,402 --> 00:26:10,988
and hopefully they'll build
us some beautiful bridges.
264
00:26:12,656 --> 00:26:14,700
The team's luck has changed.
265
00:26:15,200 --> 00:26:19,704
Just below their feet,
construction has begun.
266
00:26:19,705 --> 00:26:23,917
So, we're throwing everything at it, and
seeing if we can get some good shots.
267
00:26:24,418 --> 00:26:25,626
Yeah. Learning from the ants.
268
00:26:25,627 --> 00:26:26,878
Working together as a team
269
00:26:26,879 --> 00:26:29,548
to try and make the most of this
one opportunity that we've got.
270
00:26:30,048 --> 00:26:33,719
But these master builders
don't stop at one bridge.
271
00:26:40,475 --> 00:26:43,103
Oh, wow. That's beautiful.
272
00:26:45,731 --> 00:26:48,149
You can see all their legs
silhouetted against the forest.
273
00:26:48,150 --> 00:26:50,485
How they're all interlinked.
It's incredible.
274
00:26:51,987 --> 00:26:54,823
I think this is one of the
greatest events in all of biology.
275
00:26:57,034 --> 00:27:01,078
It all came down to the
wire on the last day,
276
00:27:01,079 --> 00:27:02,164
but we did it.
277
00:27:07,002 --> 00:27:08,086
Next time...
278
00:27:09,296 --> 00:27:12,758
Finding a partner
is a labor of love.
279
00:27:15,260 --> 00:27:19,014
One mistake can
leave you lonely.
280
00:27:22,059 --> 00:27:24,978
But if you show
off your best side
281
00:27:26,355 --> 00:27:28,232
and make a good impression,
282
00:27:29,983 --> 00:27:34,196
you might just meet
your perfect match.
20548
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