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\h\h\h\h\h\h\h\h\h\hThe wilds of Zambia
are a tough place to live.
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00:00:08,467 --> 00:00:10,344
Danger lurks everywhere.
3
00:00:13,055 --> 00:00:17,101
In order to survive,
all animals need a strategy.
4
00:00:20,854 --> 00:00:23,190
Some are solitary...
5
00:00:25,484 --> 00:00:29,279
Hunting alone with only
themselves to look after.
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00:00:33,450 --> 00:00:36,954
Others have a different way
of doing things.
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00:00:37,621 --> 00:00:41,125
They come together
in groups of all sizes.
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00:00:43,794 --> 00:00:46,797
Helping each other
to defend territory...
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00:00:51,969 --> 00:00:54,513
Protect offspring...
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00:00:55,514 --> 00:00:57,516
Find food...
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00:00:58,016 --> 00:01:00,435
And to overcome predators.
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00:01:03,230 --> 00:01:07,901
This is the story
of Africa’s social animals
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00:01:07,943 --> 00:01:09,862
and why working together
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00:01:09,903 --> 00:01:14,241
can mean the difference
between life and death.
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00:01:16,285 --> 00:01:18,329
(MUSIC PLAYING)
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00:01:44,730 --> 00:01:48,943
This small buffalo calf,
just four months old,
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00:01:48,984 --> 00:01:53,447
follows his mother through
Zambia’s Luangwa Valley.
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00:01:57,868 --> 00:02:03,290
He’s part of a huge herd,
1000 strong,
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00:02:03,332 --> 00:02:05,501
made up of 50 families
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00:02:05,542 --> 00:02:08,587
all sticking together
for protection.
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00:02:10,422 --> 00:02:12,466
There’s safety in numbers
22
00:02:12,507 --> 00:02:17,512
but keeping such an enormous
group together is hard work.
23
00:02:18,472 --> 00:02:22,267
Getting separated
could be disastrous,
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00:02:24,019 --> 00:02:27,564
especially
for the young buffalo.
25
00:02:30,901 --> 00:02:35,447
But the herd has a strategy
to maintain cohesion.
26
00:02:38,450 --> 00:02:42,287
A few go up front
as trusted pathfinders,
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00:02:42,621 --> 00:02:46,416
leading the others
to fresh grass and water.
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00:02:47,751 --> 00:02:52,422
These aren’t necessarily
the most dominant
or oldest animals,
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00:02:52,464 --> 00:02:56,385
but it’s always
the same select few
that take on this role.
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00:02:59,513 --> 00:03:02,474
Where these buffalos go,
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00:03:03,433 --> 00:03:05,477
the others follow.
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00:03:09,106 --> 00:03:12,610
But the level of organization
goes further than that.
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00:03:14,611 --> 00:03:17,531
A calf is kept safe
in the centre,
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00:03:17,572 --> 00:03:21,409
along with his mother
and the other
breeding females.
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00:03:23,745 --> 00:03:27,999
More expendable,
bachelor males
and the sick or injured
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00:03:28,041 --> 00:03:30,669
are pushed to the periphery.
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00:03:32,587 --> 00:03:33,922
Like the pathfinders,
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00:03:35,382 --> 00:03:38,677
those on the edges
are always on the alert.
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00:03:47,436 --> 00:03:49,897
And they’ve spotted danger.
40
00:03:52,482 --> 00:03:56,778
A lion is stalking the animals
at the tail end of the herd.
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00:04:04,661 --> 00:04:07,539
When one buffalo runs,
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00:04:07,581 --> 00:04:11,960
the herd mentality kicks in
and they all make a move.
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00:04:29,478 --> 00:04:33,065
This time, an adult male
who was bringing up the rear
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00:04:33,106 --> 00:04:35,609
has been taken down.
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00:04:37,694 --> 00:04:40,947
But the calf is safe.
46
00:04:42,073 --> 00:04:45,660
The herd’s strategy
has worked well.
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00:04:45,994 --> 00:04:48,038
By saving the young ones,
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00:04:48,079 --> 00:04:51,666
the future of the group
has been safeguarded.
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00:04:52,918 --> 00:04:55,587
The calf can continue
its long journey
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00:04:55,629 --> 00:04:57,506
to find food and water,
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00:04:57,547 --> 00:05:00,675
covering over 10 miles a day.
52
00:05:05,639 --> 00:05:08,976
Buffalo are constantly
on the move.
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00:05:14,189 --> 00:05:17,609
But while they need
to keep traveling,
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00:05:17,651 --> 00:05:22,948
their arch nemeses
can wait for their food
to come to them.
55
00:05:31,248 --> 00:05:34,752
Lions are the most social
of all cats.
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00:05:39,923 --> 00:05:44,845
They live in prides made up
of related females,
their offspring,
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00:05:44,886 --> 00:05:47,722
and a coalition of males,
often brothers,
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00:05:47,764 --> 00:05:49,975
who join from elsewhere.
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00:05:52,185 --> 00:05:56,648
A pride’s main purpose
is to hold a territory.
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00:05:59,901 --> 00:06:03,530
Having a territory means
having enough food and water
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00:06:03,572 --> 00:06:05,824
to feed the whole pride,
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00:06:06,867 --> 00:06:09,912
even when times are hard.
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00:06:12,998 --> 00:06:15,959
This prides’ prime piece
of real estate
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00:06:16,001 --> 00:06:21,089
stretches over
20 square miles
along the Luangwa River.
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00:06:21,715 --> 00:06:22,758
(ROARS)
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00:06:29,973 --> 00:06:32,517
NARRATOR:
\hIt’s their safe space.
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00:06:36,563 --> 00:06:38,732
The brothers
make regular patrols
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00:06:38,773 --> 00:06:40,733
to make sure
it stays that way.
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00:06:49,868 --> 00:06:51,036
(GROWLING)
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00:06:54,122 --> 00:06:57,834
NARRATOR:
\hTheir powerful roars
\htravel over five miles
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00:06:57,876 --> 00:07:00,754
to reinforce their claim.
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00:07:09,930 --> 00:07:12,891
They wipe their feet in urine
packed with hormones,
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00:07:12,933 --> 00:07:16,687
which advertise
their health and vitality,
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00:07:17,896 --> 00:07:20,899
ensuring they leave
a potent-smelling track
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00:07:20,941 --> 00:07:22,651
wherever they walk.
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00:07:25,111 --> 00:07:28,072
A warning to others
to keep out.
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00:07:30,367 --> 00:07:33,871
Rival lions respect
these invisible boundaries.
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00:07:35,330 --> 00:07:38,625
Two prides’ territories
may overlap,
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00:07:38,667 --> 00:07:41,879
but the lions rarely come
into contact with each other.
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00:07:44,214 --> 00:07:46,717
So once they’ve made a kill,
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00:07:46,758 --> 00:07:50,095
there’s little danger
of having it snatched away.
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00:08:05,276 --> 00:08:09,071
The big, strong males do
most of the territory defense
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00:08:09,114 --> 00:08:11,575
and they get to eat first.
84
00:08:18,081 --> 00:08:20,250
Only once
they’ve had their fill,
85
00:08:20,291 --> 00:08:23,044
do the females and cubs
get to dig in.
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00:08:41,146 --> 00:08:43,231
Scent marking the bush,
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00:08:43,273 --> 00:08:45,984
the male leaves
one last reminder
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00:08:46,026 --> 00:08:49,196
that all this
belongs to his pride.
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00:08:53,283 --> 00:08:56,077
A well-defended territory
is crucial
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00:08:56,119 --> 00:08:58,330
if they’re to continue
to thrive.
91
00:09:10,008 --> 00:09:12,636
It’s not just lions
that band together
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00:09:12,677 --> 00:09:15,597
to protect their territory
from rivals.
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00:09:17,265 --> 00:09:21,895
Hyenas also cooperate
to defend their home base,
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00:09:21,936 --> 00:09:26,691
living in clans much larger
than the average lion pride.
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00:09:31,196 --> 00:09:33,323
Twenty make up this unit,
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00:09:33,364 --> 00:09:38,286
but they can be 80 strong
and are a formidable force.
97
00:09:45,085 --> 00:09:49,798
Hyenas unite to defend
their terrain and to hunt,
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00:09:53,843 --> 00:09:56,763
but their teamwork
stops there.
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00:10:03,269 --> 00:10:06,814
After a kill,
each hyena tries to eat
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00:10:06,856 --> 00:10:09,359
as much as it can
as quickly as possible
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00:10:09,400 --> 00:10:11,903
to beat the others.
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00:10:17,826 --> 00:10:21,330
It’s an openly competitive
society.
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(HYENAS SCREAMING)
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NARRATOR:
\hIn the world of hyenas,
\hit’s the females who rule.
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00:10:42,809 --> 00:10:45,437
They’re the biggest animals
in the clan
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00:10:45,478 --> 00:10:48,815
and more aggressive
than the males,
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00:10:48,857 --> 00:10:52,819
easily outmuscling them
in the fight for a meal.
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00:10:54,404 --> 00:10:58,325
And one in particular
always comes out on top.
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00:10:59,367 --> 00:11:01,870
The dominant female.
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Her level
of male sex hormones,
especially testosterone,
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00:11:07,458 --> 00:11:09,961
is one of the highest
in the clan,
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00:11:10,003 --> 00:11:12,881
even higher
than most of the males.
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00:11:13,381 --> 00:11:17,468
She’s the leader
and every other hyena
knows its place.
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00:11:18,970 --> 00:11:21,473
They can be the family
from hell.
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00:11:23,349 --> 00:11:26,394
Life in the clan
is a race to supremacy,
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00:11:27,437 --> 00:11:30,690
and it begins at birth.
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00:11:35,486 --> 00:11:38,864
The more food
the alpha female eats,
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00:11:38,907 --> 00:11:42,744
the more milk she produces
to feed her babies.
119
00:11:44,245 --> 00:11:48,624
Her cubs will have
a nutritional advantage
over all the others,
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00:11:48,666 --> 00:11:50,918
setting them up for life.
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00:11:56,132 --> 00:12:00,136
There’s no shared suckling
and little communal parenting.
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00:12:02,931 --> 00:12:08,770
Defending their territory
is one of the main reasons
to live in a clan,
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00:12:09,103 --> 00:12:13,190
but after that,
it’s every hyena for itself.
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00:12:28,373 --> 00:12:32,586
For wild dogs,
it’s a completely
different story.
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00:12:33,461 --> 00:12:36,297
Teamwork is everything.
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00:12:38,466 --> 00:12:41,970
Especially,
when it comes to caring
for the next generation.
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00:12:45,848 --> 00:12:48,934
This wild dog pack
has 12 members,
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00:12:48,977 --> 00:12:52,105
led by the alpha male
and female.
129
00:12:53,189 --> 00:12:56,693
Usually, it’s only this pair
that breeds.
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00:12:58,820 --> 00:13:02,949
They have such large litters,
up to 10 pups at a time,
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00:13:02,991 --> 00:13:07,078
that there’s no way
the group could feed
two litters at once.
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00:13:08,705 --> 00:13:10,790
The other dogs
must wait to breed
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00:13:10,832 --> 00:13:13,501
until they’ve left
the family,
134
00:13:13,543 --> 00:13:17,130
but in the meantime,
they help out with childcare.
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00:13:19,632 --> 00:13:22,260
This pack
has seven energetic pups
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00:13:22,302 --> 00:13:25,722
that have to be cared for
until they’re over a year old,
137
00:13:25,763 --> 00:13:30,184
so the alpha pair needs
the help of the whole family
to look after them.
138
00:13:37,108 --> 00:13:38,860
While the pack goes hunting,
139
00:13:39,193 --> 00:13:41,779
the pups can’t be left
on their own.
140
00:13:43,072 --> 00:13:46,784
So one of their older siblings
stays behind as a babysitter
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00:13:46,826 --> 00:13:49,996
to make sure
they don’t get into trouble.
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00:14:11,267 --> 00:14:14,771
For now, the youngsters
get their meals delivered.
143
00:14:15,396 --> 00:14:18,900
But soon, they’ll be able
to follow the hunt.
144
00:14:19,567 --> 00:14:23,696
And, unlike all other
larger African carnivores,
145
00:14:23,738 --> 00:14:28,076
they’ll have priority
at the kill, not the adults.
146
00:14:28,701 --> 00:14:32,205
They’re one big happy family.
147
00:14:32,872 --> 00:14:37,085
Safeguarding this bloodline
is key to everyone’s survival.
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00:14:38,753 --> 00:14:42,966
The bigger the pack,
the more likely they are
to do well.
149
00:14:44,759 --> 00:14:49,430
Any pack with fewer than
five adults struggles
to keep its pups alive,
150
00:14:49,472 --> 00:14:52,225
jeopardizing
the group’s entire existence.
151
00:15:10,743 --> 00:15:12,578
For any animal,
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00:15:12,620 --> 00:15:16,165
raising young in such
a ruthless environment
is demanding.
153
00:15:19,377 --> 00:15:22,881
It’s far easier to do it
with extra help.
154
00:15:24,132 --> 00:15:29,638
While it’s not uncommon
for mammals to collaborate
to bring up their offspring,
155
00:15:31,180 --> 00:15:34,350
it’s far more unusual
in birds.
156
00:15:38,646 --> 00:15:41,107
But there’s one species
in the avian world
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00:15:41,149 --> 00:15:43,860
that is known
for its complex society,
158
00:15:45,153 --> 00:15:48,448
all built around
caring for its chicks.
159
00:15:56,164 --> 00:15:59,459
On an exposed bank
of the Luangwa River,
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00:15:59,876 --> 00:16:04,923
these white-fronted bee-eaters
live in a colony of 200 birds.
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00:16:06,424 --> 00:16:09,928
Within the colony,
there are 20 different
family lines.
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00:16:16,851 --> 00:16:22,106
This pair has mated for life
and could have up to
five chicks in the nest.
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00:16:23,566 --> 00:16:26,694
It’s hard work
feeding all those hatchlings.
164
00:16:27,737 --> 00:16:32,742
On their own, these parents
would be lucky if even one
manages to survive.
165
00:16:37,330 --> 00:16:41,626
So to improve the odds,
they have a strategy.
166
00:16:47,590 --> 00:16:50,968
They get help from
their nearest and dearest,
167
00:16:51,636 --> 00:16:55,056
often their offspring
from previous years.
168
00:16:57,558 --> 00:16:59,810
These relatives
become helpers,
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00:16:59,852 --> 00:17:02,480
bringing more food
for the hungry chicks
170
00:17:02,522 --> 00:17:06,276
and doubling their chance
of making it to adulthood.
171
00:17:11,113 --> 00:17:14,908
The bee-eater assistants
switch between
breeder and helper
172
00:17:14,951 --> 00:17:18,163
many times over a lifetime,
173
00:17:18,829 --> 00:17:23,834
depending on whether
they have their own brood
to raise or not.
174
00:17:33,469 --> 00:17:36,305
But with all these clans
in one place,
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00:17:36,347 --> 00:17:38,599
things can get
a little heated.
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00:17:45,523 --> 00:17:49,861
And when a rival tries
to gain access to the nest,
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00:17:49,902 --> 00:17:53,280
the helpers launch
into action.
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00:17:57,868 --> 00:18:02,247
A competing female
may lay her egg in the nest.
179
00:18:04,333 --> 00:18:06,460
With one more mouth to feed,
180
00:18:06,502 --> 00:18:10,214
it would be less likely
the chicks of the nest owner
would survive.
181
00:18:21,726 --> 00:18:24,312
No harm done this time,
182
00:18:24,353 --> 00:18:26,814
just a few ruffled feathers.
183
00:18:28,774 --> 00:18:32,403
Division of labour between
members of the extended family
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00:18:32,445 --> 00:18:34,864
helps keep
the vulnerable alive
185
00:18:34,905 --> 00:18:38,492
and perpetuate their
shared genes into the future.
186
00:18:40,411 --> 00:18:43,039
This unusual strategy
of clan living
187
00:18:43,080 --> 00:18:46,458
ultimately benefits
each bird in the long run.
188
00:18:48,669 --> 00:18:53,299
But one insect
has taken this approach
a giant step further.
189
00:18:57,928 --> 00:19:01,432
Matabele ants
live in colonies
of up to 20 million.
190
00:19:02,850 --> 00:19:05,394
They’re one of the world’s
largest ants,
191
00:19:05,436 --> 00:19:08,856
over three quarters
of an inch long.
192
00:19:09,732 --> 00:19:13,236
The queen lays
hundreds of eggs a day.
193
00:19:14,695 --> 00:19:17,364
But no other female
in this colony
194
00:19:17,406 --> 00:19:20,659
even has the chance
to reproduce.
195
00:19:21,494 --> 00:19:23,705
They’re all born sterile.
196
00:19:28,376 --> 00:19:33,381
This female workforce
focuses on specific tasks
within the colony.
197
00:19:39,428 --> 00:19:42,681
Some are soldiers defending
the nest from outsiders.
198
00:19:46,811 --> 00:19:50,898
Others have the job of
protecting the all-important
white larvae.
199
00:19:53,818 --> 00:19:56,112
When they move to a new nest,
200
00:19:56,153 --> 00:20:00,449
the worker ants carefully
carry the white packages
to the next location.
201
00:20:01,826 --> 00:20:05,580
It’s vital they’re kept safe
for the future of the colony.
202
00:20:14,004 --> 00:20:16,924
The workers individual ability
to reproduce
203
00:20:16,966 --> 00:20:19,635
has been curtailed
for the greater good.
204
00:20:22,680 --> 00:20:26,809
And for Matabele ants,
it’s a price worth paying.
205
00:20:31,439 --> 00:20:33,441
With millions of ants to feed,
206
00:20:33,482 --> 00:20:36,860
it doesn’t take long to
exhaust the local food supply.
207
00:20:39,655 --> 00:20:42,533
So the whole colony
has to pull up stakes
208
00:20:42,575 --> 00:20:45,828
and move to a new nest
every month.
209
00:21:01,010 --> 00:21:04,514
There is a downside
to living in a group.
210
00:21:05,765 --> 00:21:09,018
Finding sufficient food
isn’t easy.
211
00:21:13,773 --> 00:21:17,527
Wild dogs are locked
in a vicious circle.
212
00:21:17,985 --> 00:21:20,488
With so many mouths to feed,
213
00:21:20,529 --> 00:21:23,782
they have to catch animals
of a certain size.
214
00:21:24,742 --> 00:21:29,497
But since they’re not
the strongest or largest
animals in the Valley,
215
00:21:29,538 --> 00:21:34,668
they must have a critical mass
of hunting dogs
to catch a prey that big.
216
00:21:35,920 --> 00:21:37,713
Only by hunting together
217
00:21:37,755 --> 00:21:40,883
can they bring down quarry
large enough to feed them all.
218
00:21:48,641 --> 00:21:51,519
The whole pack treks
up to 30 miles
219
00:21:51,560 --> 00:21:54,813
along the Luangwa Valley
each day in search of food.
220
00:21:57,775 --> 00:21:59,902
And they’ve found
what they were looking for.
221
00:22:01,612 --> 00:22:03,405
Antelope.
222
00:22:09,870 --> 00:22:14,875
The alpha male takes
the lead to begin with
and the others follow.
223
00:22:21,674 --> 00:22:25,845
But all the dogs know the role
they each need to play.
224
00:22:32,977 --> 00:22:36,731
Working together,
they outmaneuver their prey.
225
00:22:38,858 --> 00:22:43,738
Antelope run in circles
or zigzags to try and
throw off their pursuers.
226
00:22:44,864 --> 00:22:47,033
But the dogs are onto them.
227
00:22:47,992 --> 00:22:50,077
They cut across the bend
228
00:22:50,119 --> 00:22:53,080
and shorten the gap
between them and their prey.
229
00:22:58,752 --> 00:23:01,213
They work like a tag team,
230
00:23:01,255 --> 00:23:04,008
the lead dog
changing all the time.
231
00:23:04,842 --> 00:23:06,844
It’s an effective tactic.
232
00:23:12,641 --> 00:23:16,478
Up to 80% of chases
ends with a kill.
233
00:23:25,070 --> 00:23:29,074
Teaming up is the only way
wild dogs can succeed.
234
00:23:31,076 --> 00:23:33,996
But for the largest
of Africa’s carnivores,
235
00:23:34,038 --> 00:23:37,667
hunting solo
is a viable option.
236
00:23:44,840 --> 00:23:50,554
A solitary lion can bring down
a buffalo up to twice
his own weight.
237
00:23:52,056 --> 00:23:56,852
But he too is far more
effective when working with
the rest of the pride,
238
00:24:01,607 --> 00:24:03,943
almost doubling
his success rate.
239
00:24:08,197 --> 00:24:11,158
Night-time is the best time
to hunt.
240
00:24:17,289 --> 00:24:22,211
The lions’ excellent
night vision gives them
an edge over the antelope.
241
00:24:26,173 --> 00:24:28,801
And they have a plan.
242
00:24:34,848 --> 00:24:39,102
Some go round the outside,
encircling their target.
243
00:24:41,939 --> 00:24:45,192
While others lie low
in the centre,
244
00:24:45,776 --> 00:24:49,989
in anticipation of prey
fleeing into their
waiting claws.
245
00:24:57,037 --> 00:25:01,667
Lions can only maintain
their top speed
of 35 mph
246
00:25:01,709 --> 00:25:04,337
for 100 yards.
247
00:25:04,378 --> 00:25:08,966
So they have to get
as close as possible
before they make their move.
248
00:25:55,220 --> 00:25:57,931
It doesn’t always work.
249
00:25:58,807 --> 00:26:02,060
This time,
the antelope slips the trap.
250
00:26:05,773 --> 00:26:09,694
The lions must regroup
and try again later.
251
00:26:17,910 --> 00:26:22,832
Even working together,
only one in three
lion hunts is successful.
252
00:26:24,166 --> 00:26:29,129
But with size in their favor,
they have another option.
253
00:26:35,427 --> 00:26:39,139
They can easily overpower
other hunters in the bush.
254
00:26:45,896 --> 00:26:51,318
This leopard stands
little chance against
a hungry pride of lions.
255
00:27:31,775 --> 00:27:33,944
She can only watch
256
00:27:34,987 --> 00:27:38,282
as the lions
get their meal at last.
257
00:27:56,383 --> 00:28:00,220
Banding together to increase
your chances of getting food
258
00:28:00,262 --> 00:28:03,265
is not just a strategy
for predators.
259
00:28:07,394 --> 00:28:10,939
A guinea fowl flock travels
around the Luangwa Valley,
260
00:28:12,441 --> 00:28:15,736
scratching at the soil
with their strong claws,
261
00:28:16,403 --> 00:28:19,323
searching for seeds,
fruits, ticks
262
00:28:19,364 --> 00:28:21,157
and other small
invertebrates.
263
00:28:29,958 --> 00:28:35,005
For this little community,
life revolves around
the dominant male.
264
00:28:35,797 --> 00:28:38,383
He’s their undoubted leader
265
00:28:38,425 --> 00:28:41,595
and decides where they forage
and when to drink.
266
00:28:58,278 --> 00:29:01,323
And when he finds
a new food source,
267
00:29:01,365 --> 00:29:03,409
he doesn’t keep it
to himself.
268
00:29:03,450 --> 00:29:05,243
(CHIRPING)
269
00:29:05,285 --> 00:29:06,870
A food call.
270
00:29:11,500 --> 00:29:14,253
He really wants
to attract a female,
271
00:29:14,294 --> 00:29:16,546
showing her
he’s a good provider.
272
00:29:24,096 --> 00:29:27,600
But it spurs all the other
birds into action too.
273
00:29:38,402 --> 00:29:40,779
The mood may be spoiled
274
00:29:42,072 --> 00:29:45,659
but at least
the rest of the flock
gets something to eat.
275
00:29:50,956 --> 00:29:54,460
Guinea fowl can live
in groups of up to a hundred
276
00:29:54,751 --> 00:29:57,462
and have alarm calls
for predators.
277
00:30:11,518 --> 00:30:16,314
With so many lookouts,
they can forage
with scarce ground cover,
278
00:30:16,356 --> 00:30:19,860
which would otherwise
leave them exposed
and vulnerable.
279
00:30:21,737 --> 00:30:23,864
The more eyes and ears
there are,
280
00:30:23,905 --> 00:30:26,825
the more likely
a hunter is detected.
281
00:30:29,286 --> 00:30:31,580
This collective action
against attack
282
00:30:31,621 --> 00:30:34,707
is perhaps the best reason
for living together.
283
00:30:39,463 --> 00:30:42,967
And many social animals
employ this strategy.
284
00:30:47,971 --> 00:30:52,267
For the largest population
of wildebeest
in southern Africa,
285
00:30:52,309 --> 00:30:55,020
group security
is a lifesaver.
286
00:31:11,787 --> 00:31:15,207
They congregate
on the Liuwa Plains
in western Zambia
287
00:31:15,248 --> 00:31:20,295
every year during the rains,
attracted by
the abundant grasses.
288
00:31:24,007 --> 00:31:26,927
But carnivores
are ready and waiting,
289
00:31:26,968 --> 00:31:31,681
and the young and helpless
are always
their prime targets.
290
00:31:37,479 --> 00:31:39,481
As a first line of defense,
291
00:31:39,523 --> 00:31:44,069
most wildebeest calves
are born within
a two- or three-week timespan.
292
00:31:45,779 --> 00:31:50,367
This is
an evolutionary strategy
to overwhelm predators.
293
00:31:51,535 --> 00:31:55,539
There are so many, that some
will undoubtedly survive.
294
00:32:04,798 --> 00:32:08,760
This calf stood up on his feet
less than six minutes
after birth.
295
00:32:11,054 --> 00:32:14,391
Now, he’s a month old
with steadier legs
296
00:32:16,893 --> 00:32:19,729
and it’s time
for wildebeest boot camp.
297
00:32:26,027 --> 00:32:30,907
The older males chase him
to sharpen his evasion
and running skills.
298
00:32:39,708 --> 00:32:43,837
It’s valuable training
and could ultimately
save his life.
299
00:32:44,713 --> 00:32:48,634
But right now,
it’s not enough
to keep him safe.
300
00:33:00,562 --> 00:33:05,609
He must avoid getting
separated from his mother,
who’s his main protector.
301
00:33:08,403 --> 00:33:12,991
They recognize each other
by individual smell
and their unique call.
302
00:33:17,829 --> 00:33:21,416
Despite these safeguards,
as the herd moves on,
303
00:33:22,292 --> 00:33:25,128
the little one
has been left behind.
304
00:33:31,885 --> 00:33:35,389
And now,
he’s incredibly vulnerable.
305
00:33:52,614 --> 00:33:56,159
If it wasn’t over
100 degrees Fahrenheit,
306
00:33:56,201 --> 00:33:58,412
the lions would make
quick work of him.
307
00:34:00,914 --> 00:34:03,166
He runs to catch up
to the herd
308
00:34:04,584 --> 00:34:06,878
and finds his mother.
309
00:34:07,504 --> 00:34:09,423
He’s been lucky.
310
00:34:16,596 --> 00:34:21,267
For the wildebeest,
it’s hard enough
to stay safe in the day,
311
00:34:21,309 --> 00:34:24,813
but at night,
the trouble really starts.
312
00:34:31,903 --> 00:34:34,572
They have poor night vision.
313
00:34:35,699 --> 00:34:38,327
But their greatest foe,
hyenas,
314
00:34:38,368 --> 00:34:41,329
can see extremely well
in the dark.
315
00:34:45,417 --> 00:34:47,294
To level the playing field,
316
00:34:47,335 --> 00:34:51,256
the herd has a well-organized
defensive plan.
317
00:35:04,436 --> 00:35:07,356
It forms
a tight protective line,
318
00:35:08,440 --> 00:35:10,359
making it difficult
for the hyenas
319
00:35:10,400 --> 00:35:14,362
to pick out and surround
any one individual.
320
00:35:17,532 --> 00:35:20,452
If a hyena is detected,
321
00:35:20,493 --> 00:35:23,579
loud warning calls
alert the rest of the group.
322
00:35:23,622 --> 00:35:25,415
(WILDEBEEST GRUNTING)
323
00:35:37,344 --> 00:35:40,848
\h\h\h\h\h\h\h\h\h\h\hAnd tonight,
it’s been a winning strategy.
324
00:36:06,373 --> 00:36:09,501
Warning the rest of the group
that danger is near
325
00:36:09,542 --> 00:36:12,336
is a major benefit
of living together.
326
00:36:13,797 --> 00:36:15,716
And there’s one social group
327
00:36:15,757 --> 00:36:19,511
that’s taken
this communication
to another level.
328
00:36:26,393 --> 00:36:29,897
Vervet monkeys live in troops
of around 25.
329
00:36:35,443 --> 00:36:39,322
Only a foot and a half tall
and weighing just 11 pounds,
330
00:36:39,656 --> 00:36:42,909
they’re on the menu for
a whole host of carnivores.
331
00:36:47,497 --> 00:36:51,501
And since they prefer
open ground
to more dense forest,
332
00:36:51,835 --> 00:36:55,589
they’re easier to spot
and pick off.
333
00:36:57,048 --> 00:37:00,552
In response,
they have an impressive
vocal repertoire.
334
00:37:00,969 --> 00:37:03,346
(SHRIEKING)
335
00:37:08,643 --> 00:37:11,563
\h\h\h\h\h\h\h\h\h\hThis call means
danger on the ground,
336
00:37:13,732 --> 00:37:15,776
better flee to the trees.
337
00:37:19,821 --> 00:37:25,118
A shorter, more abrupt cry,
stands for aerial predator
on the prowl
338
00:37:29,998 --> 00:37:32,501
beware of danger from above.
339
00:37:37,464 --> 00:37:40,717
They even have a call
for snake.
340
00:37:45,764 --> 00:37:49,601
Vervets can convey
over 20 different messages
with their calls,
341
00:37:50,185 --> 00:37:52,688
signaling not just
"watch out"
342
00:37:52,729 --> 00:37:55,982
but more specifically
what to watch out for.
343
00:37:59,903 --> 00:38:02,989
Baboons,
their larger primate cousins,
344
00:38:03,031 --> 00:38:05,784
have a less sophisticated
alarm system.
345
00:38:05,825 --> 00:38:07,869
(SHRIEKING)
346
00:38:09,037 --> 00:38:11,581
\h\h\h\h\h\h\h\h\h\hBut combined
with another deterrent,
347
00:38:11,623 --> 00:38:13,542
they’re a formidable force.
348
00:38:15,710 --> 00:38:19,589
They’re larger and up to
10 times heavier than Vervets,
349
00:38:19,631 --> 00:38:23,135
so they can be
more aggressive when
confronted with trouble.
350
00:38:24,886 --> 00:38:28,807
And a male leopard
is most definitely trouble.
351
00:38:30,892 --> 00:38:32,560
(SCREECHING)
352
00:38:34,687 --> 00:38:36,564
\h\h\h\h\h\h\h\h\h\hThe alpha male
notices him first
and raises the alarm.
353
00:38:40,860 --> 00:38:45,656
He’s chief of the troop,
the biggest baboon
with the most lethal canines.
354
00:38:47,242 --> 00:38:51,747
Still, a leopard is more than
a match for him alone.
355
00:38:53,540 --> 00:38:56,501
But he has back up.
(ALL SCREECHING)
356
00:38:57,585 --> 00:39:00,755
\h\h\h\h\h\h\h\h\h\hThe troop bands
together like an army,
357
00:39:00,797 --> 00:39:03,717
and they’re a noisy,
powerful militia.
358
00:39:08,513 --> 00:39:10,849
Even though the leopard
has a full belly,
359
00:39:11,099 --> 00:39:14,853
the baboons are not happy
to have him this close.
360
00:39:16,229 --> 00:39:19,733
The flicking tail means
the leopard isn’t too happy
either.
361
00:39:36,875 --> 00:39:39,795
He starts to move away,
362
00:39:39,836 --> 00:39:42,797
but he’s still too close
for their liking.
363
00:39:47,051 --> 00:39:52,139
As they screech,
they move towards him,
physically shooing him off.
364
00:40:03,943 --> 00:40:06,529
(SCREECHING CONTINUES)
365
00:40:10,074 --> 00:40:13,828
\h\h\h\h\h\h\h\h\h\hThe alpha male
is the most aggressive.
366
00:40:38,811 --> 00:40:41,814
The leopard can’t stand
this barrage any longer.
367
00:40:45,902 --> 00:40:49,656
And the baboon troop
escorts him off the premises.
368
00:40:52,951 --> 00:40:56,872
The alpha baboon
is the undoubted leader,
369
00:40:56,913 --> 00:40:58,832
marching his troop
into battle
370
00:40:58,873 --> 00:41:01,584
against any animals
who threaten them.
371
00:41:06,839 --> 00:41:11,218
But thousands of
red-billed quelea are also
able to evade predation
372
00:41:12,178 --> 00:41:15,223
even though there’s no
frontrunner leading the way.
373
00:41:16,808 --> 00:41:18,893
(ALL CHIRPING)
374
00:41:25,316 --> 00:41:29,070
\h\h\h\h\h\h\h\h\h\hThese murmurations
are a collective movement.
375
00:41:33,282 --> 00:41:37,244
Each bird watches its
closest neighbors carefully.
376
00:42:04,188 --> 00:42:06,607
When one bird spots danger
377
00:42:08,067 --> 00:42:10,570
and changes direction,
378
00:42:12,989 --> 00:42:16,242
its immediate neighbors
respond almost simultaneously,
379
00:42:18,161 --> 00:42:21,122
the effect rippling
through the flock.
380
00:42:26,753 --> 00:42:30,257
Better together,
the young crocodile
goes hungry.
381
00:42:33,843 --> 00:42:37,096
All 100,000 quelea
are safe.
382
00:42:42,894 --> 00:42:46,272
Quelea only have
tiny bird brains,
383
00:42:46,314 --> 00:42:49,901
but together, it’s like
one big collective mind
384
00:42:49,942 --> 00:42:51,986
working in perfect harmony.
385
00:42:54,155 --> 00:42:58,868
Big brains mean animals
can work together
even more effectively.
386
00:42:59,827 --> 00:43:02,872
It also means they can
retain useful information
387
00:43:02,914 --> 00:43:05,208
to pass on to
the rest of their gang,
388
00:43:05,249 --> 00:43:08,127
giving them the extra edge
they need to survive.
389
00:43:14,425 --> 00:43:16,928
Head of the class
is the elephant.
390
00:43:18,346 --> 00:43:21,724
They have the biggest brains
of all land mammals,
391
00:43:21,766 --> 00:43:24,644
weighing in
at over 10 pounds.
392
00:43:25,812 --> 00:43:29,941
Elephants live in herds
of related females,
led by the matriarch,
393
00:43:30,441 --> 00:43:33,945
and are a close-knit group,
staying together for years.
394
00:43:40,034 --> 00:43:43,287
The herd’s well-being
relies totally
on her leadership,
395
00:43:43,996 --> 00:43:46,207
which is where
the big brain
comes in handy.
396
00:43:48,960 --> 00:43:52,839
The part used
for working memory,
the temporal lobe,
397
00:43:52,880 --> 00:43:55,174
is particularly
well developed.
398
00:43:55,216 --> 00:43:57,969
So she can remember
watering holes
399
00:43:58,010 --> 00:44:01,013
and the best places
to find food.
400
00:44:05,101 --> 00:44:08,062
Shown by her own mother
decades ago,
401
00:44:08,104 --> 00:44:11,357
she’s now passing
that knowledge on
to her own offspring.
402
00:44:31,502 --> 00:44:36,424
Learning from your elders
is a major advantage
of living in a group,
403
00:44:36,966 --> 00:44:40,428
knowing how and where to
find things to keep you alive.
404
00:44:42,930 --> 00:44:45,433
But understanding how
to operate within the group
405
00:44:45,474 --> 00:44:48,268
is just as essential
for future survival.
406
00:44:57,612 --> 00:45:01,449
Lionesses have their young
within a few weeks
of one another,
407
00:45:01,490 --> 00:45:04,660
so they can all be raised
together in a creche.
408
00:45:06,078 --> 00:45:10,833
It’s easier to keep an eye
on playful cubs
if they’re all in one place,
409
00:45:11,083 --> 00:45:13,377
and there’s a better chance
of protecting them
410
00:45:13,419 --> 00:45:15,379
should rival males
come close.
411
00:45:18,799 --> 00:45:22,594
But living cheek by jowl has
some surprising consequences.
412
00:45:28,059 --> 00:45:31,563
Females don’t just suckle
their own cubs.
413
00:45:34,482 --> 00:45:37,986
Nieces and nephews
can join in too.
414
00:45:39,278 --> 00:45:41,781
(GROWLING)
415
00:45:42,323 --> 00:45:44,242
NARRATOR:
\hDrinking side by side,
416
00:45:44,283 --> 00:45:46,952
the cubs forge
long-lasting ties
417
00:45:46,994 --> 00:45:50,498
that will help keep
the pride strong
in the future.
418
00:46:02,343 --> 00:46:04,470
At about three years old,
419
00:46:04,512 --> 00:46:09,642
brothers and male cousins
will leave together,
forming a coalition
420
00:46:09,684 --> 00:46:12,729
and eventually taking over
another pride,
421
00:46:12,770 --> 00:46:15,606
just like their fathers
before them.
422
00:46:19,026 --> 00:46:22,530
Sisters and female cousins
will stay.
423
00:46:24,657 --> 00:46:28,035
The relationships they build
will keep them united,
424
00:46:28,077 --> 00:46:32,748
ready to face down anyone
who threatens their own cubs
in the years to come.
425
00:46:46,470 --> 00:46:49,556
To survive in
the African wilderness,
426
00:46:49,598 --> 00:46:52,768
it pays to be
part of a team
427
00:46:52,810 --> 00:46:56,897
to have others
who can help out
when things get tough.
428
00:46:59,275 --> 00:47:02,528
These animals have come up
with different strategies
429
00:47:02,570 --> 00:47:05,990
to make group living
work to their advantage.
430
00:47:08,326 --> 00:47:11,663
Working together,
they are stronger,
431
00:47:13,164 --> 00:47:16,000
better able
to defend their territory,
432
00:47:16,917 --> 00:47:18,919
their young,
433
00:47:19,545 --> 00:47:22,214
and themselves
434
00:47:23,507 --> 00:47:29,054
in the fight to stay alive
in Zambia’s wild places.
435
00:47:32,016 --> 00:47:35,978
(MUSIC PLAYING)
436
00:47:35,978 --> 00:47:37,978
��moov lmvhd
36343
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