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00:00:03,704 --> 00:00:09,576
There is a place where water has
turned a desert into paradise.
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00:00:15,148 --> 00:00:19,519
Creating an oasis
that shimmers with vivid beauty.
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00:00:23,223 --> 00:00:26,727
Renewed each year
by an ancient river.
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00:00:30,163 --> 00:00:33,667
It is a diverse and
astonishing wilderness.
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00:00:36,303 --> 00:00:39,673
A spectacle like
no other on earth.
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00:00:42,276 --> 00:00:47,214
Where Africa's iconic
animals flourish.
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00:00:47,214 --> 00:00:52,286
Drawn together by water's
life giving force.
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00:00:52,286 --> 00:00:55,856
This is the great
Okavango Delta,
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00:00:55,856 --> 00:00:59,059
lifeblood of the Kalahari.
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00:01:36,530 --> 00:01:40,334
It's mid-winter in the
northern Kalahari,
11
00:01:43,470 --> 00:01:45,639
The peak of the dry season.
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00:01:49,643 --> 00:01:55,816
This arid savanna landscape
receives less than 20 inches
of annual rain.
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00:01:59,386 --> 00:02:04,157
Only the most accomplished dry
land survivors can exist here,
14
00:02:06,927 --> 00:02:14,434
But in the middle of this
ancient desert lies an
unlikely wildlife haven.
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00:02:14,434 --> 00:02:19,773
It's incredible story starts
thousands of miles away.
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00:02:23,610 --> 00:02:28,248
Eight months ago, fed by
the rains in the
Angolan highlands
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00:02:28,248 --> 00:02:32,319
the Okavango river
began to flow southeast.
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00:02:33,754 --> 00:02:37,357
Carrying 35 billion
cubic feet of water,
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00:02:37,357 --> 00:02:41,395
it flows for 990 miles,
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00:02:41,395 --> 00:02:45,565
finally reaching an ancient
floodplain in Botswana.
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00:02:49,903 --> 00:02:57,411
Here it fans out into a
myriad of channels,
streams and lagoons.
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00:02:57,411 --> 00:03:02,849
Gradually spreading to cover
some 9,900 square miles.
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00:03:04,851 --> 00:03:09,456
Bringing relief to the
once scorched earth.
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00:03:09,456 --> 00:03:14,694
And providing an oasis for
thousands of animals.
25
00:03:14,694 --> 00:03:21,034
Their subsistence tied together
by a river that never finds the
ocean.
26
00:03:21,034 --> 00:03:27,240
But transforms one of Africa's
great deserts into a water world
wonderland.
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00:03:30,644 --> 00:03:35,649
The Okavango delta is truly
the Lifeblood of the Kalahari.
28
00:03:51,932 --> 00:03:57,637
Few animals are more at home in
the Okavango delta than the
massive Hippopotamus.
29
00:04:10,984 --> 00:04:14,754
Males can grow up to three tons.
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00:04:18,358 --> 00:04:23,763
They have sharp tusks that
can grow as long as 20 inches
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00:04:23,763 --> 00:04:26,800
contained in powerful jaws.
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00:04:26,800 --> 00:04:28,902
But they are vegetarians
33
00:04:28,902 --> 00:04:32,639
and these canines are used
for territorial fighting.
34
00:04:43,850 --> 00:04:50,123
This combination of power and
weaponry makes them deadly.
35
00:04:50,123 --> 00:04:54,794
Hippos kill more humans in
Africa than any other mammal.
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00:04:56,930 --> 00:05:00,433
Around them,
it's best to beware.
37
00:05:05,539 --> 00:05:08,341
But they have a weakness.
38
00:05:12,145 --> 00:05:14,447
Sensitive skin.
39
00:05:19,920 --> 00:05:24,758
So they spend most of the day
submerged, avoiding the sun.
40
00:05:28,728 --> 00:05:32,766
This young calf will even
suckle below the water.
41
00:05:36,436 --> 00:05:40,807
Bonds between mothers and
daughters can last for years.
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00:05:46,046 --> 00:05:51,518
Waterways and broad grassy
islands are their perfect
natural habitat.
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00:06:00,827 --> 00:06:05,799
Hippos follow regular routes
through the delta's dense
vegetation
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00:06:05,799 --> 00:06:11,538
where swamps are lined by one
of the fastest growing plants
on earth.
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00:06:15,108 --> 00:06:16,910
Papyrus.
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00:06:21,047 --> 00:06:29,155
This giant sedge is the same
plant that the ancient Egyptians
once used to make paper.
47
00:06:29,155 --> 00:06:33,860
The fibrous stems they favored
for their scrolls are so tough
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00:06:33,860 --> 00:06:37,063
they are indigestible to
almost all animals.
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00:06:38,965 --> 00:06:44,104
The plant grows quickly
into dense, almost
impenetrable levees
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00:06:44,104 --> 00:06:48,575
that block the flow of water
into the thirsty surroundings.
51
00:06:53,480 --> 00:06:57,517
But with their huge bulk
and constant aquatic movement
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00:06:57,517 --> 00:07:01,121
hippos carve paths through
the thick papyrus.
53
00:07:02,956 --> 00:07:06,793
Allowing water to flow away
from the swamp's main channels
54
00:07:06,793 --> 00:07:08,895
and feed the land around it.
55
00:07:11,965 --> 00:07:18,438
Making hippos integral animal
architects in the dynamic
Okavango ecosystem.
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00:07:21,641 --> 00:07:27,981
The hippos share their
domain with a multitude
of winged neighbors.
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00:07:27,981 --> 00:07:34,020
The Okavango delta is home
to 482 species of birds,
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00:07:34,020 --> 00:07:37,490
including some 33 water birds.
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00:07:41,094 --> 00:07:44,564
This high density means
that each bird
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00:07:44,564 --> 00:07:49,002
has developed special ways
to avoid conflict for resources.
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00:07:51,271 --> 00:07:54,641
Causing some
remarkable adaptations.
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00:07:54,641 --> 00:07:58,144
Like the aptly named
African spoonbills.
63
00:08:01,081 --> 00:08:06,619
Together they move through the
water, searching for small fish.
64
00:08:09,155 --> 00:08:15,762
Their broad flat beaks
ideally formed to snap-up
unsuspecting prey.
65
00:08:20,800 --> 00:08:25,605
The Open-billed stork has a
very different specialization.
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00:08:25,605 --> 00:08:30,944
Its curved bill has a gap of
just under a quarter of an inch.
67
00:08:33,313 --> 00:08:39,052
This odd shape helps them
grasp and open aquatic snails
and mussels
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00:08:39,052 --> 00:08:41,888
to get to the
tender flesh inside.
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00:08:51,331 --> 00:08:54,033
This adaptation is so successful
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00:08:54,033 --> 00:08:58,271
that the Open-billed is
one of the most common
of African storks.
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00:09:11,284 --> 00:09:15,321
The Black heron's strategy
is more elaborate.
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00:09:19,259 --> 00:09:23,229
The reason for their so-called
sun umbrella wing shaping
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00:09:23,229 --> 00:09:24,964
is still debated.
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00:09:27,834 --> 00:09:32,172
Some suggest it decreases glare
on the water's surface,
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00:09:32,172 --> 00:09:35,642
making it easier to spot prey.
76
00:09:35,642 --> 00:09:40,847
Others argue it creates a
seemingly safe, shady
refuge for fish.
77
00:09:42,682 --> 00:09:45,919
And the trickery goes
a step further.
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00:09:47,187 --> 00:09:50,890
The heron wiggles its
yellow toes in the mud,
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00:09:50,890 --> 00:09:55,061
which may well attract fish
like a bright lure.
80
00:10:14,681 --> 00:10:18,918
Another master stalker of the
Okavango is the Hamerkop,
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00:10:18,918 --> 00:10:21,688
named for its
hammer-shaped head.
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00:10:23,056 --> 00:10:25,358
Although it has a
simpler approach,
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00:10:25,358 --> 00:10:28,027
it is generally an
effective predator.
84
00:10:31,264 --> 00:10:34,000
Its prey of choice is frogs,
85
00:10:34,000 --> 00:10:37,804
but today it's not having
much luck finding them.
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00:10:39,305 --> 00:10:43,243
The resourceful hunter opts
for a different technique:
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00:10:43,243 --> 00:10:46,913
dive bombing off a
well-placed island.
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00:10:49,148 --> 00:10:54,754
The hippo bull doesn't seem
to mind being used as a
hunting platform.
89
00:11:02,061 --> 00:11:05,164
And the Hamerkop's strategy
pays off.
90
00:11:10,036 --> 00:11:14,374
Past his prime and long since
banished from the herd,
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00:11:14,374 --> 00:11:20,513
the old hippo bull now makes
this lonely wallow his home.
92
00:11:20,513 --> 00:11:25,852
Where even the company of
the noisy Hamerkops is
better than none.
93
00:11:32,959 --> 00:11:38,097
Other clever water birds also
employ temporary hippo islands.
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00:11:38,097 --> 00:11:41,534
Like the Okavango's
deep water expert:
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00:11:41,534 --> 00:11:43,303
the African darter.
96
00:11:46,205 --> 00:11:49,442
It has body plumage
that holds water
97
00:11:49,442 --> 00:11:53,379
and heavier bones
than other bird species.
98
00:11:53,379 --> 00:11:56,449
These act like a diver's
weight belt.
99
00:11:56,449 --> 00:12:00,153
Allowing it to dive for more
than a minute and a half,
100
00:12:00,153 --> 00:12:02,155
up to 20 feet deep.
101
00:12:07,360 --> 00:12:12,565
But wet feathers can
reduce body temperatures
to a dangerous level,
102
00:12:12,565 --> 00:12:17,337
forcing darters to dry
themselves in the sun
between dives.
103
00:12:20,173 --> 00:12:25,178
As the winter floods arrive and
flow through the delta's system,
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00:12:25,178 --> 00:12:28,815
they support more than
just aquatic life.
105
00:12:34,120 --> 00:12:40,426
The abundance of water fuels
enough plant growth to feed
Africa's giants.
106
00:12:42,528 --> 00:12:49,469
A five-ton elephant bull needs
around 660 pounds of food a day.
107
00:12:56,342 --> 00:12:59,412
And the delta provides
enough food
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00:12:59,412 --> 00:13:03,049
to support more than a
hundred thousand elephants.
109
00:13:07,420 --> 00:13:13,192
Making it one of the last
strong holds for these
largest of land mammals.
110
00:13:19,132 --> 00:13:22,468
Good news for
the African jacana.
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00:13:27,006 --> 00:13:31,144
It follows in the
elephant's wake,
112
00:13:31,144 --> 00:13:35,214
Snapping up insects
disturbed by the mammoth feet.
113
00:13:38,151 --> 00:13:41,521
Jacanas thrive in the delta.
114
00:13:43,322 --> 00:13:48,628
Their elongated toes easily
hold their small bodies aloft,
115
00:13:48,628 --> 00:13:52,532
allowing them to travel light
on floating islands.
116
00:14:15,655 --> 00:14:21,461
For the jacanas, prime
property must include a
foundation for nests,
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00:14:21,461 --> 00:14:25,898
feeding grounds and
stepping stones across
the surface.
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00:14:31,003 --> 00:14:34,941
For the latter, one plant
fits the bill perfectly.
119
00:14:44,183 --> 00:14:46,219
Water lilies.
120
00:15:00,967 --> 00:15:06,072
Their long stalks have
air canals, keeping the
plant afloat.
121
00:15:10,009 --> 00:15:14,180
Allowing buds to blossom
above the surface.
122
00:15:18,017 --> 00:15:22,421
Around five days later
the stalk retracts in a spiral,
123
00:15:22,421 --> 00:15:25,992
pulling the fertilized bloom
back underwater
124
00:15:25,992 --> 00:15:28,694
where it will develop
into a fruit.
125
00:15:31,564 --> 00:15:36,135
Later erupting with seeds
to be spread by the current.
126
00:15:37,570 --> 00:15:41,407
As the delta's waters
inundate the landscape,
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00:15:41,407 --> 00:15:44,277
lilies abound.
128
00:15:48,247 --> 00:15:50,983
And they are a relished by some.
129
00:15:56,155 --> 00:16:01,360
This elephant isn't going
to let a mouthful of grit
ruin his meal.
130
00:16:10,436 --> 00:16:14,106
A quick rinse and
it's ready to eat.
131
00:16:26,786 --> 00:16:29,288
While the elephants
devour stalks,
132
00:16:29,288 --> 00:16:32,658
the Chacma baboon
is more particular.
133
00:16:36,696 --> 00:16:40,132
He's only after the roots.
134
00:16:48,307 --> 00:16:51,477
Dexterous hands and
opposable thumbs
135
00:16:51,477 --> 00:16:55,681
allow baboons to pick the
juiciest bits of the lilies.
136
00:17:00,119 --> 00:17:04,490
Although they can survive in the
driest corners of the continent,
137
00:17:04,490 --> 00:17:08,261
in the delta Chacma
baboons thrive.
138
00:17:13,132 --> 00:17:15,501
Here their population density
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00:17:15,501 --> 00:17:17,603
is six times as great
140
00:17:17,603 --> 00:17:21,574
as the Chacma baboons living
in the nearby Namib desert.
141
00:17:25,177 --> 00:17:28,681
This family is fifty strong.
142
00:17:28,681 --> 00:17:34,253
Meaning there are always
eyes peeled for predators.
143
00:17:34,253 --> 00:17:38,257
When you're off guard,
strength in numbers is crucial.
144
00:17:45,431 --> 00:17:47,833
Troops have strict hierarchies
145
00:17:47,833 --> 00:17:51,137
determining access to
the best forage.
146
00:17:57,777 --> 00:18:03,149
A flash of razor-sharp
canines is sufficient warning
to back off.
147
00:18:11,691 --> 00:18:15,461
Babies ride jockey-style
on their mothers' backs
148
00:18:15,461 --> 00:18:18,230
from between six and
twelve weeks old.
149
00:18:24,236 --> 00:18:28,841
Baboons have
incredibly varied diets.
150
00:18:28,841 --> 00:18:33,179
Eating everything from
grasses and fruit to insects
151
00:18:33,179 --> 00:18:34,647
and on the rare occasion
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00:18:34,647 --> 00:18:36,515
even small antelope.
153
00:18:46,559 --> 00:18:51,497
But, for now, these youngsters
are too distracted to eat.
154
00:19:04,810 --> 00:19:10,249
Troops can cover up to 9 miles
a day while foraging.
155
00:19:10,249 --> 00:19:17,289
Their long arms allow for
efficient movement and
foraging on the ground.
156
00:19:17,289 --> 00:19:22,795
All of these factors have made
baboons one of the most
successful primates in Africa.
157
00:19:31,303 --> 00:19:34,707
But the floods also
bring danger.
158
00:19:34,707 --> 00:19:37,276
Water levels restrict movement,
159
00:19:37,276 --> 00:19:42,848
forcing them to travel along
predictable routes on their
daily journeys.
160
00:19:42,848 --> 00:19:45,818
And they're not the only ones
using these routes.
161
00:19:56,429 --> 00:19:58,898
With its abundance
of animal life,
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00:19:58,898 --> 00:20:02,735
the Delta is home
to many predators.
163
00:20:08,674 --> 00:20:13,312
And none is more dangerous
to baboons than the Leopard.
164
00:20:21,854 --> 00:20:24,523
Weighing about 130 pounds,
165
00:20:24,523 --> 00:20:29,462
his short, powerful legs
keep him low to the ground.
166
00:20:29,462 --> 00:20:33,632
Where he is camouflaged
against the delta's long grass.
167
00:20:35,034 --> 00:20:37,903
This male patrols his territory,
168
00:20:37,903 --> 00:20:43,375
which can cover just
under 250 square miles.
169
00:20:43,375 --> 00:20:46,645
He has unique markings
of black dots
170
00:20:46,645 --> 00:20:52,852
and roughly broken circles
called rosettes that take
infinite forms.
171
00:20:52,852 --> 00:20:55,955
Meaning no two leopards
are alike.
172
00:20:57,990 --> 00:21:03,095
Leopards are the most
wide-spread of all wild
African cats,
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00:21:03,095 --> 00:21:06,298
occurring across the continent.
174
00:21:11,003 --> 00:21:17,376
Solitary and secretive,
adults associate only for
long enough to mate.
175
00:21:19,712 --> 00:21:24,917
This male scent-marks
his territory fastidiously.
176
00:21:24,917 --> 00:21:30,789
A warning to other males, and
an advertisement to any females
in the area.
177
00:21:32,958 --> 00:21:35,361
Being more active at night,
178
00:21:35,361 --> 00:21:41,500
he may travel as far as 15 miles
under the cover of darkness.
179
00:21:41,500 --> 00:21:48,073
The arrival of the floods
ensures a variety of small
herbivores in his territory.
180
00:21:48,073 --> 00:21:51,710
As long as they remain fed,
so will he.
181
00:22:01,086 --> 00:22:05,891
The delta is the lifeblood for
carnivore and herbivore alike,
182
00:22:05,891 --> 00:22:08,327
providing food in abundance.
183
00:22:09,828 --> 00:22:13,933
And the African buffalo
prefers an early breakfast.
184
00:22:15,401 --> 00:22:19,371
This gregarious grazer
thrives in the Okavango.
185
00:22:24,176 --> 00:22:28,013
They are some of the heavier
Okavango inhabitants,
186
00:22:28,013 --> 00:22:31,717
weighing as much as 1700 pounds.
187
00:22:31,717 --> 00:22:34,753
And have developed
symbiotic relationships
188
00:22:34,753 --> 00:22:38,123
with birds like oxpeckers
and cattle egrets,
189
00:22:38,123 --> 00:22:42,761
which exchange a cleaning
service for meals of ticks.
190
00:22:47,066 --> 00:22:50,769
The buffalo drinks at least
once a day
191
00:22:50,769 --> 00:22:55,374
but there is an animal here that
has a greater need for water
192
00:22:59,211 --> 00:23:01,547
Red lechwe.
193
00:23:08,721 --> 00:23:12,992
They are among the most water
dependent of all antelopes.
194
00:23:15,194 --> 00:23:18,063
Locally common to the Okavango,
195
00:23:18,063 --> 00:23:23,035
they thrive on new growth along
the margins of floodplains.
196
00:23:26,672 --> 00:23:29,875
To make the most of
this feeding niche,
197
00:23:29,875 --> 00:23:34,513
lechwe follow the water's
seasonal advance and retreat.
198
00:23:38,217 --> 00:23:42,588
But the lechwe needs the delta
for more than just food.
199
00:23:58,203 --> 00:24:01,974
When threatened,
they head for water.
200
00:24:07,980 --> 00:24:14,486
Powerful legs and a leaping gate
enable them to travel quickly
across the floodplains,
201
00:24:16,955 --> 00:24:20,059
where they are safe
from most predators.
202
00:24:20,059 --> 00:24:22,127
But not all.
203
00:24:24,530 --> 00:24:29,601
The depths hold one of
the delta's most
successful predators.
204
00:24:29,601 --> 00:24:32,171
The Nile crocodile.
205
00:24:32,171 --> 00:24:36,675
Large specimens can grow
to 15 feet long
206
00:24:36,675 --> 00:24:38,844
and weigh more than a ton.
207
00:24:41,080 --> 00:24:44,616
With eyes and nostrils
on top of their heads,
208
00:24:44,616 --> 00:24:49,054
they are well adapted for ambush
tactics beneath the surface.
209
00:24:51,290 --> 00:24:55,227
They hunt for mainly fish
and large mammals.
210
00:24:57,730 --> 00:25:00,232
The lechwe would make
an excellent meal.
211
00:25:00,232 --> 00:25:05,738
But on dry land the crocodile
stands no chance of catching
them.
212
00:25:09,074 --> 00:25:14,580
There are other more substantial
options on the reptilian
hunter's menu.
213
00:25:17,149 --> 00:25:21,320
Waterbuck are twice
the lechwe's size.
214
00:25:21,320 --> 00:25:26,058
Males weigh in at
around 500 pounds
215
00:25:26,058 --> 00:25:29,094
and sport
impressive curved horns,
216
00:25:29,094 --> 00:25:32,264
which can reach lengths of
up to three feet.
217
00:25:34,900 --> 00:25:41,173
These handsome antelope need
to drink several times a day
to avoid dehydration.
218
00:25:49,782 --> 00:25:54,086
Unlike the lechwe, they prefer
dry grassland for grazing.
219
00:25:56,321 --> 00:26:01,627
And retreat to the cover of
vegetation when threatened.
220
00:26:01,627 --> 00:26:07,900
This combination of factors
makes viable territories hard
to come by.
221
00:26:07,900 --> 00:26:12,404
But the delta provides
for all their needs.
222
00:26:12,404 --> 00:26:18,110
A breeding male will sometimes
tolerate the presence of a
younger bachelor,
223
00:26:18,110 --> 00:26:22,047
as long as he doesn't attempt
to mate with any females.
224
00:26:25,083 --> 00:26:29,321
But at around six years the
younger male thinks he is ready
225
00:26:29,321 --> 00:26:31,356
to challenge for dominance.
226
00:26:35,294 --> 00:26:38,764
A challenge that is
quickly dispatched with.
227
00:26:44,670 --> 00:26:49,107
Baboon troops are also
governed by strength.
228
00:26:49,107 --> 00:26:52,678
And this alpha male has
won the right to breed.
229
00:26:53,812 --> 00:26:57,850
Mating is often a public affair.
230
00:26:57,850 --> 00:27:02,020
Accompanied by a tell-tale call.
231
00:27:02,020 --> 00:27:07,292
If the female conceives, the
troop will have a new member
in six months.
232
00:27:09,194 --> 00:27:12,631
Copulation is often followed
by grooming.
233
00:27:14,066 --> 00:27:17,369
A crucial tool in maintaining
group cohesion.
234
00:27:17,369 --> 00:27:21,039
And cementing relationships
between troop members.
235
00:27:25,811 --> 00:27:29,982
While some species rely
directly on the delta's waters,
236
00:27:29,982 --> 00:27:34,686
this Greater kudu herd
have a less direct dependence.
237
00:27:38,924 --> 00:27:40,993
Although they need to drink,
238
00:27:40,993 --> 00:27:46,431
kudu can go for longer periods
without water than lechwe and
Waterbuck.
239
00:27:48,367 --> 00:27:52,871
For them the delta's
dense vegetation is key;
240
00:27:52,871 --> 00:27:58,510
providing both sustenance
and cover from predators.
241
00:27:58,510 --> 00:28:03,115
Making the Okavango islands
excellent habitat for the kudu.
242
00:28:12,791 --> 00:28:18,130
This bull is fully mature,
with an impressive set of horns.
243
00:28:21,900 --> 00:28:26,138
Growing up to 6 feet,
244
00:28:26,138 --> 00:28:29,741
they are longest horns
of any antelope.
245
00:28:30,809 --> 00:28:33,946
While kudu aren't territorial,
246
00:28:33,946 --> 00:28:37,349
he has something here
worth fighting for.
247
00:28:38,917 --> 00:28:40,786
A cow.
248
00:28:49,861 --> 00:28:54,499
Kudu are seasonal breeders and
with the delta in full flood,
249
00:28:54,499 --> 00:28:57,302
now is the time for this pair.
250
00:29:16,455 --> 00:29:23,128
But for elephants, reproduction
can be an altogether more
dramatic affair
251
00:29:25,430 --> 00:29:30,369
African elephants live in
breeding herds of related cows,
252
00:29:30,369 --> 00:29:34,172
led by a matriarch.
253
00:29:34,172 --> 00:29:40,312
But there is a large bull in
this herd, attracted by a cow
in estrus.
254
00:29:42,514 --> 00:29:45,350
He's not the only male around,
255
00:29:45,350 --> 00:29:49,521
and another bull attempts to
impose himself on the young cow.
256
00:29:54,159 --> 00:30:00,265
Scenes like this are not
uncommon and cows often escape.
257
00:30:00,265 --> 00:30:04,503
The chase ends only if
the bull can catch her.
258
00:30:19,985 --> 00:30:24,222
But the larger bull will not
tolerate this kind of behavior
259
00:30:24,222 --> 00:30:27,526
emitting deep rumbles
in warning.
260
00:30:52,617 --> 00:30:55,954
He drives off the rogue.
261
00:31:06,064 --> 00:31:11,603
After the drama, the herd heads
off for a cool, calming drink.
262
00:31:19,578 --> 00:31:24,149
And what better for an
African elephant after
quenching its thirst
263
00:31:24,149 --> 00:31:25,984
than a wallow in the mud.
264
00:31:46,471 --> 00:31:52,511
The mud helps cool the
elephants, and protects their
skin from the harsh African sun.
265
00:31:55,280 --> 00:31:58,383
It also acts as a
pest deterrent.
266
00:32:05,624 --> 00:32:09,694
After coating themselves
elephants will scratch off
the thick layer,
267
00:32:09,694 --> 00:32:12,063
removing parasites with it.
268
00:32:28,480 --> 00:32:33,418
Having utilized the abundance of
water and mud here in the delta,
269
00:32:33,418 --> 00:32:38,490
the herd is well equipped
to continue its day.
270
00:32:38,490 --> 00:32:43,495
Elephants aren't the
only ones enjoying the
Okavango's masses of mud.
271
00:32:51,570 --> 00:32:54,739
Warthogs love a good mud bath.
272
00:33:03,381 --> 00:33:09,354
These are the only pigs adapted
to grazing in a savanna habitat.
273
00:33:09,354 --> 00:33:13,024
But they don't have the
elephants' advantage of
a long trunk.
274
00:33:14,492 --> 00:33:18,063
Kneeling allows them access
to short grass.
275
00:33:20,332 --> 00:33:24,603
Like the elephants they
also have ivory tusks.
276
00:33:25,837 --> 00:33:29,207
Growing to as long as 23 inches,
277
00:33:29,207 --> 00:33:32,611
they're used largely in fights
with other warthogs.
278
00:33:36,715 --> 00:33:44,623
The thick, protruding lumps of
skin below the eye protect the
hogs from serious harm.
279
00:33:44,623 --> 00:33:49,327
But it is the shorter lower
tusks which inflict the
real damage.
280
00:33:51,329 --> 00:33:56,434
They grind against the
upper tusks to form a
razor sharp point.
281
00:33:58,737 --> 00:34:04,242
Used to slash and stab in
self-defense against predators.
282
00:34:07,545 --> 00:34:12,717
But even the toughest quarry
may fall prey to an experienced
killer.
283
00:34:20,525 --> 00:34:24,095
An adult warthog met
its demise overnight.
284
00:34:28,333 --> 00:34:35,774
Leopards will catch and kill
almost anything including
reptiles, birds and fish.
285
00:34:43,148 --> 00:34:48,687
But they prey mainly on
mammals, suffocated with
a strangling bite.
286
00:34:53,758 --> 00:34:58,263
A full grown warthog weighs
around 140 pounds.
287
00:35:00,231 --> 00:35:02,734
A big meal for the leopard.
288
00:35:08,907 --> 00:35:14,279
He may return to feed on
the same carcass for days,
289
00:35:14,279 --> 00:35:19,517
stashing it in the safety
of a tree, out of the reach
of scavengers.
290
00:35:22,554 --> 00:35:28,693
But for now, well fed and
content, relaxation is the
order of the day.
291
00:35:36,468 --> 00:35:42,540
While predators like the leopard
and crocodile thrive on land and
in water,
292
00:35:42,540 --> 00:35:47,712
another formidable creature
dominates the delta's skies.
293
00:35:51,516 --> 00:35:54,686
The majestic African fish eagle.
294
00:36:04,496 --> 00:36:09,734
The Okavango delta's swamps,
channels and lagoons
295
00:36:09,734 --> 00:36:14,773
provide habitats for more fish
eagles than anywhere else on
the continent.
296
00:36:32,857 --> 00:36:36,628
These powerful eagles
hunt from elevation,
297
00:36:36,628 --> 00:36:41,433
swooping down to nab fish as
heavy as six and a half pounds.
298
00:36:43,768 --> 00:36:46,971
Yet despite their
reputation for fishing,
299
00:36:46,971 --> 00:36:50,408
these raptors are known thieves,
300
00:36:50,408 --> 00:36:55,780
stealing fish from birds
including kingfishers
and Saddle-billed storks.
301
00:36:59,784 --> 00:37:04,289
But the Saddle-billed stork
is an unlikely victim.
302
00:37:04,289 --> 00:37:08,726
As it towers over the eagles
at five feet tall,
303
00:37:08,726 --> 00:37:13,364
and weighs up to 15 pounds.
304
00:37:13,364 --> 00:37:18,570
Like the fish eagles,
Saddle-bills form
monogamous breeding pairs.
305
00:37:23,475 --> 00:37:25,777
But they are relatively scarce,
306
00:37:25,777 --> 00:37:31,816
with only one pair per 38
square miles in the delta.
307
00:37:31,816 --> 00:37:36,454
They use their colorful bills
to spear and grasp prey,
308
00:37:36,454 --> 00:37:38,990
easily seen in
the shallow pools.
309
00:37:40,692 --> 00:37:43,628
This fish is a substantial meal.
310
00:37:46,030 --> 00:37:48,733
But swallowing it
presents it a challenge.
311
00:37:53,037 --> 00:37:57,408
The stork's struggle has caught
the attention of the fish eagle.
312
00:37:59,644 --> 00:38:02,013
But he arrives too late.
313
00:38:06,584 --> 00:38:10,088
Having missed out on stealing
a meal from the stork,
314
00:38:10,088 --> 00:38:13,057
the eagle finds easier pickings
315
00:38:13,057 --> 00:38:18,963
in the form of a large nest
of young Red-billed buffalo
weavers.
316
00:38:18,963 --> 00:38:24,302
The baby birds are a valuable
source of extra protein for the
raptor.
317
00:38:28,506 --> 00:38:33,311
For the fish eagle, its early
years of life can be tough.
318
00:38:40,151 --> 00:38:45,957
It takes up to five years for
the birds to gain their adult
plumage.
319
00:38:45,957 --> 00:38:52,397
Until then their youth is
betrayed by motley speckles
and grey facial skin.
320
00:38:54,432 --> 00:38:56,501
Driven from their early homes,
321
00:38:56,501 --> 00:39:01,172
the juveniles are forced
to lead a nomadic existence,
322
00:39:01,172 --> 00:39:07,445
Roaming between areas not
already under the control of
territorial adults.
323
00:39:09,514 --> 00:39:13,918
These unclaimed areas can be few
and far between,
324
00:39:13,918 --> 00:39:16,421
resulting in congregations
of youngsters.
325
00:39:20,658 --> 00:39:25,763
In the fifth year of life
facial skin yellows.
326
00:39:25,763 --> 00:39:29,767
But remaining breast speckles
still have to give way
327
00:39:29,767 --> 00:39:35,073
before they are ready to
compete with other adults
for riverside real estate.
328
00:39:37,075 --> 00:39:41,579
While the young fish eagles
are just starting out in life,
329
00:39:41,579 --> 00:39:46,084
this old buffalo bull is
in his twilight years.
330
00:39:55,059 --> 00:40:00,598
Unable to compete with
younger, fitter males for
dominance within a herd,
331
00:40:00,598 --> 00:40:02,767
he has been exiled.
332
00:40:11,809 --> 00:40:16,114
As buffalos get older they
lose the hair on their sides,
333
00:40:16,114 --> 00:40:20,051
and his hairless flank
reveals his advanced age.
334
00:40:27,692 --> 00:40:33,264
Life in the delta means crossing
channels like these regularly.
335
00:40:33,264 --> 00:40:39,570
And the buffalo has learnt to
be wary of what lurks beneath
the surface.
336
00:40:43,274 --> 00:40:48,212
But a juvenile crocodile is
far too small to pose a threat.
337
00:40:50,948 --> 00:40:56,854
His bulk makes him immune to all
except the largest predators
338
00:40:56,854 --> 00:41:01,826
free to live out his last few
seasons in wandering solitude.
339
00:41:17,575 --> 00:41:20,211
Meanwhile not far upstream,
340
00:41:20,211 --> 00:41:25,550
another old bull is using
his most remarkable attribute:
341
00:41:25,550 --> 00:41:26,984
his trunk.
342
00:41:31,255 --> 00:41:37,328
Elephants have the most
inclusive diet of any herbivore.
343
00:41:37,328 --> 00:41:42,667
Even the incredibly fibrous
papyrus isn't inedible to him.
344
00:42:25,710 --> 00:42:31,682
He uses his powerful yet
dexterous trunk, made up of
more than 50,000 muscles
345
00:42:31,682 --> 00:42:34,318
to choose the tastiest leaves.
346
00:42:38,189 --> 00:42:40,925
To power such massive bodies,
347
00:42:40,925 --> 00:42:45,229
elephants must spend
up to 16 hours a day feeding.
348
00:42:51,969 --> 00:42:55,206
Working their trunks
almost endlessly.
349
00:43:07,752 --> 00:43:13,891
Elephants are the ultimate
combination of dexterity
and strength.
350
00:43:13,891 --> 00:43:17,195
A fitting icon for the
great Okavango.
351
00:44:03,007 --> 00:44:05,142
In the coming months,
352
00:44:05,142 --> 00:44:11,182
these strong flowing channels
will dry to a trickle as the
floods recede.
353
00:44:18,923 --> 00:44:24,128
The great herds will move off
to other grazing further afield.
354
00:44:28,165 --> 00:44:34,071
But the cycle will continue as
rain falls on distant mountains,
355
00:44:38,276 --> 00:44:42,480
And the mighty Okavango river
arrives once more
356
00:44:42,480 --> 00:44:47,051
to cast precious water
across the vast Kalahari.
357
00:45:03,501 --> 00:45:06,904
For the animals of
the Okavango Delta,
358
00:45:06,904 --> 00:45:11,175
life is contingent on one
of nature's great anomalies
359
00:45:13,144 --> 00:45:18,916
A river that flows from distant
highland into the middle of a
desert.
360
00:45:24,255 --> 00:45:27,191
Fuelling growth in profusion
361
00:45:27,191 --> 00:45:30,261
and supporting
all manner of life.
362
00:45:34,799 --> 00:45:39,003
For as long as the mighty
Okavango river flows,
363
00:45:39,003 --> 00:45:44,475
this wonderland of abundant life
and variety will persist.
364
00:45:46,510 --> 00:45:51,515
Remaining the lifeblood
of the Kalahari.
365
00:45:53,284 --> 00:46:03,327
(♪♪♪)
366
00:46:03,327 --> 00:46:08,299
(♪♪♪)
367
00:46:08,299 --> 00:46:15,306
(♪♪♪)
32620
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