﻿1
00:00:32,900 --> 00:00:35,200
A Bengal tiger.

2
00:00:42,700 --> 00:00:45,360
She is looking for prey.

3
00:00:51,300 --> 00:00:53,360
One of these deer, perhaps.

4
00:01:23,760 --> 00:01:25,800
But the slightest sound
from her...

5
00:01:25,800 --> 00:01:27,000
TWIG SNAPS

6
00:01:27,000 --> 00:01:28,600
..could warn them.

7
00:01:34,080 --> 00:01:36,720
DEER CALLING

8
00:01:39,200 --> 00:01:41,760
She will have to try elsewhere.

9
00:01:49,920 --> 00:01:52,080
The forests of the world

10
00:01:52,080 --> 00:01:57,360
are home to two-thirds of all
species of mammals.

11
00:02:06,560 --> 00:02:11,680
For them, it is the most important
habitat of all.

12
00:02:22,240 --> 00:02:24,680
Equatorial Africa.

13
00:02:30,600 --> 00:02:32,640
Chimpanzees.

14
00:02:38,880 --> 00:02:43,400
This young chimp has discovered
a cloud of bees.

15
00:02:43,400 --> 00:02:45,640
They're coming from a hole
in the tree,

16
00:02:45,640 --> 00:02:49,360
and he knows that there could be
something sweet in there.

17
00:02:52,840 --> 00:02:54,480
But it's well defended.

18
00:02:56,480 --> 00:02:58,160
BUZZING

19
00:03:00,760 --> 00:03:05,560
The alpha male knows the kind of bee
that doesn't sting.

20
00:03:12,400 --> 00:03:14,960
But they live underground.

21
00:03:16,120 --> 00:03:19,880
So, to get their honey,
you need a tool.

22
00:03:24,240 --> 00:03:26,720
A straight stick should do the job.

23
00:03:29,040 --> 00:03:31,320
If it's the right length.

24
00:03:58,400 --> 00:04:03,200
A sniff tells him that there is
honey down there somewhere.

25
00:04:08,280 --> 00:04:10,400
Got it.

26
00:04:21,680 --> 00:04:25,720
He found it - and the others
will have to wait.

27
00:04:35,320 --> 00:04:37,400
Mm!

28
00:04:37,400 --> 00:04:39,800
That looks nice.

29
00:04:39,800 --> 00:04:42,640
Is there enough for two, perhaps?

30
00:04:51,040 --> 00:04:53,160
Apparently not.

31
00:04:59,000 --> 00:05:01,600
Perhaps he's left some behind.

32
00:05:06,320 --> 00:05:07,960
No.

33
00:05:12,240 --> 00:05:14,120
BIRDS CHIRP

34
00:05:14,120 --> 00:05:19,080
But up in the trees,
there is more substantial prey.

35
00:05:28,440 --> 00:05:30,920
Red-capped mangabeys.

36
00:05:53,400 --> 00:05:56,600
The alpha male investigates.

37
00:06:12,800 --> 00:06:16,040
Others stay on the ground

38
00:06:16,040 --> 00:06:19,120
and get ahead of the mangabeys.

39
00:06:36,640 --> 00:06:40,680
And then some quietly climb
into the trees.

40
00:07:00,080 --> 00:07:03,440
The trap is set.

41
00:07:25,000 --> 00:07:26,280
LOUD SCREECH

42
00:07:26,280 --> 00:07:27,720
The leader charges.

43
00:07:27,720 --> 00:07:30,160
MANGABEYS CALL

44
00:07:34,360 --> 00:07:37,080
Some hunters return
to the forest floor...

45
00:07:38,920 --> 00:07:42,200
...to prevent their prey from coming
to the ground.

46
00:08:04,120 --> 00:08:07,160
In panic, the monkeys flee
directly towards

47
00:08:07,160 --> 00:08:09,480
the chimps waiting in ambush.

48
00:08:13,640 --> 00:08:15,680
SCREECHING

49
00:08:19,080 --> 00:08:21,160
And are caught.

50
00:08:28,600 --> 00:08:31,480
The chimps, young and old,

51
00:08:31,480 --> 00:08:33,720
females and males,

52
00:08:33,720 --> 00:08:36,480
all share in the feast.

53
00:08:41,240 --> 00:08:45,720
Teamwork has won, and is rewarded.

54
00:09:03,360 --> 00:09:08,520
The forests of Madagascar have
their own special fauna,

55
00:09:08,520 --> 00:09:12,040
and it's unlike any other
in the world.

56
00:09:19,600 --> 00:09:22,680
Among the strangest creatures

57
00:09:22,680 --> 00:09:26,360
are little mammals called tenrecs.

58
00:09:28,040 --> 00:09:30,760
They have poor eyesight,

59
00:09:30,760 --> 00:09:33,200
but a keen sense of smell,

60
00:09:33,200 --> 00:09:35,520
and will eat almost any
small creature

61
00:09:35,520 --> 00:09:37,720
they can find in the leaf litter.

62
00:09:45,840 --> 00:09:50,120
And they manage to find food
almost anywhere.

63
00:10:14,360 --> 00:10:17,280
One of the smaller members
of the family

64
00:10:17,280 --> 00:10:19,920
is having difficulty in keeping up.

65
00:10:28,760 --> 00:10:31,320
And there are dangers around.

66
00:11:02,680 --> 00:11:07,080
The mother realises that one
of her family is missing.

67
00:11:11,480 --> 00:11:15,960
She calls to the wanderer using
a special instrument -

68
00:11:15,960 --> 00:11:18,680
a patch of stiff bristles
on her back

69
00:11:18,680 --> 00:11:20,480
that can be vibrated.

70
00:11:21,720 --> 00:11:23,800
RATTLING

71
00:11:39,400 --> 00:11:43,280
The wanderer recognises the summons

72
00:11:43,280 --> 00:11:44,880
and heads towards it.

73
00:11:50,880 --> 00:11:55,080
But adult and young are separated
by a stream.

74
00:12:00,320 --> 00:12:03,440
It's only a metre or so across,

75
00:12:03,440 --> 00:12:07,560
but that is quite a distance
for a tiny tenrec.

76
00:12:26,320 --> 00:12:31,360
Oddly, perhaps, tenrecs can swim.

77
00:12:57,400 --> 00:13:00,120
Now it'll have to climb.

78
00:13:05,200 --> 00:13:09,200
Strong toes and hooked claws

79
00:13:09,200 --> 00:13:12,560
enable it to cope with
the slippery mud.

80
00:13:18,480 --> 00:13:20,400
Reunited.

81
00:13:34,320 --> 00:13:39,960
Madagascar's rainforests are
tropical, hot and dense.

82
00:13:41,840 --> 00:13:45,640
The forests of North America
are also thick.

83
00:13:47,440 --> 00:13:50,920
But they are very cold indeed.

84
00:13:59,480 --> 00:14:02,240
This is the home
of the forest bobcat.

85
00:14:08,240 --> 00:14:10,560
High in the trees,

86
00:14:10,560 --> 00:14:14,800
a lone female has seen what
she's been waiting for.

87
00:14:17,440 --> 00:14:19,560
The meal that will be essential

88
00:14:19,560 --> 00:14:21,880
if she is to survive
the coming winter.

89
00:14:30,760 --> 00:14:34,480
The streams are full of newcomers.

90
00:14:37,000 --> 00:14:38,560
Salmon.

91
00:14:40,520 --> 00:14:43,360
Having spent years feeding at sea,

92
00:14:43,360 --> 00:14:46,200
they come back here to spawn.

93
00:14:50,320 --> 00:14:53,760
Otters have been waiting for them

94
00:14:53,760 --> 00:14:56,240
and know how to catch them.

95
00:15:11,760 --> 00:15:16,600
But cats don't have thick
waterproof fur, like otters.

96
00:15:22,560 --> 00:15:25,960
And few like getting their feet wet.

97
00:15:35,640 --> 00:15:39,560
She's much more at home on land
than in the water.

98
00:15:44,840 --> 00:15:47,840
A fallen tree across the river
could help.

99
00:15:51,760 --> 00:15:53,400
LOUD SPLASHING

100
00:15:57,080 --> 00:16:00,320
She follows the salmon upstream...

101
00:16:04,000 --> 00:16:07,880
...looking for a place where
they're forced to swim close

102
00:16:07,880 --> 00:16:10,520
to the river bank.

103
00:16:20,160 --> 00:16:24,360
One of these fish could weigh more
than she does.

104
00:16:29,040 --> 00:16:32,080
This is not going to be easy.

105
00:16:44,040 --> 00:16:46,560
It's too big and powerful...

106
00:16:47,720 --> 00:16:52,080
...but these huge fish are
worth fighting for.

107
00:17:07,520 --> 00:17:11,160
She follows the river still
further upstream.

108
00:17:26,600 --> 00:17:28,560
It's now narrower...

109
00:17:28,560 --> 00:17:30,280
..but swifter.

110
00:17:48,120 --> 00:17:50,880
This could be her chance.

111
00:18:24,520 --> 00:18:30,080
This is the first bobcat ever
filmed catching salmon.

112
00:18:39,040 --> 00:18:43,320
It's an extraordinary display
of the determination

113
00:18:43,320 --> 00:18:48,400
that she will need if she is to
survive the cold months ahead.

114
00:18:59,760 --> 00:19:01,880
As temperatures fall,

115
00:19:01,880 --> 00:19:07,320
some forests have become draped
in a thick layer of snow.

116
00:19:13,880 --> 00:19:17,360
Most of the animals that were here
in the summer

117
00:19:17,360 --> 00:19:20,560
have long since retreated south.

118
00:19:23,120 --> 00:19:27,320
Those that remain have to dig
to reach the vegetation

119
00:19:27,320 --> 00:19:29,800
that lies beneath the snow.

120
00:19:32,520 --> 00:19:34,960
But high in the trees,

121
00:19:34,960 --> 00:19:38,720
one mammal gets about without
touching the ground.

122
00:19:47,440 --> 00:19:49,840
A Siberian squirrel.

123
00:19:55,360 --> 00:19:57,280
It...

124
00:19:57,280 --> 00:19:59,280
..can glide.

125
00:20:23,040 --> 00:20:28,120
A furry membrane stretches from
its wrists to its ankles.

126
00:20:32,120 --> 00:20:35,920
There could hardly be a more
efficient way of travelling.

127
00:20:53,880 --> 00:20:55,960
At this time of the year,

128
00:20:55,960 --> 00:20:59,640
the female squirrels are not only
feeding for themselves.

129
00:21:12,000 --> 00:21:16,320
They're also raising families.

130
00:21:21,480 --> 00:21:24,560
A disused woodpecker's nest hole

131
00:21:24,560 --> 00:21:28,600
protects the young squirrels
from the sub-zero temperature.

132
00:21:38,680 --> 00:21:41,400
Their mother's precious milk
must sustain them

133
00:21:41,400 --> 00:21:43,800
throughout the winter.

134
00:21:54,800 --> 00:21:57,000
Five weeks later...

135
00:21:59,080 --> 00:22:03,640
...the warmth of spring has
transformed the forests.

136
00:22:14,640 --> 00:22:19,480
It's time for the young squirrels
to leave the shelter of their nest.

137
00:22:22,280 --> 00:22:25,800
But first flights are
somewhat daunting.

138
00:22:45,000 --> 00:22:48,080
One of the youngsters seems keen.

139
00:22:50,240 --> 00:22:54,040
And one not quite so confident.

140
00:22:54,040 --> 00:22:58,960
The first climbs up the tree,
while the other watches.

141
00:23:00,160 --> 00:23:03,800
The higher up they go,
the further they will glide.

142
00:23:08,400 --> 00:23:09,640
And then...

143
00:23:12,560 --> 00:23:14,320
..lift-off!

144
00:23:18,960 --> 00:23:21,600
Made it.

145
00:23:21,600 --> 00:23:25,480
But the other seems to have
pre-flight nerves.

146
00:23:35,120 --> 00:23:39,080
Perhaps he'll try... tomorrow.

147
00:23:42,960 --> 00:23:46,080
The warm forests of Costa Rica.

148
00:23:47,560 --> 00:23:50,320
One sound rings out in the dawn.

149
00:23:50,320 --> 00:23:53,280
HOWLING ECHOES

150
00:23:55,520 --> 00:24:00,000
It can travel for almost three miles
in every direction.

151
00:24:03,200 --> 00:24:07,360
It's the loudest call made
by any land mammal.

152
00:24:08,960 --> 00:24:10,840
And the singer?

153
00:24:14,960 --> 00:24:17,360
A howler monkey.

154
00:24:18,880 --> 00:24:22,640
A dominant male is proclaiming
his family's occupation

155
00:24:22,640 --> 00:24:25,560
of this particular patch of forest.

156
00:24:41,760 --> 00:24:46,440
They eat fruit, but primarily
they are leaf-eaters,

157
00:24:46,440 --> 00:24:50,720
and they have already stripped
this tree of most of its leaves.

158
00:24:55,200 --> 00:24:57,600
It's time for them to move on.

159
00:24:59,560 --> 00:25:02,800
But they rarely descend
to the ground.

160
00:25:06,360 --> 00:25:09,160
Like many South American monkeys,

161
00:25:09,160 --> 00:25:11,760
they have a grasping tail

162
00:25:11,760 --> 00:25:15,520
that they use, in effect,
as a fifth limb.

163
00:25:21,200 --> 00:25:25,240
With its help, they manage
to bridge great gaps.

164
00:25:39,720 --> 00:25:42,480
Living in such large groups...

165
00:25:44,040 --> 00:25:47,520
..there is always help
for the youngsters.

166
00:25:54,520 --> 00:25:58,320
But sometimes,
when you're 30 metres up,

167
00:25:58,320 --> 00:26:02,720
you have to take a leap of faith.

168
00:26:17,640 --> 00:26:20,440
Once, they could find great areas

169
00:26:20,440 --> 00:26:23,240
of uninterrupted forest canopy.

170
00:26:29,640 --> 00:26:35,880
But today, they have to venture into
towns to find the leaves they need.

171
00:26:41,680 --> 00:26:44,000
The alpha male is the leader.

172
00:26:45,560 --> 00:26:48,040
It's up to him to find food.

173
00:26:51,520 --> 00:26:54,720
This is alien territory.

174
00:27:06,000 --> 00:27:08,200
And up here,

175
00:27:08,200 --> 00:27:10,120
there are dangers.

176
00:27:10,120 --> 00:27:12,000
ELECTRICITY CRACKLES

177
00:27:13,080 --> 00:27:15,480
They don't know exactly
what they are...

178
00:27:30,520 --> 00:27:32,280
..but they follow.

179
00:27:36,080 --> 00:27:37,920
TRAFFIC PASSES

180
00:27:43,760 --> 00:27:47,720
Their grasping tails are
now particularly valuable...

181
00:27:49,680 --> 00:27:52,040
..and reach cables above them.

182
00:27:53,800 --> 00:27:58,120
But if they touch more than one
uninsulated electricity cable...

183
00:28:00,760 --> 00:28:03,040
..the shock will kill them.

184
00:28:23,920 --> 00:28:27,120
ELECTRICITY BUZZES FAINTLY

185
00:28:30,560 --> 00:28:33,000
In the past three years,

186
00:28:33,000 --> 00:28:37,560
nearly 1,000 monkeys have
been electrocuted here.

187
00:28:52,600 --> 00:28:56,080
He keeps a watchful eye
on his family.

188
00:29:29,680 --> 00:29:32,000
Once everyone is safely across,

189
00:29:32,000 --> 00:29:33,960
he follows.

190
00:29:54,240 --> 00:29:59,080
At last, they can all feed.

191
00:30:08,560 --> 00:30:11,560
That is not only essential
for the howlers...

192
00:30:14,840 --> 00:30:18,800
..but also for many of the trees
on which they feed,

193
00:30:18,800 --> 00:30:22,640
which rely on them both for
pollinating the flowers

194
00:30:22,640 --> 00:30:27,360
and for distributing the seeds
that the fruits contain.

195
00:30:30,600 --> 00:30:34,760
It's a partnership,
with rewards for each.

196
00:30:43,800 --> 00:30:46,440
And nowhere is
this interdependence

197
00:30:46,440 --> 00:30:49,360
between plants and mammals
more impressive...

198
00:30:50,880 --> 00:30:53,320
..than here in central Africa.

199
00:30:55,640 --> 00:30:57,560
CHIRPING

200
00:31:01,040 --> 00:31:03,760
These straw-coloured fruit bats

201
00:31:03,760 --> 00:31:07,520
have flown right across
the continent

202
00:31:07,520 --> 00:31:11,120
in order to visit this one small
particular patch

203
00:31:11,120 --> 00:31:13,160
of forest in Zambia.

204
00:31:17,560 --> 00:31:21,400
Bats are the only mammals
that have powered flight.

205
00:31:28,640 --> 00:31:32,480
And this enables them to visit
the Zambian forest

206
00:31:32,480 --> 00:31:36,080
at precisely the time that
fruit trees are ripening.

207
00:31:41,480 --> 00:31:43,800
The roost is a crowded place.

208
00:31:48,440 --> 00:31:52,800
And bats, like all of us,
have things they need to do.

209
00:32:01,400 --> 00:32:03,680
One thing is for certain.

210
00:32:05,000 --> 00:32:08,320
It's better not to be
in the lower branches.

211
00:32:27,200 --> 00:32:30,520
The heat of the day has passed,

212
00:32:30,520 --> 00:32:35,280
and as the light fades,
the bats start to take off.

213
00:32:39,640 --> 00:32:42,280
Guided by their acute sense
of smell,

214
00:32:42,280 --> 00:32:44,720
they head off in search of fruit.

215
00:32:57,720 --> 00:33:05,440
Within just 30 minutes, some
ten million bats take to the air.

216
00:33:12,000 --> 00:33:16,560
This is the largest and densest
concentration of mammals

217
00:33:16,560 --> 00:33:19,560
to be found anywhere
on the planet.

218
00:33:50,040 --> 00:33:55,440
They consume up to 5,000 tonnes
of fruit every night.

219
00:33:57,880 --> 00:34:00,840
And within three short weeks,

220
00:34:00,840 --> 00:34:05,240
they will distribute over
a billion seeds.

221
00:34:05,240 --> 00:34:08,880
Enough to plant an entire forest.

222
00:34:13,960 --> 00:34:19,120
But today, both these bats and
their forest are under threat.

223
00:34:26,200 --> 00:34:29,080
Human beings have claimed the land,

224
00:34:29,080 --> 00:34:33,520
cutting down trees to create farms
and build houses.

225
00:34:40,160 --> 00:34:41,920
THUNDER CRACKS

226
00:34:41,920 --> 00:34:46,040
The delicate natural balance
is at risk.

227
00:34:55,880 --> 00:35:00,480
Without our protection,
the survival of entire forests

228
00:35:00,480 --> 00:35:04,320
and their remarkable inhabitants
are in danger.

229
00:35:18,400 --> 00:35:23,520
But the impact of human activity
is not always so obvious.

230
00:35:26,040 --> 00:35:31,280
In Uganda, the warming of the world
is changing the landscape.

231
00:35:38,360 --> 00:35:40,760
As temperatures rise,

232
00:35:40,760 --> 00:35:44,600
the cactus-like euphorbia trees
are spreading.

233
00:35:47,120 --> 00:35:50,800
And some terrestrial animals
are spreading, too.

234
00:35:57,680 --> 00:36:00,600
Not laterally, but upwards.

235
00:36:02,960 --> 00:36:07,160
This pride of lions is starting
to claim new territory.

236
00:36:09,560 --> 00:36:11,080
FLY BUZZES

237
00:36:14,440 --> 00:36:18,600
In the branches, it can be
several degrees cooler

238
00:36:18,600 --> 00:36:20,720
than at ground level.

239
00:36:26,760 --> 00:36:29,360
It's a nice place to relax...

240
00:36:32,640 --> 00:36:36,400
..if you can find somewhere
comfortable to do so.

241
00:36:36,400 --> 00:36:38,360
PANTING

242
00:36:41,800 --> 00:36:46,120
Lions aren't really suited for life
in the trees...

243
00:36:50,000 --> 00:36:52,920
..and they're still trying to get
accustomed to it.

244
00:37:06,040 --> 00:37:09,520
But there is little point in getting
properly comfortable...

245
00:37:09,520 --> 00:37:11,400
SNORTS

246
00:37:12,720 --> 00:37:15,840
..if there are hungry mouths
to be fed.

247
00:37:23,880 --> 00:37:27,040
The dominant female leads
the pride...

248
00:37:27,040 --> 00:37:28,480
GROWLS PLAYFULLY

249
00:37:28,480 --> 00:37:31,480
..followed closely by the cubs.

250
00:37:57,720 --> 00:38:00,240
But instead of starting to hunt,

251
00:38:00,240 --> 00:38:03,440
these lions behave rather strangely.

252
00:38:09,440 --> 00:38:12,040
They start to climb.

253
00:38:24,280 --> 00:38:26,720
It's not only cooler
in the branches...

254
00:38:31,760 --> 00:38:36,320
..they also get a better view of
what is going on around them.

255
00:38:45,640 --> 00:38:50,840
Up there, their scent is less
noticeable than at ground level.

256
00:38:55,240 --> 00:38:59,400
Their prey seem to forget that
they are even there...

257
00:39:02,640 --> 00:39:06,440
..and stray ever closer
to their tree.

258
00:39:24,600 --> 00:39:29,440
Silently, the adult lions
drop into action.

259
00:39:51,480 --> 00:39:54,560
The cubs watch.

260
00:40:09,320 --> 00:40:13,680
Now patience is all-important.

261
00:40:29,600 --> 00:40:31,680
SNARLING

262
00:40:35,000 --> 00:40:37,800
The cubs can't stop playing.

263
00:40:39,600 --> 00:40:41,840
That is too much.

264
00:40:46,920 --> 00:40:48,160
LOW GRUNT

265
00:40:49,480 --> 00:40:52,640
These youngsters still have
a lot to learn.

266
00:41:09,600 --> 00:41:12,480
The adult lions are also adapting.

267
00:41:26,680 --> 00:41:29,320
Many things are changing.

268
00:41:35,800 --> 00:41:39,360
The future for the hunters
on the savannah

269
00:41:39,360 --> 00:41:42,040
is by no means certain.

270
00:41:55,080 --> 00:41:56,560
India.

271
00:42:00,640 --> 00:42:04,520
Hidden deep in a protected tract
of jungle...

272
00:42:04,520 --> 00:42:05,920
CUB SQUEAKS

273
00:42:05,920 --> 00:42:08,440
..a new generation of tiger cubs

274
00:42:08,440 --> 00:42:11,240
are taking their first steps
into the forest.

275
00:42:21,400 --> 00:42:23,480
SQUEAKY GROWLS

276
00:42:23,480 --> 00:42:27,880
They are healthy and strong,
and growing fast.

277
00:42:33,680 --> 00:42:38,360
Their mother will soon have to go
out into the forest to hunt.

278
00:43:16,000 --> 00:43:18,760
The increasing heat of summer

279
00:43:18,760 --> 00:43:22,120
has already scorched
the trees and shrubs...

280
00:43:23,480 --> 00:43:25,720
..and the jungle is bare.

281
00:43:32,440 --> 00:43:38,040
Many prey animals have left the
forest to look for food elsewhere.

282
00:43:41,240 --> 00:43:45,440
Those that remain are on high alert.

283
00:44:08,880 --> 00:44:11,320
It's increasingly hot.

284
00:44:14,160 --> 00:44:17,640
These deer are cooling off
in a forest lake.

285
00:44:26,840 --> 00:44:31,960
In the water, stealth and camouflage
will be of no help to her.

286
00:44:45,400 --> 00:44:47,720
But she still needs to hunt.

287
00:45:05,920 --> 00:45:09,640
She gets as close as she can
to her prey,

288
00:45:09,640 --> 00:45:13,000
exploiting every last bit of cover.

289
00:45:32,520 --> 00:45:34,560
SQUEALING

290
00:45:48,480 --> 00:45:50,520
She splits the herd.

291
00:45:59,600 --> 00:46:01,480
She may be powerful...

292
00:46:03,000 --> 00:46:07,800
..but chasing prey in deep water
is exhausting.

293
00:46:22,600 --> 00:46:25,720
She selects an individual
near the shore...

294
00:46:27,400 --> 00:46:29,720
..and drives it back into
the forest.

295
00:46:39,240 --> 00:46:43,520
Once on dry land, she can use
all her power and speed.

296
00:47:01,920 --> 00:47:06,000
Within minutes,
the deer is suffocated.

297
00:47:15,920 --> 00:47:20,080
The tiger's great intelligence
and physical skills

298
00:47:20,080 --> 00:47:24,240
make it one of the forest's
most impressive hunters.

299
00:47:29,400 --> 00:47:33,160
If we protect these rich
and diverse forests,

300
00:47:33,160 --> 00:47:36,600
the mammals that live in them
will thrive.

301
00:47:40,560 --> 00:47:44,240
Here in India,
in the space of just 20 years,

302
00:47:44,240 --> 00:47:48,000
the number of Bengal tigers
has doubled.

303
00:47:53,360 --> 00:47:58,040
There are more than 6,000 species
of mammals on Earth.

304
00:47:58,040 --> 00:48:03,120
But their fate lies in the hands
of just one.

305
00:48:04,560 --> 00:48:06,200
Us.

306
00:48:08,840 --> 00:48:11,840
If we make the right decisions,

307
00:48:11,840 --> 00:48:14,440
we can safeguard the future

308
00:48:14,440 --> 00:48:17,080
not just for our fellow mammals...

309
00:48:18,680 --> 00:48:22,600
..but for all life on Earth.

310
00:48:49,360 --> 00:48:51,640
DAVID ATTENBOROUGH:
Over the course of four years,

311
00:48:51,640 --> 00:48:54,760
the Mammals team travelled
across the globe...

312
00:48:55,920 --> 00:48:59,360
..filming in a great variety
of forests.

313
00:49:02,040 --> 00:49:06,120
But one story took them to
an unexpected setting.

314
00:49:07,720 --> 00:49:12,920
In Costa Rica, they found themselves
on the streets of Playa Hermosa.

315
00:49:15,840 --> 00:49:19,080
Despite being one of the most
forested countries,

316
00:49:19,080 --> 00:49:23,360
even here wildlife is competing
for space with humans.

317
00:49:27,960 --> 00:49:33,440
For howlers, living in a fragmented
forest has grave consequences.

318
00:49:33,440 --> 00:49:35,600
Close to the...

319
00:49:35,600 --> 00:49:42,280
The team enlisted the help of local
howler expert Ines Azofeifa Rojas.

320
00:49:42,280 --> 00:49:47,080
The male from troop two
and two males from troop three.

321
00:49:49,000 --> 00:49:51,400
I love the howlers.

322
00:49:51,400 --> 00:49:53,400
They are the gardeners
of the forest.

323
00:49:53,400 --> 00:49:56,760
They teach me how to live
in one environment

324
00:49:56,760 --> 00:49:58,680
and help another species.

325
00:50:01,320 --> 00:50:05,680
Ines has been researching these
howlers for the past seven years,

326
00:50:05,680 --> 00:50:08,440
observing them as they travel
in search of food

327
00:50:08,440 --> 00:50:11,520
through the town that cuts across
their forest.

328
00:50:12,800 --> 00:50:17,600
When the troop is on the move,
just as in the forest,

329
00:50:17,600 --> 00:50:20,360
their instinct is to stay up high.

330
00:50:24,560 --> 00:50:29,000
So when they reach a road,
they use power lines.

331
00:50:35,840 --> 00:50:37,440
One male.

332
00:50:39,080 --> 00:50:42,720
Oh, my God. This is so close
to the electric cable.

333
00:50:45,080 --> 00:50:49,680
If they touch more than one
uninsulated cable at the same time,

334
00:50:49,680 --> 00:50:52,840
they will get a fatal
electric shock.

335
00:50:57,160 --> 00:51:01,800
Each death can have a huge
consequence for the troop,

336
00:51:01,800 --> 00:51:06,000
and Ines has witnessed this
first-hand.

337
00:51:06,000 --> 00:51:08,000
ELECTRICITY BUZZES FAINTLY

338
00:51:10,360 --> 00:51:13,800
When we found an alpha male
in the power lines,

339
00:51:13,800 --> 00:51:18,160
we also lost all the infants
before one year,

340
00:51:18,160 --> 00:51:21,800
because the new alpha male
kill all of these infants

341
00:51:21,800 --> 00:51:23,960
to produce a new generation.

342
00:51:23,960 --> 00:51:25,800
So this is a big problem

343
00:51:25,800 --> 00:51:27,720
because we don't lost just
one individual.

344
00:51:31,120 --> 00:51:35,240
Whilst 80% of howlers
that get electrocuted die...

345
00:51:37,640 --> 00:51:39,360
..some survive.

346
00:51:43,640 --> 00:51:46,000
These are often infants.

347
00:51:51,160 --> 00:51:55,560
Attached to their mothers, they are
protected from a direct shock.

348
00:52:00,640 --> 00:52:02,720
But there is hope.

349
00:52:07,320 --> 00:52:10,760
There are volunteers and
organisations working

350
00:52:10,760 --> 00:52:15,200
across the area to get medical
treatment to those affected.

351
00:52:23,480 --> 00:52:26,880
Ines is part of an online
response team,

352
00:52:26,880 --> 00:52:30,800
on call day or night
to rescue survivors.

353
00:52:30,800 --> 00:52:32,880
Last night, we received a call.

354
00:52:32,880 --> 00:52:35,440
One female was electrocution.

355
00:52:35,440 --> 00:52:38,680
This female have an infant
approximately one year.

356
00:52:38,680 --> 00:52:42,840
And this infant I take to
the rescue centre.

357
00:52:45,640 --> 00:52:50,480
With their help, these individuals
have a chance to survive.

358
00:52:51,560 --> 00:52:54,040
But it's a long road to recovery.

359
00:52:55,440 --> 00:52:59,080
Throughout the region, there are
just a handful of vets

360
00:52:59,080 --> 00:53:02,320
primed to treat electrocution
victims.

361
00:53:02,320 --> 00:53:05,440
Check the mouth, the teeth,
how they're doing.

362
00:53:06,760 --> 00:53:08,680
This is a very big problem

363
00:53:08,680 --> 00:53:11,160
because it's so many of them
getting electrocuted

364
00:53:11,160 --> 00:53:13,560
that we can be working
with one animal

365
00:53:13,560 --> 00:53:16,360
and be receiving an emergency call
right away.

366
00:53:16,360 --> 00:53:18,440
The survival rate is very low.

367
00:53:18,440 --> 00:53:22,440
Maybe 15 to 20% of the patients that
arrive to us after an electrocution,

368
00:53:22,440 --> 00:53:24,320
they actually are able to survive

369
00:53:24,320 --> 00:53:26,880
and be able to be released back
into the wild.

370
00:53:26,880 --> 00:53:29,240
We're going to do all
the regular check-up

371
00:53:29,240 --> 00:53:31,440
that these individuals need.

372
00:53:31,440 --> 00:53:33,160
Check the lungs and the heart.

373
00:53:33,160 --> 00:53:36,120
Mm-hm. Everything sounds good.

374
00:53:36,120 --> 00:53:39,440
She will be with us for at least
three to four years.

375
00:53:39,440 --> 00:53:42,120
During the next year that
she's going to be with us,

376
00:53:42,120 --> 00:53:44,720
she's always going to be
intensive care,

377
00:53:44,720 --> 00:53:48,240
because electrocution can cause
severe injuries months,

378
00:53:48,240 --> 00:53:50,400
even years after the trauma.

379
00:53:50,400 --> 00:53:53,840
Hopefully, she's going to be OK
and be able to be released.

380
00:53:55,600 --> 00:53:59,080
Back in town, Ines has been
identifying hot spots

381
00:53:59,080 --> 00:54:02,720
where most of the electrocutions
are happening.

382
00:54:02,720 --> 00:54:07,640
We can have in one accident more
than one howler electrocute.

383
00:54:07,640 --> 00:54:12,480
We have some spots that maybe
we have five or six individuals

384
00:54:12,480 --> 00:54:14,960
that, in the moment,
in the power line.

385
00:54:18,920 --> 00:54:22,640
There is a solution
that offers safe passage.

386
00:54:24,640 --> 00:54:29,680
Today, the team are putting up
a bridge in a hot spot area,

387
00:54:29,680 --> 00:54:33,680
to give the monkeys an alternative
to the power lines.

388
00:54:41,000 --> 00:54:44,320
So, we have a canopy bridge
that can connect

389
00:54:44,320 --> 00:54:48,520
these parcels of forest and
provide access for more food

390
00:54:48,520 --> 00:54:51,280
and social interaction
for the howlers.

391
00:54:58,400 --> 00:55:01,640
For Ines, it's a nervous wait.

392
00:55:01,640 --> 00:55:03,880
They are so curious.

393
00:55:03,880 --> 00:55:08,160
And the howlers are rethinking
where they can cross.

394
00:55:12,320 --> 00:55:13,480
Come on, guys.

395
00:55:15,360 --> 00:55:17,120
Oh, my God!

396
00:55:21,960 --> 00:55:24,520
Running, running and running!

397
00:55:25,400 --> 00:55:27,000
Take care, little howler.

398
00:55:28,360 --> 00:55:32,600
Several canopy bridges have now been
installed across the town.

399
00:55:34,320 --> 00:55:39,600
Not only has the programme reduced
the electrocutions by 90%,

400
00:55:39,600 --> 00:55:42,720
it has also brought more
connectivity

401
00:55:42,720 --> 00:55:44,560
to this fragmented forest.

402
00:55:46,360 --> 00:55:50,800
When the humans change
the use of land,

403
00:55:50,800 --> 00:55:54,680
we forget that all of this land
that we are using

404
00:55:54,680 --> 00:55:57,600
is the habitat of many
other species.

405
00:55:57,600 --> 00:56:02,160
Ines's determination to help
the howlers has been driven

406
00:56:02,160 --> 00:56:04,680
by reconnecting with the forest.

407
00:56:04,680 --> 00:56:07,880
So, when I began to study
the howlers,

408
00:56:07,880 --> 00:56:11,840
I can connect again

409
00:56:11,840 --> 00:56:14,480
with the rights of the forest

410
00:56:14,480 --> 00:56:17,360
and also with all of the other
species.

411
00:56:17,360 --> 00:56:20,520
So, my message for many people is,

412
00:56:20,520 --> 00:56:24,960
try to reconnect with whatever
species that you want it -

413
00:56:24,960 --> 00:56:27,840
with plants, with trees,
with amphibians -

414
00:56:27,840 --> 00:56:32,840
but try to reconnect
with this same environment

415
00:56:32,840 --> 00:56:37,520
that we share with other species
in the same global planet.

416
00:56:39,320 --> 00:56:44,120
With the knowledge and dedication
of local champions, like Ines,

417
00:56:44,120 --> 00:56:47,600
across the series, the production
team were able to document

418
00:56:47,600 --> 00:56:50,720
extraordinary moments
in the lives of mammals.

419
00:56:53,200 --> 00:56:56,480
As pressure on wildlife increases,

420
00:56:56,480 --> 00:57:00,320
commitment from passionate
individuals on the ground...

421
00:57:00,320 --> 00:57:02,000
Here we've got a wolf.

422
00:57:02,000 --> 00:57:03,360
HE LAUGHS

423
00:57:03,360 --> 00:57:05,120
..does make a difference.

424
00:57:05,120 --> 00:57:07,680
Can't ignore how special
this place is.

425
00:57:07,680 --> 00:57:10,160
If we continue to share knowledge...

426
00:57:10,160 --> 00:57:12,080
Here's where the den is.
Oh, I see.

427
00:57:12,080 --> 00:57:13,760
So, we can connect to that route.

428
00:57:13,760 --> 00:57:16,320
..and protect the environment...

429
00:57:16,320 --> 00:57:20,280
With the education
and working together

430
00:57:20,280 --> 00:57:24,160
for common goals,
then I be very optimistic.

431
00:57:24,160 --> 00:57:26,800
..there can be hope for
the future of all mammals...

432
00:57:26,800 --> 00:57:29,160
Yay!

433
00:57:29,160 --> 00:57:31,280
..including ourselves.

434
00:57:32,840 --> 00:57:35,160
We did it, we did it,
we did it!

435
00:57:35,160 --> 00:57:37,040
LAUGHING: We did it!

