1 00:00:02,000 --> 00:00:05,540 The animal world is full of spectacle and wonder. 2 00:00:07,300 --> 00:00:10,260 But what's it like to be right in the heart of the action? 3 00:00:12,340 --> 00:00:16,220 To find out, our team of spy creatures goes undercover. 4 00:00:18,660 --> 00:00:21,980 They not only look like the animals they film... 5 00:00:23,060 --> 00:00:24,860 ..they behave like them, too. 6 00:00:30,100 --> 00:00:32,940 Armed with the latest camera technology... 7 00:00:35,460 --> 00:00:37,900 ..they are heading across the globe. 8 00:00:43,780 --> 00:00:46,620 From the heat of the tropics... 9 00:00:48,700 --> 00:00:50,500 ..to the lands that lie in the north. 10 00:00:54,620 --> 00:00:57,380 From the islands of the Southern Seas... 11 00:01:00,660 --> 00:01:03,460 ..to the snow and ice of the frozen poles... 12 00:01:06,060 --> 00:01:12,220 ..our spies reveal the astonishing variety of life that thrives there 13 00:01:12,220 --> 00:01:14,180 from inside their world. 14 00:01:26,500 --> 00:01:29,340 On this assignment, our spy creatures 15 00:01:29,340 --> 00:01:34,020 reveal how life thrives on the islands of the Southern Hemisphere. 16 00:01:35,380 --> 00:01:37,020 Far from the mainland, 17 00:01:37,020 --> 00:01:38,460 these isolated places 18 00:01:38,460 --> 00:01:42,060 have given rise to some of the most unique animals on Earth. 19 00:01:45,180 --> 00:01:48,260 The Galapagos Islands of the Pacific Ocean. 20 00:01:49,580 --> 00:01:51,460 A barren archipelago 21 00:01:51,460 --> 00:01:53,060 formed by underwater volcanoes 22 00:01:53,060 --> 00:01:54,820 over three million years ago. 23 00:01:57,740 --> 00:01:59,980 This landscape of lava is home 24 00:01:59,980 --> 00:02:01,580 to a remarkable fauna 25 00:02:01,580 --> 00:02:03,620 found nowhere else in the world. 26 00:02:09,100 --> 00:02:10,940 One of the most intriguing 27 00:02:10,940 --> 00:02:12,700 is the marine iguana. 28 00:02:18,300 --> 00:02:20,260 Before they can become active, 29 00:02:20,260 --> 00:02:22,100 these cold-blooded lizards 30 00:02:22,100 --> 00:02:23,540 must bask in the sun. 31 00:02:26,140 --> 00:02:28,780 Their black skin absorbs the heat, 32 00:02:28,780 --> 00:02:30,420 raising their core temperature 33 00:02:30,420 --> 00:02:32,220 to a toasty 40 degrees. 34 00:02:36,460 --> 00:02:39,300 To film these highly protected animals, 35 00:02:39,300 --> 00:02:41,860 Spy Iguana has special permission 36 00:02:41,860 --> 00:02:44,660 to go closer than any human is allowed. 37 00:02:53,220 --> 00:02:56,020 To succeed, it has to be totally convincing. 38 00:03:02,340 --> 00:03:04,180 Once they are hot enough, 39 00:03:04,180 --> 00:03:05,580 they start to move. 40 00:03:11,060 --> 00:03:12,500 Spy Iguana 41 00:03:12,500 --> 00:03:15,140 now witnesses something remarkable. 42 00:03:23,420 --> 00:03:25,420 Cliff jumping for lizards. 43 00:03:37,140 --> 00:03:38,660 They are after the seaweed 44 00:03:38,660 --> 00:03:40,300 that flourishes just off shore. 45 00:03:49,180 --> 00:03:50,940 They're on borrowed time. 46 00:03:50,940 --> 00:03:52,300 The water's cold. 47 00:03:52,300 --> 00:03:53,580 And in less than an hour, 48 00:03:53,580 --> 00:03:55,420 their body temperature will halve 49 00:03:55,420 --> 00:03:57,380 and they'll have to return. 50 00:04:05,100 --> 00:04:07,820 Now, another spy takes over. 51 00:04:15,260 --> 00:04:17,500 Lava Cam can track the iguanas 52 00:04:17,500 --> 00:04:18,860 wherever they go. 53 00:04:26,020 --> 00:04:27,660 At this time of year, the females 54 00:04:27,660 --> 00:04:29,460 are laying their eggs on the beach. 55 00:04:36,300 --> 00:04:38,420 The sand is baking hard, 56 00:04:38,420 --> 00:04:39,900 but a metre down 57 00:04:39,900 --> 00:04:42,260 it's the perfect temperature for incubation. 58 00:04:43,700 --> 00:04:45,300 Spy Iguana joins them 59 00:04:45,300 --> 00:04:46,700 for a closer look. 60 00:04:50,060 --> 00:04:52,420 Digging the nest can take an hour. 61 00:04:52,420 --> 00:04:54,020 Hard work in the hot sun. 62 00:05:00,020 --> 00:05:01,780 When they take a break, 63 00:05:01,780 --> 00:05:03,380 they have a self-styled sun hat. 64 00:05:13,740 --> 00:05:14,780 Even our spy. 65 00:05:21,300 --> 00:05:24,500 Competition for the best nest sites is intense. 66 00:05:28,180 --> 00:05:31,620 Those digging must be prepared to hold their ground. 67 00:05:33,340 --> 00:05:36,100 Head bobbing is a challenge for ownership. 68 00:05:41,060 --> 00:05:42,580 The winner is decided 69 00:05:42,580 --> 00:05:43,820 by a test of strength. 70 00:06:13,780 --> 00:06:15,180 The owner wins. 71 00:06:21,420 --> 00:06:22,980 She's free to finish her work. 72 00:06:29,220 --> 00:06:30,580 Along the tide line, 73 00:06:30,580 --> 00:06:31,820 the others are returning 74 00:06:31,820 --> 00:06:33,380 from their underwater feast. 75 00:06:40,380 --> 00:06:42,700 Chilled through by the cold sea, 76 00:06:42,700 --> 00:06:44,540 they must sunbathe once more. 77 00:06:47,300 --> 00:06:49,820 As Spy Iguana joins them, 78 00:06:49,820 --> 00:06:51,860 another surprise is in store. 79 00:06:54,500 --> 00:06:56,140 They sneeze snot. 80 00:06:58,980 --> 00:07:01,100 Special glands in their nose 81 00:07:01,100 --> 00:07:02,820 remove excess salt, 82 00:07:02,820 --> 00:07:05,060 which is expelled spectacularly. 83 00:07:07,260 --> 00:07:08,500 Whatever they can do, 84 00:07:08,500 --> 00:07:10,300 our spies can do, too. 85 00:07:18,820 --> 00:07:20,900 Oh...perhaps not. 86 00:07:23,540 --> 00:07:25,620 As the day ends, 87 00:07:25,620 --> 00:07:27,820 iguanas show their more affectionate side. 88 00:07:30,940 --> 00:07:33,260 Even our spy has an admirer. 89 00:07:39,420 --> 00:07:41,020 Snuggling together 90 00:07:41,020 --> 00:07:42,420 preserves precious warmth, 91 00:07:42,420 --> 00:07:44,260 as the sun sets 92 00:07:44,260 --> 00:07:46,300 over the Galapagos Islands. 93 00:07:51,140 --> 00:07:52,700 Over 8,000 miles away, 94 00:07:52,700 --> 00:07:55,460 off the southern coast of Australia, 95 00:07:55,460 --> 00:07:58,900 Kangaroo Island is another unique wildlife haven. 96 00:08:01,660 --> 00:08:03,180 Cut off from the mainland 97 00:08:03,180 --> 00:08:05,220 for 10,000 years, 98 00:08:05,220 --> 00:08:08,020 it even has its own variety of kangaroo. 99 00:08:14,540 --> 00:08:16,780 Koalas are here, too. 100 00:08:16,780 --> 00:08:19,620 But they are relative newcomers. 101 00:08:19,620 --> 00:08:22,660 Introduced here 100 years ago, 102 00:08:22,660 --> 00:08:23,860 they now survive 103 00:08:23,860 --> 00:08:25,540 in unrivalled numbers. 104 00:08:28,340 --> 00:08:31,380 Among them is a new koala, 105 00:08:31,380 --> 00:08:32,620 fresh from the mainland. 106 00:08:41,820 --> 00:08:42,980 It's here to film 107 00:08:42,980 --> 00:08:44,580 their breeding behaviour. 108 00:08:50,900 --> 00:08:52,780 The timing's perfect. 109 00:08:52,780 --> 00:08:54,540 They're just waking up. 110 00:08:59,500 --> 00:09:01,860 Yawning pumps oxygen to the brain. 111 00:09:07,940 --> 00:09:09,140 Even wide awake, 112 00:09:09,140 --> 00:09:11,020 he needn't go far. 113 00:09:11,020 --> 00:09:13,060 His favourite food is all around him. 114 00:09:15,060 --> 00:09:16,060 Eucalyptus. 115 00:09:19,380 --> 00:09:21,340 But their leaves are not only tough, 116 00:09:21,340 --> 00:09:23,020 they are poisonous, 117 00:09:23,020 --> 00:09:25,860 so koalas have powerful digestive juices 118 00:09:25,860 --> 00:09:27,540 that neutralise the toxins. 119 00:09:31,020 --> 00:09:34,420 Just digesting their food saps energy, 120 00:09:34,420 --> 00:09:36,780 so they sleep up to 23 hours a day. 121 00:09:44,740 --> 00:09:46,140 But today, this koala 122 00:09:46,140 --> 00:09:47,900 is breaking the habit. 123 00:09:55,740 --> 00:09:57,340 In the breeding season, 124 00:09:57,340 --> 00:09:58,740 he must step up a gear. 125 00:10:01,060 --> 00:10:02,980 One of our mobile spy cams 126 00:10:02,980 --> 00:10:04,820 must rise to the challenge. 127 00:10:07,460 --> 00:10:09,380 Koalas rarely come to the ground 128 00:10:09,380 --> 00:10:11,900 or show such a turn of speed. 129 00:10:18,020 --> 00:10:20,260 But he now has a territory to defend. 130 00:10:21,500 --> 00:10:23,340 KOALA BELLOWS 131 00:10:23,340 --> 00:10:25,340 He bellows to announce he's in charge. 132 00:10:28,180 --> 00:10:29,540 A warning to other males. 133 00:10:31,220 --> 00:10:32,980 HE BELLOWS 134 00:10:37,820 --> 00:10:40,620 Koalas scent mark the ground 135 00:10:40,620 --> 00:10:43,220 to tell each other who's been passing through. 136 00:10:45,020 --> 00:10:47,260 He's caught the scent of a female. 137 00:10:54,460 --> 00:10:56,220 But this one already has a baby. 138 00:10:58,940 --> 00:11:00,260 No point chasing her. 139 00:11:04,540 --> 00:11:06,620 But she's not the only female here. 140 00:11:08,140 --> 00:11:10,900 And our spy is now keeping her company. 141 00:11:21,620 --> 00:11:25,060 The male's enthusiasm may be short-lived. 142 00:11:26,820 --> 00:11:28,500 A rival has found her first. 143 00:11:30,980 --> 00:11:32,980 He will have to challenge for possession. 144 00:11:32,980 --> 00:11:35,020 HE BELLOWS 145 00:11:37,060 --> 00:11:38,660 He announces his arrival 146 00:11:38,660 --> 00:11:39,940 with a warning. 147 00:11:39,940 --> 00:11:43,340 HE BELLOWS 148 00:11:47,020 --> 00:11:48,820 Spy Koala is witnessing 149 00:11:48,820 --> 00:11:50,260 something rarely filmed. 150 00:11:52,300 --> 00:11:54,140 A fight in the treetops. 151 00:11:58,980 --> 00:12:01,740 SCREECHING 152 00:12:19,100 --> 00:12:21,460 The only injury... 153 00:12:21,460 --> 00:12:23,300 ..a loss of dignity. 154 00:12:28,980 --> 00:12:30,620 The loser makes his retreat. 155 00:12:35,940 --> 00:12:38,500 While the challenger gets the girl. 156 00:12:49,180 --> 00:12:52,620 For all, that's quite enough activity for one day. 157 00:13:05,420 --> 00:13:08,060 Christmas Island in the Indian Ocean. 158 00:13:09,060 --> 00:13:10,260 Home to a creature 159 00:13:10,260 --> 00:13:12,340 found almost nowhere else on Earth. 160 00:13:15,580 --> 00:13:17,620 Every year, the monsoon rains 161 00:13:17,620 --> 00:13:18,980 sweep the island 162 00:13:18,980 --> 00:13:20,660 and trigger a mass awakening. 163 00:13:25,540 --> 00:13:27,460 Spy Crab is ready to capture 164 00:13:27,460 --> 00:13:29,380 what's about to unfold. 165 00:13:37,900 --> 00:13:40,180 The real crabs have been sealed 166 00:13:40,180 --> 00:13:42,180 in their burrows for months, 167 00:13:42,180 --> 00:13:43,540 avoiding the worst 168 00:13:43,540 --> 00:13:44,780 of the yearly drought. 169 00:13:53,340 --> 00:13:55,740 Now they emerge en masse. 170 00:14:01,700 --> 00:14:03,700 Each female carries thousands 171 00:14:03,700 --> 00:14:05,140 of eggs in a protective pouch 172 00:14:05,140 --> 00:14:06,340 beneath her belly. 173 00:14:08,460 --> 00:14:10,620 United by a common goal, 174 00:14:10,620 --> 00:14:12,900 they begin their march to the sea. 175 00:14:14,580 --> 00:14:17,100 A few soon become an army. 176 00:14:27,060 --> 00:14:28,940 They haven't eaten for months 177 00:14:28,940 --> 00:14:31,420 and are hungry for anything they can find. 178 00:14:34,780 --> 00:14:36,700 Sometimes even each other. 179 00:14:49,540 --> 00:14:50,820 But a robotic crab 180 00:14:50,820 --> 00:14:52,460 won't satisfy anyone's hunger. 181 00:14:56,300 --> 00:14:58,180 All in working order, 182 00:14:58,180 --> 00:15:00,580 Spy Crab rejoins the march to the sea. 183 00:15:15,020 --> 00:15:16,860 Since human settlers arrived, 184 00:15:16,860 --> 00:15:19,060 the crabs have faced hurdles 185 00:15:19,060 --> 00:15:20,260 never found in nature. 186 00:15:24,740 --> 00:15:26,780 The smallest try to squeeze through. 187 00:15:30,860 --> 00:15:32,900 The rest have just one option. 188 00:15:36,140 --> 00:15:37,460 To climb. 189 00:15:42,380 --> 00:15:45,340 No problem with six powerful legs to help. 190 00:16:09,060 --> 00:16:12,700 Once down, an even greater challenge awaits them. 191 00:16:26,260 --> 00:16:29,740 Many roads close in the migration season, but not all. 192 00:16:34,860 --> 00:16:35,980 There are always some 193 00:16:35,980 --> 00:16:37,060 that never make it. 194 00:16:40,140 --> 00:16:41,660 But here it's a case 195 00:16:41,660 --> 00:16:43,380 of waste not, want not. 196 00:16:48,220 --> 00:16:50,060 Now it's Spy Crab's turn. 197 00:17:25,420 --> 00:17:26,700 Against the odds, 198 00:17:26,700 --> 00:17:28,260 most make it to the coast. 199 00:17:41,860 --> 00:17:43,780 They assemble in the shade, 200 00:17:43,780 --> 00:17:45,420 waiting for the perfect moment. 201 00:17:49,180 --> 00:17:51,420 High tide triggers the final push. 202 00:18:09,900 --> 00:18:12,540 Then, in their thousands, 203 00:18:12,540 --> 00:18:13,980 they release their eggs. 204 00:18:18,260 --> 00:18:20,540 A victory dance speeds the process. 205 00:18:32,860 --> 00:18:36,100 Each crab may release 100,000 eggs, 206 00:18:36,100 --> 00:18:37,260 all swept out 207 00:18:37,260 --> 00:18:38,940 by the retreating tide. 208 00:18:40,580 --> 00:18:41,860 In four weeks' time, 209 00:18:41,860 --> 00:18:44,980 their hatchlings will return to the island. 210 00:18:51,140 --> 00:18:53,220 Madagascar. 211 00:18:53,220 --> 00:18:54,580 Bizarre baobab trees 212 00:18:54,580 --> 00:18:56,620 are a remnant of the island's 213 00:18:56,620 --> 00:18:58,660 ancient connection to Africa, 214 00:18:58,660 --> 00:19:00,620 now 300 miles west. 215 00:19:03,740 --> 00:19:06,380 It was once connected to Asia, too. 216 00:19:06,380 --> 00:19:07,980 Separated from both 217 00:19:07,980 --> 00:19:09,820 for millions of years, 218 00:19:09,820 --> 00:19:11,380 life here has taken 219 00:19:11,380 --> 00:19:13,100 its own evolutionary course. 220 00:19:15,980 --> 00:19:18,140 In the island's spiny forest, 221 00:19:18,140 --> 00:19:20,140 95% of plants 222 00:19:20,140 --> 00:19:22,220 exist nowhere else on Earth. 223 00:19:25,820 --> 00:19:27,940 And the animals are equally unique. 224 00:19:34,260 --> 00:19:36,220 A sifaka lemur. 225 00:19:36,220 --> 00:19:38,460 One of over 100 different species 226 00:19:38,460 --> 00:19:39,900 found only here. 227 00:19:48,460 --> 00:19:53,100 Madagascar is also home to half the world's species of chameleon. 228 00:20:00,540 --> 00:20:02,260 One of the most beautiful 229 00:20:02,260 --> 00:20:04,220 is the panther chameleon. 230 00:20:06,820 --> 00:20:08,140 This one's a spy. 231 00:20:15,220 --> 00:20:17,660 He's eyeing up a warty chameleon. 232 00:20:21,340 --> 00:20:22,940 To their own kind, 233 00:20:22,940 --> 00:20:24,580 they are fiercely territorial. 234 00:20:26,300 --> 00:20:28,500 But not, it seems, to our spy. 235 00:20:36,780 --> 00:20:39,820 While our chameleon is otherwise preoccupied, 236 00:20:39,820 --> 00:20:41,060 another takes over. 237 00:20:42,780 --> 00:20:44,660 It's soon spotted by another lemur. 238 00:20:50,500 --> 00:20:51,580 The ringtail. 239 00:20:55,060 --> 00:20:56,500 They spend more time on the ground 240 00:20:56,500 --> 00:20:57,660 than any other. 241 00:21:02,780 --> 00:21:05,380 They're also intelligent and curious. 242 00:21:09,220 --> 00:21:11,740 Anything new demands a second look. 243 00:21:19,180 --> 00:21:21,820 Lemurs are sun-worshippers. 244 00:21:21,820 --> 00:21:23,780 Adopting the lotus position 245 00:21:23,780 --> 00:21:25,660 helps raise their body temperature. 246 00:21:29,380 --> 00:21:30,580 Vital for an animal 247 00:21:30,580 --> 00:21:31,820 with a low metabolism. 248 00:21:40,100 --> 00:21:41,940 They're very good natured - 249 00:21:41,940 --> 00:21:43,980 even to those that steal their sun. 250 00:21:55,380 --> 00:21:57,420 After half an hour's meditation, 251 00:21:57,420 --> 00:21:58,740 the day begins. 252 00:22:01,820 --> 00:22:03,100 They live in large groups 253 00:22:03,100 --> 00:22:04,300 up to 30 strong. 254 00:22:06,580 --> 00:22:09,180 Their tail acts as a flag, 255 00:22:09,180 --> 00:22:10,740 making sure no-one gets lost. 256 00:22:16,100 --> 00:22:17,700 While ringtails spend 257 00:22:17,700 --> 00:22:19,340 most of their time on the ground... 258 00:22:22,020 --> 00:22:24,220 ..sifakas spent most of theirs 259 00:22:24,220 --> 00:22:25,860 in the trees. 260 00:22:28,260 --> 00:22:29,700 Their powerful legs 261 00:22:29,700 --> 00:22:31,060 and stabilising tails 262 00:22:31,060 --> 00:22:33,340 help them leap up to ten metres. 263 00:22:40,260 --> 00:22:41,660 Adapted for jumping 264 00:22:41,660 --> 00:22:42,860 from tree to tree, 265 00:22:42,860 --> 00:22:43,900 they have trouble 266 00:22:43,900 --> 00:22:45,140 walking on all fours. 267 00:22:54,660 --> 00:22:56,220 They have a unique solution. 268 00:22:58,900 --> 00:22:59,940 They pogo. 269 00:23:10,340 --> 00:23:12,580 How better to cross open ground? 270 00:23:37,340 --> 00:23:39,580 It may not be conventional, 271 00:23:39,580 --> 00:23:41,260 but it's surprisingly quick. 272 00:23:45,020 --> 00:23:46,700 In just a few seconds, 273 00:23:46,700 --> 00:23:47,820 they can be gone. 274 00:23:53,620 --> 00:23:55,540 Leaving our spy with those 275 00:23:55,540 --> 00:23:57,460 who prefer life in the slow lane. 276 00:24:02,340 --> 00:24:04,220 Back on Kangaroo Island, 277 00:24:04,220 --> 00:24:05,740 it's now the breeding season 278 00:24:05,740 --> 00:24:08,420 for the animals that gave the island its name. 279 00:24:11,620 --> 00:24:13,900 This type of the western grey kangaroo 280 00:24:13,900 --> 00:24:15,540 is smaller and stockier 281 00:24:15,540 --> 00:24:18,020 than its mainland relatives. 282 00:24:18,020 --> 00:24:20,220 They, too, hang around in groups 283 00:24:20,220 --> 00:24:21,420 known as mobs. 284 00:24:22,740 --> 00:24:24,860 Each consists of up to ten females 285 00:24:24,860 --> 00:24:27,500 and their babies, called joeys. 286 00:24:30,140 --> 00:24:32,140 Every mob has an adult male, 287 00:24:32,140 --> 00:24:33,620 known as a boomer, 288 00:24:33,620 --> 00:24:35,660 keeping an eye out for them. 289 00:24:37,980 --> 00:24:41,340 Now there's a newcomer in their ranks. 290 00:24:44,900 --> 00:24:46,180 The boomer checks out 291 00:24:46,180 --> 00:24:48,220 any new member of his gang. 292 00:24:55,140 --> 00:24:56,980 She looks the part. 293 00:24:58,540 --> 00:24:59,980 That's good enough for him. 294 00:25:03,460 --> 00:25:04,700 Inside the mob, 295 00:25:04,700 --> 00:25:06,700 females often act as aunties 296 00:25:06,700 --> 00:25:08,180 to each other's joeys. 297 00:25:13,260 --> 00:25:15,980 One joey has taken a shine to Spy Roo. 298 00:25:20,140 --> 00:25:21,540 He seems to regard her 299 00:25:21,540 --> 00:25:22,620 as an auntie, too. 300 00:25:25,660 --> 00:25:28,820 Then, as the ultimate sign of acceptance, 301 00:25:28,820 --> 00:25:30,700 he even tries to suckle. 302 00:25:38,180 --> 00:25:40,060 Despite the apparent harmony, 303 00:25:40,060 --> 00:25:42,260 there are dangerous rivalries here, too. 304 00:25:44,780 --> 00:25:46,780 Competing males are everywhere, 305 00:25:46,780 --> 00:25:48,340 hoping to steal a female. 306 00:26:08,540 --> 00:26:11,220 Their liaison is no longer a secret. 307 00:26:17,220 --> 00:26:19,260 It's something no boomer would tolerate. 308 00:26:23,460 --> 00:26:25,300 First, a bit of shoving, 309 00:26:29,180 --> 00:26:30,700 Then, the claws are out. 310 00:26:37,980 --> 00:26:40,940 His mob can only watch from the sidelines. 311 00:27:03,340 --> 00:27:04,860 Now for the big guns. 312 00:27:07,580 --> 00:27:08,900 The kick can deliver 313 00:27:08,900 --> 00:27:10,620 a blow over of two tonnes. 314 00:27:21,060 --> 00:27:22,820 Victory for now. 315 00:27:28,140 --> 00:27:30,100 But the boomer must always stay on guard. 316 00:27:32,580 --> 00:27:34,060 Meanwhile, peace returns. 317 00:27:45,020 --> 00:27:48,460 And the joey's adopted auntie 318 00:27:48,460 --> 00:27:51,060 is the centre of attention once more. 319 00:27:58,060 --> 00:28:00,380 Just off the coast of South Africa 320 00:28:00,380 --> 00:28:01,820 lies a small outcrop 321 00:28:01,820 --> 00:28:03,220 known as Seal Island. 322 00:28:07,700 --> 00:28:09,780 Cape gulls are common here, 323 00:28:09,780 --> 00:28:11,780 but this one has a camera 324 00:28:11,780 --> 00:28:14,380 in its eye and belly. 325 00:28:14,380 --> 00:28:15,900 Below are the Cape fur seals 326 00:28:15,900 --> 00:28:17,700 that gave the island its name. 327 00:28:21,660 --> 00:28:23,140 Over 60,000 of them. 328 00:28:27,660 --> 00:28:29,660 They feed on the vast fish stocks 329 00:28:29,660 --> 00:28:32,700 that thrive in the cold Antarctic currents. 330 00:28:34,980 --> 00:28:36,340 At this time of year, 331 00:28:36,340 --> 00:28:37,980 they gather to raise their young. 332 00:28:41,980 --> 00:28:44,060 Among them is a spy. 333 00:28:58,100 --> 00:29:00,100 He can sneak right up close 334 00:29:00,100 --> 00:29:01,940 without raising suspicion. 335 00:29:07,220 --> 00:29:08,660 Touching noses shows 336 00:29:08,660 --> 00:29:10,460 they are totally at ease. 337 00:29:18,420 --> 00:29:22,260 All around, the pups are growing fast. 338 00:29:22,260 --> 00:29:25,100 Fed on their mother's full-fat milk, 339 00:29:25,100 --> 00:29:26,620 they quickly outgrow 340 00:29:26,620 --> 00:29:27,900 their island home. 341 00:29:29,380 --> 00:29:31,380 Everyone is squabbling over space. 342 00:29:37,460 --> 00:29:40,820 Soon they must venture into the water, 343 00:29:40,820 --> 00:29:42,780 including our spy. 344 00:29:58,260 --> 00:30:01,660 Female seals are known to adopt orphans. 345 00:30:01,660 --> 00:30:03,300 Perhaps this is why Spy Seal 346 00:30:03,300 --> 00:30:04,700 is creating interest. 347 00:30:14,260 --> 00:30:15,900 He's also a welcome playmate 348 00:30:15,900 --> 00:30:17,300 to the younger seals. 349 00:30:34,140 --> 00:30:35,340 But in nature, 350 00:30:35,340 --> 00:30:37,020 danger is never far away. 351 00:30:39,860 --> 00:30:41,500 Spy Gull is patrolling the waters 352 00:30:41,500 --> 00:30:42,700 around the island. 353 00:30:44,820 --> 00:30:47,500 Below, the ocean's greatest predator. 354 00:30:51,620 --> 00:30:53,220 A great white shark. 355 00:30:56,500 --> 00:30:58,500 Each year, over 40 gather here 356 00:30:58,500 --> 00:31:00,100 to hunt the young seals. 357 00:31:02,700 --> 00:31:04,420 Spy Seal is the first 358 00:31:04,420 --> 00:31:06,060 to see the shark approach. 359 00:31:29,620 --> 00:31:31,220 But one young seal 360 00:31:31,220 --> 00:31:32,860 is still blissfully unaware. 361 00:31:36,940 --> 00:31:38,460 Seen from above, 362 00:31:38,460 --> 00:31:40,180 a game of cat and mouse unfolds. 363 00:31:56,820 --> 00:31:58,700 The seal may be young, 364 00:31:58,700 --> 00:32:00,500 but he's quick and manoeuvrable. 365 00:32:11,260 --> 00:32:12,420 From above, 366 00:32:12,420 --> 00:32:14,380 something remarkable becomes clear. 367 00:32:15,820 --> 00:32:19,300 The seal pup can turn faster than the shark. 368 00:32:19,300 --> 00:32:20,740 He deliberately gets behind it, 369 00:32:20,740 --> 00:32:21,820 out of sight. 370 00:32:26,980 --> 00:32:28,580 Whenever the shark turns, 371 00:32:28,580 --> 00:32:30,420 the seal stays right on its tail. 372 00:32:40,300 --> 00:32:41,780 Until finally... 373 00:32:41,780 --> 00:32:43,620 ..he makes his escape. 374 00:32:49,540 --> 00:32:52,340 Our spy is now the only seal remaining. 375 00:32:59,180 --> 00:33:01,140 The shark begins to circle... 376 00:33:05,260 --> 00:33:07,180 ..checking out yet another likely target. 377 00:33:13,500 --> 00:33:15,180 Sharks can detect 378 00:33:15,180 --> 00:33:16,460 minute electric fields. 379 00:33:17,860 --> 00:33:19,820 Spy Seal has plenty of those. 380 00:33:25,380 --> 00:33:27,100 At every pass, it gets closer. 381 00:33:33,980 --> 00:33:35,740 The first bite is exploratory. 382 00:33:41,020 --> 00:33:43,060 Testing if it's a worthwhile meal. 383 00:33:59,700 --> 00:34:01,540 This wasn't what it was looking for. 384 00:34:04,820 --> 00:34:06,220 Battered and bruised, 385 00:34:06,220 --> 00:34:08,060 Spy Seal is left alone. 386 00:34:14,580 --> 00:34:15,940 But it's a long way 387 00:34:15,940 --> 00:34:16,980 back to the island. 388 00:34:22,700 --> 00:34:24,180 Over 5,000 miles away, 389 00:34:24,180 --> 00:34:26,260 off the coast of Western Australia, 390 00:34:26,260 --> 00:34:28,820 is Rottnest Island, 391 00:34:28,820 --> 00:34:31,380 home to one of the most photogenic creatures on Earth. 392 00:34:38,940 --> 00:34:40,980 Meet the quokkas, 393 00:34:40,980 --> 00:34:43,220 the only native mammals to live here. 394 00:34:46,620 --> 00:34:47,820 These marsupials 395 00:34:47,820 --> 00:34:49,740 have no other living relatives 396 00:34:49,740 --> 00:34:52,020 and exist only in a few places in Australia. 397 00:34:55,180 --> 00:34:57,620 They have a friendly reputation. 398 00:35:01,020 --> 00:35:03,340 So our spy should fit right in. 399 00:35:15,300 --> 00:35:16,820 It's all going to plan. 400 00:35:20,180 --> 00:35:22,780 As few predators are found on the island, 401 00:35:22,780 --> 00:35:25,020 they are curious and welcoming. 402 00:35:37,500 --> 00:35:39,860 Spy Quokka's mission is to find out 403 00:35:39,860 --> 00:35:41,700 how they raise their young. 404 00:35:43,780 --> 00:35:45,420 Quokkas are vegetarians 405 00:35:45,420 --> 00:35:47,700 and tea tree is one of their favourites. 406 00:35:58,540 --> 00:36:00,540 Behind their cute smile 407 00:36:00,540 --> 00:36:02,100 are some razor-sharp teeth. 408 00:36:04,620 --> 00:36:07,300 And they use their five-fingered hands for grasping. 409 00:36:12,580 --> 00:36:14,620 Quokkas eats so much vegetation, 410 00:36:14,620 --> 00:36:16,020 they rarely need to drink. 411 00:36:31,100 --> 00:36:33,940 But this is what our spy has come to see. 412 00:36:41,420 --> 00:36:42,420 A baby quokka. 413 00:36:47,220 --> 00:36:49,340 A joey, just three months old. 414 00:36:54,220 --> 00:36:55,300 All marsupials 415 00:36:55,300 --> 00:36:57,460 carry their babies in a pouch. 416 00:36:57,460 --> 00:36:59,300 Quokkas are no exception. 417 00:37:01,540 --> 00:37:02,940 For the last three months, 418 00:37:02,940 --> 00:37:04,780 he's relied on his mother's milk. 419 00:37:08,020 --> 00:37:10,220 Now he's trying solid food. 420 00:37:10,220 --> 00:37:11,260 But, as a result, 421 00:37:11,260 --> 00:37:13,900 he's getting too big for his pouch. 422 00:37:21,260 --> 00:37:22,580 Withholding food is one way 423 00:37:22,580 --> 00:37:23,860 to deal with the problem. 424 00:37:27,580 --> 00:37:31,380 It's already quite a squeeze to get out, 425 00:37:31,380 --> 00:37:33,620 but there's a big, wide world to explore. 426 00:37:39,540 --> 00:37:41,620 He's going to need a lot of looking after. 427 00:38:03,100 --> 00:38:04,620 Our spy now witnesses 428 00:38:04,620 --> 00:38:06,500 another sight of quokka life. 429 00:38:09,380 --> 00:38:11,260 For all their cuteness, 430 00:38:11,260 --> 00:38:13,700 quokkas will fight over food, 431 00:38:13,700 --> 00:38:15,260 especially tea tree. 432 00:38:22,340 --> 00:38:23,580 Even the joey's mother 433 00:38:23,580 --> 00:38:24,820 isn't keen to share. 434 00:38:34,380 --> 00:38:36,300 With all this competition, 435 00:38:36,300 --> 00:38:38,780 Spy Quokka is on dangerous ground. 436 00:38:56,740 --> 00:38:57,940 A peace offering. 437 00:39:06,860 --> 00:39:08,580 That seems to have done the trick. 438 00:39:17,020 --> 00:39:18,820 For the baby, it's been quite enough 439 00:39:18,820 --> 00:39:20,420 adventure for one day. 440 00:39:50,780 --> 00:39:52,700 Across the Indian Ocean, 441 00:39:52,700 --> 00:39:54,780 on the remote island of Komodo, 442 00:39:54,780 --> 00:39:56,420 the east winds are blowing. 443 00:39:58,820 --> 00:40:00,700 They bring the dry and harsh conditions 444 00:40:00,700 --> 00:40:02,700 that trigger the breeding season 445 00:40:02,700 --> 00:40:04,700 for the infamous Komodo dragon. 446 00:40:11,140 --> 00:40:13,940 Unique to these tiny Indonesian islands, 447 00:40:13,940 --> 00:40:16,060 they are the largest lizard in the world. 448 00:40:17,140 --> 00:40:18,980 Up to three metres in length. 449 00:40:24,260 --> 00:40:25,460 The forked tongue is used 450 00:40:25,460 --> 00:40:27,100 to detect odours. 451 00:40:29,540 --> 00:40:31,940 This male is seeking a mate. 452 00:40:39,980 --> 00:40:43,140 Spy Dragon looks just like the real thing. 453 00:40:51,300 --> 00:40:53,500 Certainly worth a closer inspection. 454 00:41:03,060 --> 00:41:05,100 He rakes his claws over the skin 455 00:41:05,100 --> 00:41:06,900 to try to release pheromones 456 00:41:06,900 --> 00:41:08,860 to reveal its sex and age. 457 00:41:11,980 --> 00:41:13,980 Then checks with his tongue. 458 00:41:19,300 --> 00:41:20,820 She may look the part, 459 00:41:20,820 --> 00:41:22,940 but she doesn't smell the part. 460 00:41:25,460 --> 00:41:27,220 There's nothing of interest here. 461 00:41:33,380 --> 00:41:35,540 He heads to the water hole - 462 00:41:35,540 --> 00:41:36,740 always a good meeting place 463 00:41:36,740 --> 00:41:37,980 at this time of year. 464 00:41:40,220 --> 00:41:43,660 Here, Spy Pig is also on duty. 465 00:41:49,260 --> 00:41:52,380 As wild pigs are often eaten by dragons, 466 00:41:52,380 --> 00:41:53,980 it soon attracts interest. 467 00:42:03,620 --> 00:42:06,620 Again, he uses his tongue to check its scent. 468 00:42:13,780 --> 00:42:15,420 But there is something 469 00:42:15,420 --> 00:42:17,860 far more interesting on the wind. 470 00:42:20,700 --> 00:42:22,340 A real female dragon. 471 00:42:28,780 --> 00:42:30,340 Some wooing is required. 472 00:42:33,820 --> 00:42:36,780 His advances captured by a mud cam. 473 00:43:06,300 --> 00:43:08,220 She stops to show she's interested. 474 00:43:12,260 --> 00:43:13,900 This time, raking the skin 475 00:43:13,900 --> 00:43:15,500 gives off all the right signals. 476 00:43:19,260 --> 00:43:21,380 Our spy captures what must be 477 00:43:21,380 --> 00:43:23,500 the closest reptiles get 478 00:43:23,500 --> 00:43:24,860 to a tender moment. 479 00:43:29,500 --> 00:43:31,420 But pheromones travel far. 480 00:43:32,940 --> 00:43:35,380 Another male is also on the scent. 481 00:43:59,140 --> 00:44:01,260 With testosterone raging, 482 00:44:01,260 --> 00:44:02,820 a fight is inevitable. 483 00:44:11,860 --> 00:44:14,540 The female has a vested interest in the outcome, 484 00:44:14,540 --> 00:44:15,820 so follows behind. 485 00:44:19,300 --> 00:44:21,300 They test their strength by wrestling. 486 00:44:35,740 --> 00:44:38,140 The victor pins his rival to the ground. 487 00:44:46,260 --> 00:44:47,700 And finally sees him off. 488 00:44:51,820 --> 00:44:54,260 But with everyone in a fighting mood, 489 00:44:54,260 --> 00:44:56,900 Spy Pig is no longer quite so safe. 490 00:45:22,860 --> 00:45:25,260 The other dragons are showing interest, too. 491 00:45:27,500 --> 00:45:28,940 He may be down, 492 00:45:28,940 --> 00:45:30,340 but he keeps on filming. 493 00:45:31,700 --> 00:45:32,780 At nearly 100kg, 494 00:45:32,780 --> 00:45:35,060 these dragons are ten times heavier 495 00:45:35,060 --> 00:45:37,500 than their victim, 496 00:45:37,500 --> 00:45:39,300 and they've hardly even started. 497 00:46:00,500 --> 00:46:02,260 For the first time ever, 498 00:46:02,260 --> 00:46:04,500 a view inside a dragon's mouth. 499 00:46:07,340 --> 00:46:08,940 One laden with venom 500 00:46:08,940 --> 00:46:10,380 and toxic saliva, 501 00:46:10,380 --> 00:46:12,220 dosed with over 50 types 502 00:46:12,220 --> 00:46:13,740 of deadly bacteria. 503 00:46:16,060 --> 00:46:18,900 But as Spy Pig doesn't taste edible, 504 00:46:18,900 --> 00:46:21,540 he's soon abandoned. 505 00:46:21,540 --> 00:46:23,180 Anyway, the Dragons still have 506 00:46:23,180 --> 00:46:24,260 romance on their mind. 507 00:46:29,020 --> 00:46:31,700 Spy Pig's days are well and truly over. 508 00:46:34,340 --> 00:46:37,620 While our friendly dragon survives unscathed. 509 00:46:44,300 --> 00:46:46,180 In the middle of the South Atlantic, 510 00:46:46,180 --> 00:46:47,980 the Falkland Islands 511 00:46:47,980 --> 00:46:50,420 become the focus of another spectacular event. 512 00:46:51,620 --> 00:46:53,500 Rockhopper penguins 513 00:46:53,500 --> 00:46:54,700 have arrived to breed. 514 00:46:58,940 --> 00:47:00,540 Here, too, is Spy Penguin. 515 00:47:01,740 --> 00:47:03,820 Part of an army of penguin cams 516 00:47:03,820 --> 00:47:06,300 ready to provide total coverage. 517 00:47:07,660 --> 00:47:09,940 While the mothers are fishing out at sea, 518 00:47:09,940 --> 00:47:11,220 the males are left 519 00:47:11,220 --> 00:47:12,740 on parenting duties. 520 00:47:14,180 --> 00:47:16,380 One is already in trouble. 521 00:47:16,380 --> 00:47:17,980 His chicks have hatched, 522 00:47:17,980 --> 00:47:20,780 and his partner is yet to return with food. 523 00:47:23,900 --> 00:47:25,820 Just off shore, another spy 524 00:47:25,820 --> 00:47:27,980 also awaits the penguins' return. 525 00:47:31,740 --> 00:47:33,860 They arrive without warning. 526 00:47:59,900 --> 00:48:02,420 Just getting ashore is difficult enough. 527 00:48:10,100 --> 00:48:12,060 Another penguin cam is there 528 00:48:12,060 --> 00:48:14,260 to film their achievement. 529 00:48:15,980 --> 00:48:17,740 Many more will be needed 530 00:48:17,740 --> 00:48:19,380 to cover the huge challenge ahead. 531 00:48:24,220 --> 00:48:25,540 To reach their chicks, 532 00:48:25,540 --> 00:48:27,500 somehow the penguins must scale 533 00:48:27,500 --> 00:48:29,540 this 100-metre cliff. 534 00:48:32,420 --> 00:48:33,780 Just reaching the first level 535 00:48:33,780 --> 00:48:34,860 is tricky enough. 536 00:48:44,260 --> 00:48:45,780 But rockhoppers will never let 537 00:48:45,780 --> 00:48:47,660 one mishap get in their way. 538 00:48:55,740 --> 00:48:57,540 Even though at every step 539 00:48:57,540 --> 00:48:59,260 they risk going back to the start. 540 00:49:08,860 --> 00:49:10,780 With a little fancy footwork, 541 00:49:10,780 --> 00:49:12,820 this female is faring best of all. 542 00:49:15,100 --> 00:49:16,660 However, she still needs 543 00:49:16,660 --> 00:49:18,260 to reach the next level up. 544 00:49:21,660 --> 00:49:23,980 But they're not called rockhoppers for nothing. 545 00:49:31,700 --> 00:49:34,500 Although a little practice is required. 546 00:49:35,580 --> 00:49:37,580 Or, perhaps, an easier route. 547 00:49:48,340 --> 00:49:50,860 But nothing here is ever that easy. 548 00:50:03,100 --> 00:50:04,780 Next, this aquatic bird 549 00:50:04,780 --> 00:50:06,380 must become a climber, 550 00:50:06,380 --> 00:50:07,700 with beaks and bills 551 00:50:07,700 --> 00:50:09,260 acting as crampons. 552 00:50:32,260 --> 00:50:35,860 Fortunately, a thick layer of fat cushions her fall. 553 00:50:48,060 --> 00:50:50,500 She follows an ancient route. 554 00:50:51,940 --> 00:50:55,180 The sides carved out by the beaks and claw marks 555 00:50:55,180 --> 00:50:57,180 of generations before her. 556 00:51:07,620 --> 00:51:12,540 For some, the intensity of the climb brings out a competitive streak. 557 00:51:19,940 --> 00:51:23,420 But our heroine avoids getting involved. 558 00:51:23,420 --> 00:51:26,260 Instead, she finds some welcome relief. 559 00:51:27,260 --> 00:51:28,860 A natural shower. 560 00:51:30,140 --> 00:51:34,020 A quick freshen up before meeting her partner. 561 00:51:34,020 --> 00:51:37,940 Just one more level to complete what's known in the trade 562 00:51:37,940 --> 00:51:39,940 as a chimney climb. 563 00:51:55,740 --> 00:51:59,140 Now it's just a matter of finding her mate. 564 00:51:59,140 --> 00:52:02,580 Not so easy when everyone here is equally feisty. 565 00:52:10,740 --> 00:52:13,220 The reunion will be short. 566 00:52:13,220 --> 00:52:16,020 to go fishing. 567 00:52:19,180 --> 00:52:21,980 They will each take shifts over the next six weeks, 568 00:52:21,980 --> 00:52:24,740 until the chicks are ready for a life at sea. 569 00:52:35,940 --> 00:52:39,420 Back in the Galapagos Islands, the moss-shrouded mountains 570 00:52:39,420 --> 00:52:43,780 of Santa Cruz set the scene for another remarkable gathering. 571 00:52:49,740 --> 00:52:54,220 Boulder-cam is on a mission to find this rare and secret event. 572 00:52:58,580 --> 00:53:02,380 It's not long before it finds the first hopeful sign. 573 00:53:03,500 --> 00:53:06,580 A giant Galapagos tortoise. 574 00:53:10,420 --> 00:53:14,540 Unique to these islands, at nearly two metres head to tail, 575 00:53:14,540 --> 00:53:16,540 they are the biggest in the world. 576 00:53:19,060 --> 00:53:23,860 In these moist mountain valleys, there is plenty for them to eat. 577 00:53:28,740 --> 00:53:33,180 But it's so tough and fibrous, they must feed for eight hours a day 578 00:53:33,180 --> 00:53:35,260 just to get enough nutrients. 579 00:53:40,060 --> 00:53:42,340 It's not the only tortoise here. 580 00:53:44,780 --> 00:53:47,020 There's a spy in disguise. 581 00:53:49,380 --> 00:53:51,460 It's the breeding season. 582 00:53:52,940 --> 00:53:56,380 Spy Tortoise could be just what he's looking for. 583 00:54:04,700 --> 00:54:08,980 Although he's never come across a female like this before. 584 00:54:19,900 --> 00:54:22,380 With 400 kilos on her back, 585 00:54:22,380 --> 00:54:25,020 it's a good job her shell is reinforced. 586 00:54:38,780 --> 00:54:41,260 Well, that was never going to work. 587 00:54:42,700 --> 00:54:46,580 But he soon picks up the scent of a real female... 588 00:54:48,220 --> 00:54:50,940 ..with both spies hot on his heels. 589 00:54:54,180 --> 00:54:57,940 He would have smelt her from over a mile away. 590 00:54:57,940 --> 00:55:00,700 A useful skill in such a dense forest. 591 00:55:08,300 --> 00:55:11,660 It's now just a case of following the sound. 592 00:55:11,660 --> 00:55:13,340 TORTOISE GROANS 593 00:55:23,060 --> 00:55:25,140 Mating can last for hours. 594 00:55:26,780 --> 00:55:28,820 TORTOISE GROANS 595 00:55:41,980 --> 00:55:44,420 It never ends gracefully. 596 00:55:48,660 --> 00:55:51,780 Finding a mating pair is quite an achievement. 597 00:55:51,780 --> 00:55:55,220 But our spies have yet to complete their mission. 598 00:55:58,220 --> 00:56:00,260 But this is a hopeful sign. 599 00:56:05,580 --> 00:56:09,140 In fact, Galapagos tortoises are everywhere. 600 00:56:10,820 --> 00:56:12,260 And here it is... 601 00:56:13,460 --> 00:56:16,300 ..their Shangri-La. 602 00:56:16,300 --> 00:56:19,820 An incredible gathering of over 30 giant tortoises. 603 00:56:27,620 --> 00:56:29,740 All enjoying the fresh water 604 00:56:29,740 --> 00:56:32,220 found in just a few mountain pools. 605 00:56:40,100 --> 00:56:42,740 It's a haven for other wildlife, too. 606 00:56:45,140 --> 00:56:47,380 The Galapagos pintail duck. 607 00:56:53,420 --> 00:56:56,140 For the tortoises, the pools not only offer a place 608 00:56:56,140 --> 00:57:00,300 to drink and chill, but to absorb the food they've eaten. 609 00:57:02,460 --> 00:57:05,220 Our spy's mission is finally complete. 610 00:57:06,700 --> 00:57:10,820 Leaving the tortoises to digest their high-fibre meal. 611 00:57:16,820 --> 00:57:20,740 Next time, our spy creatures venture to the Poles to find 612 00:57:20,740 --> 00:57:23,140 the extraordinary animals that thrive in a world 613 00:57:23,140 --> 00:57:24,820 of ice and snow.