1 00:00:39,200 --> 00:00:40,838 Australia - 2 00:00:40,960 --> 00:00:42,678 an island continent 3 00:00:42,800 --> 00:00:47,351 cast adrift during the time of the dinosaurs. 4 00:01:06,760 --> 00:01:12,199 Isolated from the rest of life on land for millions of years, 5 00:01:12,320 --> 00:01:18,191 the animals cast away here are today like none elsewhere. 6 00:01:21,480 --> 00:01:24,950 This is a land of survivors. 7 00:01:52,440 --> 00:01:57,594 The jungles of northern Australia - the oldest on our planet. 8 00:02:00,200 --> 00:02:04,398 Unchanged for 180 million years. 9 00:02:07,640 --> 00:02:11,270 The animals and plants here are armed... 10 00:02:13,840 --> 00:02:16,832 ...built to live alongside dinosaurs. 11 00:02:20,040 --> 00:02:23,795 Now there is just one giant left. 12 00:02:28,480 --> 00:02:32,838 With claws longer than a velociraptor and nearly two metres tall... 13 00:02:34,040 --> 00:02:37,158 ...the cassowary rules this forest. 14 00:02:37,280 --> 00:02:38,554 (BOOMING CALL) 15 00:02:47,120 --> 00:02:50,317 But the key to its success is not its stature... 16 00:02:54,040 --> 00:02:58,079 ...it's the male's abilities as a parent. 17 00:03:00,320 --> 00:03:03,836 This one's chicks are six weeks old, 18 00:03:03,960 --> 00:03:07,237 and he will raise them by himself. 19 00:03:13,880 --> 00:03:16,190 Every morsel of food is valuable 20 00:03:16,320 --> 00:03:19,551 if his chicks are to grow up tall and strong. 21 00:03:24,720 --> 00:03:26,597 But in this forest, 22 00:03:26,720 --> 00:03:29,633 most of the fruit is too big for the chicks. 23 00:03:35,200 --> 00:03:36,873 It must be cut up for them. 24 00:03:48,160 --> 00:03:51,551 There is food to be gathered throughout their territory... 25 00:03:52,880 --> 00:03:55,998 ...but it's not easy to find. 26 00:04:03,680 --> 00:04:06,433 He shows them how to cross water. 27 00:04:08,880 --> 00:04:12,714 But when your legs are only 20cm long, 28 00:04:12,840 --> 00:04:15,753 a stream like this is very deep. 29 00:04:20,680 --> 00:04:23,115 One takes the plunge... 30 00:04:25,680 --> 00:04:28,957 ...but for the other, this is too daunting. 31 00:04:33,640 --> 00:04:37,952 He turns and goes back the way he came. 32 00:04:39,160 --> 00:04:42,551 Out of sight and without his father's protection, 33 00:04:42,680 --> 00:04:44,557 he's vulnerable. 34 00:04:49,440 --> 00:04:54,435 Only half of cassowary chicks make it to adulthood... 35 00:04:55,720 --> 00:04:57,552 ...and for very good reason. 36 00:05:03,160 --> 00:05:08,075 Australia's prehistoric forests are still full of predators. 37 00:05:18,640 --> 00:05:19,550 (CHEEPS) 38 00:05:19,680 --> 00:05:21,956 Many manage to survive here 39 00:05:22,080 --> 00:05:26,472 by eating almost anything that's smaller than they are. 40 00:05:27,720 --> 00:05:29,791 - He needs to find his father... - (CHEEPS) 41 00:05:29,920 --> 00:05:31,194 ...and quickly. 42 00:05:47,240 --> 00:05:48,560 (CHEEPS) 43 00:05:48,680 --> 00:05:51,957 The male hears his cries and answers... 44 00:05:53,360 --> 00:05:58,912 ...using a special call that carries well through the thick forest. 45 00:05:59,040 --> 00:06:00,792 (THROATY CALL) 46 00:06:07,320 --> 00:06:12,633 And then a glimpse of some reassuring bright colours. 47 00:06:35,640 --> 00:06:38,792 Their bonds are stronger than their fears. 48 00:06:46,040 --> 00:06:51,114 The male will guide and protect his chicks for another eight months 49 00:06:51,240 --> 00:06:52,753 before he mates again. 50 00:07:02,840 --> 00:07:08,472 Australia was once part of the vast supercontinent of Gondwanaland... 51 00:07:08,600 --> 00:07:12,036 - (THUNDER RUMBLES) - ...covered in forest and full of life. 52 00:07:13,480 --> 00:07:15,471 Dinosaurs dominated. 53 00:07:15,600 --> 00:07:18,160 Mammals had only just appeared. 54 00:07:19,880 --> 00:07:23,271 Then Australia began to break away. 55 00:07:24,720 --> 00:07:30,193 Cast adrift on this new island were reptiles, birds and early mammals 56 00:07:30,320 --> 00:07:34,154 that then evolved in isolation from the rest of the world. 57 00:07:35,360 --> 00:07:37,715 None could now leave this giant island, 58 00:07:37,840 --> 00:07:39,717 and very few could get here... 59 00:07:41,320 --> 00:07:42,879 ...unless they could fly. 60 00:07:47,880 --> 00:07:49,951 A little red flying fox. 61 00:07:53,040 --> 00:07:55,839 Their ancestors flew here, 62 00:07:55,960 --> 00:07:58,713 travelling along the chain of volcanic islands 63 00:07:58,840 --> 00:08:00,797 that links Asia to Australia. 64 00:08:04,000 --> 00:08:09,518 But their huge wings, which stretch from their fingers to their toes, 65 00:08:09,640 --> 00:08:13,793 make it difficult for them to walk or take off from the ground, 66 00:08:13,920 --> 00:08:19,711 so, when they want to rest, they hang upside down in trees. 67 00:08:42,960 --> 00:08:46,430 But the bats have to drink every day. 68 00:08:48,920 --> 00:08:51,594 And they do so on the wing. 69 00:09:03,520 --> 00:09:06,592 They swoop just low enough to wet their bellies 70 00:09:06,720 --> 00:09:10,759 and then, back in their roosts, they will suck out the water. 71 00:09:17,520 --> 00:09:20,558 Each evening, 10,000 of them come here. 72 00:09:34,240 --> 00:09:36,709 Not all of them return. 73 00:09:38,640 --> 00:09:41,109 - Every two metres of river, there is... - (BATS SCREECH) 74 00:09:41,240 --> 00:09:42,674 ...a crocodile. 75 00:09:45,960 --> 00:09:50,750 They were here long before the bats... 76 00:09:53,560 --> 00:09:58,270 ...survivors from Australia's prehistoric past. 77 00:10:32,680 --> 00:10:37,117 These dramas have been taking place for millions of years... 78 00:10:41,240 --> 00:10:43,277 ...aerial agility... 79 00:10:44,600 --> 00:10:45,670 ...versus patience... 80 00:10:48,040 --> 00:10:49,553 ...and deadly speed. 81 00:11:06,480 --> 00:11:12,237 Australia's forests are hostile places in which to make your home. 82 00:11:20,000 --> 00:11:24,517 As you move inland, the forest thins, the air cools 83 00:11:24,640 --> 00:11:28,599 and the land, as it gets higher, changes dramatically. 84 00:11:32,520 --> 00:11:34,716 (WIND BLOWS) 85 00:11:40,120 --> 00:11:44,956 The Great Dividing Range, 2,000 metres above the jungle. 86 00:11:48,120 --> 00:11:53,069 To survive here, you must be able to tolerate really harsh conditions. 87 00:12:06,880 --> 00:12:11,431 Kangaroos, like nearly all of the continent's native mammals, 88 00:12:11,560 --> 00:12:12,595 are marsupials... 89 00:12:15,320 --> 00:12:20,156 ...mammals that rear their young usually in a pouch on the mother's belly. 90 00:12:22,400 --> 00:12:26,473 And the young up here certainly need such shelter. 91 00:12:38,520 --> 00:12:43,230 No kangaroos can survive for long higher than this. 92 00:13:02,200 --> 00:13:06,194 But there is an even tougher marsupial up here. 93 00:13:19,280 --> 00:13:20,429 A wombat. 94 00:13:21,480 --> 00:13:25,474 She usually shelters underground in a burrow, 95 00:13:25,600 --> 00:13:28,911 but now that is under a metre of snow, 96 00:13:29,040 --> 00:13:31,759 together with all the grass on which she lives. 97 00:13:33,320 --> 00:13:36,153 She weighs as much a big dog 98 00:13:36,280 --> 00:13:38,669 and has the legs of a small one - 99 00:13:38,800 --> 00:13:41,872 not ideal for deep snow. 100 00:13:48,440 --> 00:13:52,035 Fragments of bark hardly count even as a snack... 101 00:13:53,280 --> 00:13:54,759 ...and she's hungry. 102 00:14:03,280 --> 00:14:05,669 She needs grass. 103 00:14:14,200 --> 00:14:18,512 But it's over a mile away, across a frozen river. 104 00:14:22,920 --> 00:14:25,480 Wombats might not be fast, 105 00:14:25,600 --> 00:14:27,557 but then they don't need to be up here. 106 00:14:28,600 --> 00:14:30,910 They can survive on next to nothing. 107 00:14:36,520 --> 00:14:40,400 A few mouthfuls will be enough food for over a week. 108 00:14:43,080 --> 00:14:47,756 And there's not much competition for it in this small corner of the continent. 109 00:14:55,720 --> 00:14:59,873 Snowy peaks are hardly typical of Australia, 110 00:15:00,000 --> 00:15:03,277 but the Great Dividing Range is a remnant 111 00:15:03,400 --> 00:15:07,075 of what were once some of the longest mountain chains on Earth. 112 00:15:10,240 --> 00:15:13,756 They connected Australia and Antarctica. 113 00:15:15,840 --> 00:15:19,435 But then these sister continents broke apart. 114 00:15:19,560 --> 00:15:24,191 Antarctica, drifting southwards, became locked in ice. 115 00:15:24,320 --> 00:15:28,154 Australia drifted northwards towards the equator 116 00:15:28,280 --> 00:15:31,432 and became hotter and drier. 117 00:15:33,040 --> 00:15:34,917 Woodlands developed, 118 00:15:35,040 --> 00:15:38,158 and in places where rainfall was low - 119 00:15:38,280 --> 00:15:39,873 open grasslands. 120 00:15:46,400 --> 00:15:48,471 On these grassy plains, 121 00:15:48,600 --> 00:15:51,592 animals had the space to thrive. 122 00:15:53,880 --> 00:15:56,918 These are also eastern grey kangaroos, 123 00:15:57,040 --> 00:15:59,316 and this is their true home. 124 00:15:59,440 --> 00:16:02,319 Here, they are well fed and powerful. 125 00:16:03,800 --> 00:16:09,830 Adults can stand over two metres tall and travel as fast as a racehorse. 126 00:16:09,960 --> 00:16:12,236 (BIRD SCREECHES) 127 00:16:15,160 --> 00:16:16,992 (SCREECHES) 128 00:16:17,120 --> 00:16:21,432 And on these open plains, you need speed... 129 00:16:22,800 --> 00:16:28,000 ...because where there are large herds, there will be predators. 130 00:16:30,600 --> 00:16:31,590 (DINGO HOWLS) 131 00:16:33,240 --> 00:16:37,916 Dingoes - descendants of wolves that were brought here 132 00:16:38,040 --> 00:16:42,193 over 4,000 years ago by human visitors from Asia. 133 00:16:46,840 --> 00:16:50,356 This pack is led by a white female... 134 00:16:51,480 --> 00:16:53,039 ...and they are hunting. 135 00:17:16,280 --> 00:17:20,513 Creating panic tests the herd. 136 00:17:48,560 --> 00:17:51,120 Mothers with young in their pouches might be slower... 137 00:17:54,520 --> 00:17:57,160 ...but they can still outrun a dingo. 138 00:18:01,840 --> 00:18:04,036 Maybe an ambush will work. 139 00:18:12,040 --> 00:18:18,036 But even young, newly independent kangaroos seem uncatchable. 140 00:18:24,560 --> 00:18:27,757 Across these open, flat plains, 141 00:18:27,880 --> 00:18:30,872 the dingoes are just not fast enough. 142 00:18:34,320 --> 00:18:38,109 But what makes the white female their leader is her stamina 143 00:18:38,240 --> 00:18:41,756 and, particularly, her intelligence. 144 00:18:44,560 --> 00:18:48,872 She has run 18 miles today, but she still doesn't give up. 145 00:18:51,360 --> 00:18:55,752 A different group of kangaroos, this time on uneven ground. 146 00:18:59,040 --> 00:19:01,077 It's what she's been looking for. 147 00:19:09,120 --> 00:19:12,556 Driving them uphill, she's struggling to keep up with them. 148 00:19:30,760 --> 00:19:35,197 And as they hurtle down the other side, the kangaroos pick up speed. 149 00:19:37,640 --> 00:19:41,873 They will easily outpace her, if they stay in control. 150 00:20:23,360 --> 00:20:27,593 The white dingo has more than one reason to be so relentless. 151 00:20:29,520 --> 00:20:30,590 (PUPS WHINE) 152 00:20:31,680 --> 00:20:32,715 She's a mother. 153 00:20:37,600 --> 00:20:39,511 This is a rare sight. 154 00:20:40,880 --> 00:20:43,872 Dingo pups are hardly ever seen. 155 00:20:48,760 --> 00:20:51,115 With so much effort for just one meal, 156 00:20:51,240 --> 00:20:55,757 the open plains are tough places on which to raise young. 157 00:21:02,200 --> 00:21:04,635 These are gumtrees. 158 00:21:05,800 --> 00:21:09,111 They have leaves that are poisonous to most animals. 159 00:21:11,080 --> 00:21:12,957 But not the koala. 160 00:21:13,080 --> 00:21:15,071 They eat almost nothing else. 161 00:21:18,760 --> 00:21:21,354 There are echidnas in these forests, too - 162 00:21:21,480 --> 00:21:26,919 mammals that don't even have pouches but lay eggs, like reptiles. 163 00:21:34,040 --> 00:21:38,557 And there is an assassin here that has only recently been discovered. 164 00:21:43,720 --> 00:21:46,280 A Jotus jumping spider. 165 00:21:48,240 --> 00:21:50,800 She's only 5mm long, 166 00:21:50,920 --> 00:21:55,517 but, nonetheless, she's a stealthy and ferocious hunter. 167 00:21:57,240 --> 00:22:00,358 She searches for prey among the grass stems. 168 00:22:20,880 --> 00:22:24,475 She's single-minded and focused on hunting. 169 00:22:31,960 --> 00:22:33,997 But today might be different. 170 00:22:37,920 --> 00:22:41,754 This is something new, 171 00:22:41,880 --> 00:22:44,349 something fast... 172 00:22:46,960 --> 00:22:48,473 ...and a little trickier. 173 00:22:54,880 --> 00:22:56,712 But what is it? 174 00:22:56,840 --> 00:22:58,194 Is it food? 175 00:23:17,800 --> 00:23:22,237 It's a male Jotus, looking for a mate. 176 00:23:28,280 --> 00:23:31,398 He needs to catch her attention, 177 00:23:31,520 --> 00:23:35,514 but female Jotus only mate once. 178 00:23:35,640 --> 00:23:38,792 If she's mated before, she might kill him. 179 00:23:42,440 --> 00:23:45,034 He will need to seduce her with care. 180 00:23:49,000 --> 00:23:53,312 Waving his arms makes his intentions clear. 181 00:23:53,440 --> 00:23:55,431 He's a friend, not food. 182 00:23:59,440 --> 00:24:01,795 No sign of an attack...yet. 183 00:24:07,560 --> 00:24:10,791 But she doesn't seem particularly impressed. 184 00:24:15,240 --> 00:24:18,232 Time to try his best move... 185 00:24:19,800 --> 00:24:20,870 ...the double paddle. 186 00:24:22,320 --> 00:24:24,357 That surely will do the trick. 187 00:24:42,720 --> 00:24:44,597 One final wave... 188 00:24:53,760 --> 00:24:55,319 ...and he's tamed her. 189 00:24:55,440 --> 00:24:58,193 She stays still for just long enough. 190 00:25:17,880 --> 00:25:21,760 And then he retreats quickly, before she has second thoughts. 191 00:25:38,280 --> 00:25:41,875 If you travel still further towards the centre of Australia, 192 00:25:42,000 --> 00:25:45,038 the landscape changes yet again. 193 00:25:45,160 --> 00:25:47,800 Trees and grass disappear. 194 00:25:51,080 --> 00:25:55,153 The continent, throughout prehistory, continued to drift north, 195 00:25:55,280 --> 00:25:59,399 and as it entered the tropics, it got hotter and hotter. 196 00:26:01,160 --> 00:26:05,279 Over thousands of years, the grasslands of the centre dried, 197 00:26:05,400 --> 00:26:07,755 and lakes and rivers turned dust. 198 00:26:09,360 --> 00:26:14,719 The rocks have been reduced to sand by the hot, blasting winds. 199 00:26:16,880 --> 00:26:20,794 Now Australia's centre is one vast desert. 200 00:26:22,440 --> 00:26:26,035 Its immensity is almost impossible to comprehend. 201 00:26:36,080 --> 00:26:40,153 This train running north is a half a mile long. 202 00:26:43,080 --> 00:26:45,469 Travelling at nearly 50 miles an hour, 203 00:26:45,600 --> 00:26:49,150 it takes almost three days to get from one side to another. 204 00:26:57,320 --> 00:27:03,236 Australia today is the driest inhabited continent on Earth. 205 00:27:07,240 --> 00:27:11,279 Rain hardly ever falls in 70% of it. 206 00:27:15,240 --> 00:27:20,792 From space, the continent is seen to be stained red by iron oxide - 207 00:27:20,920 --> 00:27:24,117 rust from its disintegrating rocks. 208 00:27:27,400 --> 00:27:33,555 In the surface are lines carved by winds over millennia. 209 00:27:34,720 --> 00:27:38,554 The very bones of the continent are now stripped bare... 210 00:27:40,040 --> 00:27:44,238 ...the foundations of what once were mountains. 211 00:27:55,840 --> 00:28:01,074 At its heart stands the great rock mountain of Uluru... 212 00:28:04,280 --> 00:28:09,798 ...sacred to the first people to arrive here 60,000 years ago. 213 00:28:34,760 --> 00:28:39,960 There is almost no soil here, few plants, few animals 214 00:28:40,080 --> 00:28:42,390 and almost no permanent water. 215 00:28:44,680 --> 00:28:48,435 It's a place where only the toughest can survive. 216 00:28:52,920 --> 00:28:56,151 This is the land of reptiles. 217 00:28:57,680 --> 00:29:02,072 Australia has more species of them than any other continent. 218 00:29:04,040 --> 00:29:06,236 The perentie, two metres long, 219 00:29:06,360 --> 00:29:10,035 is the biggest here, and he's thirsty. 220 00:29:16,920 --> 00:29:19,992 It only rains here once or twice a year. 221 00:29:20,120 --> 00:29:23,033 And when there isn't any rain, 222 00:29:23,160 --> 00:29:27,279 perenties get their water from eating lizards. 223 00:29:31,800 --> 00:29:35,270 There are several kinds to choose from... 224 00:29:38,840 --> 00:29:40,399 ...bearded dragons... 225 00:29:43,880 --> 00:29:45,871 ...blue-tongued skinks... 226 00:29:50,080 --> 00:29:51,479 ...and thorny devils. 227 00:29:51,600 --> 00:29:53,671 All are on the menu. 228 00:29:56,480 --> 00:30:00,633 The thorny devil also gets its water from its food. 229 00:30:06,000 --> 00:30:07,957 It's only the size of a mouse, 230 00:30:08,080 --> 00:30:13,314 but, even so, it must eat hundreds of ants every day to get what it needs. 231 00:30:13,440 --> 00:30:15,556 (THUNDER RUMBLES) 232 00:30:20,800 --> 00:30:26,557 Most storm clouds pass by without releasing any water. 233 00:30:30,400 --> 00:30:32,437 But just sometimes, 234 00:30:32,560 --> 00:30:35,120 there's a brief shower. 235 00:30:58,440 --> 00:31:01,796 Everyone makes the most of the opportunity. 236 00:31:10,160 --> 00:31:14,631 It's so hot the droplets will disappear within minutes. 237 00:31:15,720 --> 00:31:18,280 But the thorny devil has a trick. 238 00:31:23,960 --> 00:31:26,315 He's found a tiny puddle, 239 00:31:26,440 --> 00:31:28,317 only a few millimetres deep, 240 00:31:28,440 --> 00:31:30,829 and he dips his toe into it. 241 00:31:42,960 --> 00:31:46,078 His skin is like blotting paper. 242 00:31:51,640 --> 00:31:54,314 It collects moisture by capillary action, 243 00:31:54,440 --> 00:31:58,991 sucking it up along the inter-connecting grooves until he glistens all over. 244 00:32:03,080 --> 00:32:04,912 When the water reaches his mouth, 245 00:32:05,040 --> 00:32:06,360 he can collect it... 246 00:32:07,600 --> 00:32:11,195 ...while still keeping his head up, on the lookout for danger. 247 00:32:14,800 --> 00:32:19,351 The perentie is 200 times the size of a thorny devil. 248 00:32:19,480 --> 00:32:23,553 Tiny puddles and droplets are of no use to him. 249 00:32:26,360 --> 00:32:30,354 What he needs is a juicy lizard. 250 00:32:52,160 --> 00:32:56,472 That was a bearded dragon that wasn't quite quick enough. 251 00:33:04,400 --> 00:33:09,031 Even the perentie sometimes gets a chance to quench his thirst. 252 00:33:17,000 --> 00:33:22,951 There is one species that has truly conquered the Australian desert. 253 00:33:25,040 --> 00:33:27,839 They don't wait for water to come to them. 254 00:33:27,960 --> 00:33:33,638 They sometimes travel over 300 miles in a single day to find it. 255 00:33:35,200 --> 00:33:37,919 Australia's hardiest animal... 256 00:33:39,000 --> 00:33:40,638 (CHIRPS) 257 00:33:40,760 --> 00:33:42,637 ...the wild budgerigar... 258 00:33:42,760 --> 00:33:45,752 (BUDGIES CHIRP) 259 00:33:45,880 --> 00:33:49,669 ...the most accomplished of all desert nomads. 260 00:33:49,800 --> 00:33:52,679 These have been travelling together for weeks... 261 00:33:55,360 --> 00:33:59,240 ...and that has evidently caused a few domestic arguments. 262 00:34:08,280 --> 00:34:12,160 This is truly an immense community. 263 00:34:12,280 --> 00:34:15,750 There are over 10,000 budgies in this flock. 264 00:34:22,760 --> 00:34:25,320 Every one of them is thirsty. 265 00:34:33,360 --> 00:34:35,874 But although they've found this billabong... 266 00:34:37,080 --> 00:34:39,071 ...they must be wary. 267 00:34:41,560 --> 00:34:44,712 A hawk - and one that eats budgies. 268 00:34:51,320 --> 00:34:56,394 As long as it remains on the ground, the budgies will risk taking a drink. 269 00:35:15,000 --> 00:35:19,676 Once it takes to the air, however, the budgies are in danger. 270 00:35:23,200 --> 00:35:26,909 And it's not the only bird of prey here. 271 00:35:28,680 --> 00:35:33,277 The budgies have a simple but very effective defence - 272 00:35:33,400 --> 00:35:35,232 they all take to the wing at once. 273 00:35:39,360 --> 00:35:43,354 An aerial hunter needs to lock on to a single target for a few seconds 274 00:35:43,480 --> 00:35:45,312 if it is to catch it, 275 00:35:45,440 --> 00:35:48,398 but in this swirl, that's very hard to do. 276 00:35:58,640 --> 00:36:03,999 Flying in a flock keeps the budgies safe, but they're still desperate to drink. 277 00:36:11,400 --> 00:36:15,917 As soon as a particularly brave one takes the plunge, they all do. 278 00:36:22,120 --> 00:36:25,670 But once on the water, they are easier to target. 279 00:36:31,160 --> 00:36:34,278 They must drink quickly and stick together. 280 00:36:53,960 --> 00:36:58,557 The last ones to leave will be the ones in most danger. 281 00:37:22,480 --> 00:37:27,429 Only one has been taken from a flock of 10,000. 282 00:37:36,560 --> 00:37:39,518 In a few days, they will leave the area, 283 00:37:39,640 --> 00:37:41,153 on their never-ending search 284 00:37:41,280 --> 00:37:44,671 for the next brief opportunity to feed and drink. 285 00:38:02,200 --> 00:38:05,318 As the continent continued to drift north, 286 00:38:05,440 --> 00:38:08,751 it eventually entered warm, tropical seas. 287 00:38:11,520 --> 00:38:15,400 And here, in the crystal-clear, sunlit water, 288 00:38:15,520 --> 00:38:18,399 just a metre or two beneath the surface, 289 00:38:18,520 --> 00:38:20,591 life proliferated. 290 00:38:24,560 --> 00:38:28,474 Coral grows into reefs in these shallow seas. 291 00:38:31,520 --> 00:38:33,477 This is Ningaloo... 292 00:38:34,800 --> 00:38:38,270 ...today one of the richest anywhere in the world. 293 00:38:46,640 --> 00:38:51,237 Thousands of species of fish and all kinds of other organisms 294 00:38:51,360 --> 00:38:54,159 thrive in these coral cities. 295 00:38:55,600 --> 00:39:00,674 And they have attracted the most ancient of living predators. 296 00:39:07,920 --> 00:39:09,797 Sharks. 297 00:39:09,920 --> 00:39:15,598 They were around 200 million years before the dinosaurs. 298 00:39:18,560 --> 00:39:21,359 They're fast and agile, 299 00:39:21,480 --> 00:39:25,030 well able to pick off the small reef fish. 300 00:39:27,240 --> 00:39:30,631 But they come here for bigger rewards. 301 00:39:35,200 --> 00:39:38,875 These are fish from the open ocean, 302 00:39:39,000 --> 00:39:43,358 and every so often, for some reason, they swim over the reef. 303 00:39:53,800 --> 00:39:58,636 The small fish swirl like the budgies, and for the same reason. 304 00:39:58,760 --> 00:40:02,958 It makes it harder for a hunter to single out a particular target. 305 00:40:08,560 --> 00:40:12,394 But, in fact, the sharks aren't trying to catch them individually. 306 00:40:18,960 --> 00:40:23,750 They're driving them closer to the shore, penning them against the beach. 307 00:40:28,400 --> 00:40:33,554 Slowly, the sharks drive each new wave of fish into shallow water, 308 00:40:33,680 --> 00:40:36,194 and the bait ball grows. 309 00:40:44,440 --> 00:40:48,957 More sharks arrive, some from many miles away. 310 00:40:57,720 --> 00:41:00,030 And still the sharks don't attack. 311 00:41:01,160 --> 00:41:03,071 They're waiting... 312 00:41:04,160 --> 00:41:05,833 ...for the right moment. 313 00:41:13,480 --> 00:41:17,439 Millions of fish are now trapped in these shallow waters. 314 00:41:19,200 --> 00:41:23,433 It only happens like this once in every decade or so. 315 00:41:30,040 --> 00:41:32,839 The time has come to strike. 316 00:41:44,680 --> 00:41:48,071 For the sharks, this is a bonanza. 317 00:41:50,200 --> 00:41:52,191 They work together. 318 00:41:53,320 --> 00:41:56,950 Each shark now fills its stomach. 319 00:42:03,280 --> 00:42:08,275 These shallow seas are exceptionally rich in sharks. 320 00:42:10,160 --> 00:42:14,518 There are more species here than anywhere else on Earth. 321 00:42:26,080 --> 00:42:30,756 Australia is not only fringed by rich reefs 322 00:42:30,880 --> 00:42:36,273 but girdled with islands - some big, some small. 323 00:42:42,440 --> 00:42:46,320 Off the south coast lies by far the biggest of them. 324 00:42:47,760 --> 00:42:49,558 Tasmania. 325 00:42:52,440 --> 00:42:56,434 And that has its own special marsupial... 326 00:42:57,560 --> 00:43:01,349 ...one that seldom appears until after dark. 327 00:43:04,360 --> 00:43:06,670 The Tasmanian devil. 328 00:43:12,600 --> 00:43:16,514 Many predators inhabit a territory packed with prey. 329 00:43:16,640 --> 00:43:19,393 But here, there's nothing like that for them. 330 00:43:28,400 --> 00:43:32,155 Each may travel for miles night after night, 331 00:43:32,280 --> 00:43:36,592 prepared to eat anything it can find, dead or alive. 332 00:43:46,040 --> 00:43:48,793 The shoreline is a good place to search. 333 00:43:49,920 --> 00:43:53,390 There might be some small creatures to catch here, 334 00:43:53,520 --> 00:43:55,875 or maybe something that the tide has brought in. 335 00:44:06,400 --> 00:44:09,870 The carcass of a wallaby has been washed ashore. 336 00:44:17,320 --> 00:44:22,759 Tasmanian devils can eat 40% of their body weight in one session, 337 00:44:22,880 --> 00:44:25,554 and they have hugely powerful jaws. 338 00:44:25,680 --> 00:44:29,310 They tackle everything - even bones. 339 00:44:33,480 --> 00:44:34,800 Back at the den, 340 00:44:34,920 --> 00:44:37,639 there are other hungry mouths. 341 00:44:38,960 --> 00:44:41,156 (YAWNS) 342 00:44:44,680 --> 00:44:47,479 Her two youngsters are six months old. 343 00:44:49,120 --> 00:44:55,071 They still rely on their mother's milk, but they're feeling peckish! 344 00:44:58,880 --> 00:45:02,396 There must be something solid they could find for themselves 345 00:45:02,520 --> 00:45:04,238 while they're waiting for a drink. 346 00:45:12,160 --> 00:45:13,673 Is this food? 347 00:45:15,640 --> 00:45:16,710 (YELPS) 348 00:45:20,560 --> 00:45:21,755 (SNIFFS) 349 00:45:21,880 --> 00:45:24,269 That possum smells tasty... 350 00:45:26,680 --> 00:45:29,149 ...but it's a little high up. 351 00:45:31,520 --> 00:45:34,114 This looks more promising. 352 00:45:44,160 --> 00:45:47,755 At last, a giant stick! 353 00:45:49,640 --> 00:45:51,677 Not bad for a first go. 354 00:45:57,200 --> 00:46:01,831 Their mother will protect and feed these youngsters for another three months. 355 00:46:03,800 --> 00:46:08,636 Their survival is important to her, but also for us... 356 00:46:09,880 --> 00:46:14,317 ...because these are one of the last devil families in the world. 357 00:46:20,680 --> 00:46:23,399 Tasmanian devils are now endangered... 358 00:46:24,440 --> 00:46:26,511 ...found in only a few places, 359 00:46:26,640 --> 00:46:31,157 such as this remote islet off the coast of Tasmania. 360 00:46:37,400 --> 00:46:40,836 But they once lived across the whole of Australia. 361 00:46:42,480 --> 00:46:45,154 Evidence that this was so 362 00:46:45,280 --> 00:46:50,036 can be seen nearly 2,500 miles away from the devils' family den, 363 00:46:50,160 --> 00:46:53,994 on Australia's northern coast. 364 00:47:01,360 --> 00:47:04,352 This great stretch of boulders 365 00:47:04,480 --> 00:47:11,079 is covered by the largest concentration of prehistoric images anywhere in the world. 366 00:47:16,920 --> 00:47:20,356 Over one million pictures of wildlife... 367 00:47:24,720 --> 00:47:26,199 ...and among them... 368 00:47:27,960 --> 00:47:29,598 ...Tasmanian devil. 369 00:47:32,440 --> 00:47:37,230 It was engraved on stone 60,000 years ago 370 00:47:37,360 --> 00:47:41,069 by some of the first human beings to reach the continent. 371 00:47:44,800 --> 00:47:47,360 Then, just 200 years ago, 372 00:47:47,480 --> 00:47:53,192 European settlers arrived with guns and dogs, foxes and cats. 373 00:47:54,480 --> 00:47:58,519 Together, they decimated Australia's unique wildlife. 374 00:48:04,400 --> 00:48:08,519 This was one of the continent's biggest animal predators - 375 00:48:08,640 --> 00:48:11,234 a marsupial wolf, or thylacine. 376 00:48:13,320 --> 00:48:18,110 The last-known remaining one was filmed in 1936 377 00:48:18,240 --> 00:48:20,470 in a zoo just before it died... 378 00:48:21,920 --> 00:48:26,676 ...and so brought the final extinction of its species. 379 00:48:31,680 --> 00:48:34,957 These rocks are now its memorial. 380 00:48:39,520 --> 00:48:43,309 And they may become that for the Tasmanian devil as well. 381 00:48:45,680 --> 00:48:51,676 Mammals in Australia are disappearing faster than anywhere else on Earth. 382 00:48:55,680 --> 00:49:00,709 They succeeded in adapting to life as their home changed around them. 383 00:49:02,400 --> 00:49:05,597 But now they face their greatest challenge - 384 00:49:05,720 --> 00:49:09,793 the change to their world brought by humanity. 385 00:49:11,960 --> 00:49:15,919 Which of its unique species will survive the coming decades 386 00:49:16,040 --> 00:49:18,190 now depends on us. 387 00:49:31,080 --> 00:49:34,232 DAVID ATTENBOROUGH: The most ambitious shoot for the Australia team 388 00:49:34,360 --> 00:49:38,831 was filming the continent's top predator - the dingo - hunting. 389 00:49:42,800 --> 00:49:46,077 Elusive and shy, they're rarely seen. 390 00:49:50,720 --> 00:49:55,191 The crew journeyed to the high plains of Australia, 391 00:49:55,320 --> 00:50:00,838 where park rangers had reported sightings of a white dingo and her pack. 392 00:50:04,360 --> 00:50:07,352 In their first week, the team confirm the sightings... 393 00:50:07,480 --> 00:50:08,629 THEO: There she is. 394 00:50:10,000 --> 00:50:12,355 ...and begin to catch glimpses. 395 00:50:13,960 --> 00:50:15,837 But with the dingoes constantly on the move, 396 00:50:15,960 --> 00:50:19,715 keeping track of them is a challenge. 397 00:50:19,840 --> 00:50:23,595 They teleport around, because you just lose them in the grass. 398 00:50:23,720 --> 00:50:25,040 It's madness. 399 00:50:25,160 --> 00:50:29,313 Each time the crew arrive to set up... 400 00:50:30,400 --> 00:50:32,391 ...they're too late. 401 00:50:43,760 --> 00:50:45,831 1 couldn't believe how far she'd gone. 402 00:50:45,960 --> 00:50:48,474 By the time we managed to drive over the brow of the hill, 403 00:50:48,600 --> 00:50:50,876 she was a kilometre away. 404 00:50:52,040 --> 00:50:55,192 If they lose them, it could take days to find them again. 405 00:50:57,280 --> 00:51:02,229 And searching in outback Australia can be dangerous work. 406 00:51:02,360 --> 00:51:04,192 (PANICKED SCREAM) 407 00:51:10,480 --> 00:51:13,791 Brown snakes are one of the world's most venomous. 408 00:51:15,400 --> 00:51:18,711 And it's not only the snakes that have a nasty bite. 409 00:51:18,840 --> 00:51:19,830 Oh, dear! 410 00:51:19,960 --> 00:51:21,189 Look at that. 411 00:51:22,880 --> 00:51:23,995 Sorry. 412 00:51:28,600 --> 00:51:30,876 Turns out 1 just stood in an ants' nest. 413 00:51:34,640 --> 00:51:39,635 Over the coming weeks, the dingoes continue to give the crew the runaround. 414 00:51:40,960 --> 00:51:42,997 With such a large area to search, 415 00:51:43,120 --> 00:51:46,158 they enlist the help of two additional cameramen. 416 00:51:47,400 --> 00:51:52,315 Dan is a dingo expert and studied them for five years, 417 00:51:52,440 --> 00:51:55,239 and even he struggled to follow them. 418 00:51:55,360 --> 00:51:59,797 Dingoes are Australia's most heavily persecuted native animal... 419 00:51:59,920 --> 00:52:02,389 - (DINGO HOWLS) - ...and that makes them 420 00:52:02,520 --> 00:52:05,160 so incredibly elusive and hard to film. 421 00:52:06,160 --> 00:52:07,992 They're very scared of humans. 422 00:52:09,120 --> 00:52:13,432 Dingoes have lived in Australia for over 4,000 years, 423 00:52:13,560 --> 00:52:17,758 but when Europeans arrived with livestock, they were seen as a threat, 424 00:52:18,800 --> 00:52:23,078 Today, they continue to be shot poisoned and trapped, 425 00:52:23,200 --> 00:52:25,430 which explains why they avoid the crew. 426 00:52:26,640 --> 00:52:30,315 So Dan suggests a new approach. 427 00:52:33,440 --> 00:52:36,193 From the air, they have a better view. 428 00:52:37,320 --> 00:52:41,473 Now they can track the dingoes and follow their trails. 429 00:52:42,640 --> 00:52:47,874 And they notice the white dingo repeatedly returning to the same patch of forest. 430 00:52:49,880 --> 00:52:54,351 Ben, the park ranger, goes to explore... 431 00:52:54,480 --> 00:52:55,993 Dog's had a scratch in here. 432 00:52:58,560 --> 00:52:59,834 Old roo leg. 433 00:52:59,960 --> 00:53:02,793 ...and unearths a den site. 434 00:53:02,920 --> 00:53:04,558 Den site in here. Look at it. Jeez. 435 00:53:04,680 --> 00:53:08,674 Only a handful of wild dingo dens 436 00:53:08,800 --> 00:53:11,314 have ever been filmed, so the team set up a stakeout. 437 00:53:20,480 --> 00:53:23,871 And after a few days waiting... 438 00:53:29,280 --> 00:53:32,511 To the best of my knowledge, this is some of the first footage 439 00:53:32,640 --> 00:53:34,199 of wild dingo pups at the den. 440 00:53:36,480 --> 00:53:40,872 Being able to capture this really intimate, up-close footage is amazing. 441 00:53:41,000 --> 00:53:43,276 Really, really special. 442 00:53:44,720 --> 00:53:47,633 The den site is a major breakthrough. 443 00:53:51,120 --> 00:53:54,078 Now the team can find the white dingo each morning... 444 00:53:54,200 --> 00:53:55,349 Yeah, I've got her. 445 00:53:55,480 --> 00:53:58,791 ...and begin to understand her hunting patterns. 446 00:54:02,200 --> 00:54:05,511 At this point, she's just testing the water to see which... 447 00:54:05,640 --> 00:54:09,679 ...which ones are weaker, or if there are any joeys around that she can hunt easily. 448 00:54:12,200 --> 00:54:16,194 But her chases cover such vast distances 449 00:54:16,320 --> 00:54:20,279 that filming them from start to finish ls impossible. 450 00:54:21,640 --> 00:54:24,837 Time for the final crew members. 451 00:54:28,320 --> 00:54:32,279 With the filming helicopter, 452 00:54:32,400 --> 00:54:37,918 the team can stay airborne for long enough to capture her marathon hunts. 453 00:54:38,040 --> 00:54:43,911 But to be successful, the ground and aerial team will need to work together. 454 00:54:46,480 --> 00:54:48,756 So we've got spotters all around the valley, 455 00:54:48,880 --> 00:54:50,791 and if anything happens, if anything moves, 456 00:54:50,920 --> 00:54:52,115 we can run to the helicopter 457 00:54:52,240 --> 00:54:55,596 and we can be up in the air in about three minutes and filming. 458 00:54:55,720 --> 00:54:59,236 We're just on standby all morning and all afternoon. 459 00:55:02,000 --> 00:55:06,233 With nine people monitoring the white dingo's every move, 460 00:55:06,360 --> 00:55:08,397 all they can do... 461 00:55:09,480 --> 00:55:10,470 ...Is wait. 462 00:55:19,840 --> 00:55:21,877 Until one morning... 463 00:55:22,000 --> 00:55:25,470 She really looks like she's eyeing up those Roos over there. 464 00:55:25,600 --> 00:55:27,318 She's just stopped and just looking at them. 465 00:55:30,600 --> 00:55:34,594 RADIO: Yeah, she's definitely looking for some Roos. Over. 466 00:55:37,320 --> 00:55:39,231 (MUFFLED RADIO MESSAGE) 467 00:55:39,360 --> 00:55:42,398 DAVID: With the dingo on the move, the hunt seems imminent. 468 00:55:46,160 --> 00:55:51,872 As the helicopter prepares to launch, the ground team keep track of her. 469 00:55:59,320 --> 00:56:01,118 Yep, she's running, she's running, she's running. 470 00:56:15,400 --> 00:56:16,799 She looks good. 471 00:56:34,280 --> 00:56:35,759 Finally able to keep up, 472 00:56:35,880 --> 00:56:41,796 the team film these dingoes hunting kangaroos for the first time, 473 00:56:41,920 --> 00:56:46,312 adding to the little we know about these remarkable predators. 474 00:56:49,360 --> 00:56:51,920 After five weeks following the white dingo, 475 00:56:52,040 --> 00:56:55,431 the team are left in awe of her. 476 00:56:55,560 --> 00:56:57,073 She's worked so hard, 477 00:56:57,200 --> 00:57:00,158 catching Roos and looking after her babies, 478 00:57:00,280 --> 00:57:02,669 and it's been just amazing. 479 00:57:03,840 --> 00:57:05,478 I'll never forget it. 480 00:57:09,400 --> 00:57:14,998 Next time - a world transformed by mankind... 481 00:57:16,200 --> 00:57:18,919 ...where extraordinary animals are found... 482 00:57:20,280 --> 00:57:22,999 ...in surprising places. 483 00:57:30,880 --> 00:57:32,200 Europe. 484 00:57:32,320 --> 00:57:33,594 (GRUNTS)