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So far on Life Story, | 0:00:02 | 0:00:04 | |
we have seen animals face the dangers of childhood. | 0:00:04 | 0:00:07 | |
Watched them enter the adult world. | 0:00:16 | 0:00:19 | |
Now, young animals need to find a home. | 0:00:22 | 0:00:25 | |
Somewhere they can find the necessities of life. | 0:00:27 | 0:00:30 | |
It can be a refuge from enemies. | 0:00:36 | 0:00:38 | |
And a shelter from the elements. | 0:00:40 | 0:00:42 | |
Without a place of its own, | 0:00:44 | 0:00:46 | |
an animal will struggle to survive. | 0:00:46 | 0:00:48 | |
On the vast plains of Zambia, | 0:01:10 | 0:01:12 | |
this isolated thicket is a rare patch of cover. | 0:01:12 | 0:01:17 | |
It's home to a pack of hunting dogs. | 0:01:20 | 0:01:22 | |
The arrival of a dozen tiny pups | 0:01:26 | 0:01:29 | |
means the pack have, for now, given up their nomadic lifestyle. | 0:01:29 | 0:01:33 | |
Here, they can hide the youngsters out of sight of their many enemies. | 0:01:35 | 0:01:39 | |
It's the dry season and food is scarce. | 0:01:42 | 0:01:46 | |
Whenever the pack leaves on a hunting trip, | 0:01:51 | 0:01:54 | |
one dog stays behind as baby-sitter. | 0:01:54 | 0:01:56 | |
If danger threatens, the pack's future will depend on this dog. | 0:02:01 | 0:02:06 | |
An eight-foot-long rock python is hunting. | 0:02:24 | 0:02:27 | |
It can easily grab a pup, if it can launch a surprise attack. | 0:02:35 | 0:02:39 | |
DOG BARKS | 0:02:39 | 0:02:42 | |
The adult has spotted it. | 0:02:46 | 0:02:48 | |
His attempts to drive it away have the worst possible outcome. | 0:02:58 | 0:03:02 | |
It retreats down the pup's burrow. | 0:03:05 | 0:03:08 | |
Now, the adult faces a critical choice. | 0:03:12 | 0:03:16 | |
Stay put and risk living with a predator, | 0:03:16 | 0:03:19 | |
or try to find a new shelter in the few hours before nightfall. | 0:03:19 | 0:03:23 | |
That would mean leading the pups into the open. | 0:03:28 | 0:03:31 | |
The baby-sitter makes his choice. | 0:03:49 | 0:03:52 | |
Unfortunately, these plains are home to hyena. | 0:04:10 | 0:04:15 | |
They are the hunting dogs' greatest enemy. | 0:04:23 | 0:04:27 | |
A hyena will take a straggling pup if it gets the chance. | 0:04:44 | 0:04:50 | |
It might win a battle over a pup with a lone baby-sitter. | 0:05:04 | 0:05:08 | |
But the rest of the dog pack, returning from the hunt, | 0:05:13 | 0:05:16 | |
is a different matter. | 0:05:16 | 0:05:17 | |
The hyena will avoid this confrontation. | 0:05:22 | 0:05:25 | |
Back at full strength, the dog pack can now lead the pups | 0:05:36 | 0:05:40 | |
to the safety of a new refuge. | 0:05:40 | 0:05:43 | |
Secure again, | 0:05:49 | 0:05:51 | |
the pups squabble over the meat carried back by the hunting party. | 0:05:51 | 0:05:55 | |
Its duties over, the baby-sitter can take a well-earned rest. | 0:06:03 | 0:06:07 | |
And, in a few weeks, the pups will be old enough to leave the den | 0:06:14 | 0:06:19 | |
and join the pack on the open plains. | 0:06:19 | 0:06:22 | |
In nature, good homes are all too rare. | 0:06:38 | 0:06:41 | |
Here, on a tiny Caribbean island | 0:06:44 | 0:06:47 | |
off the coast of Belize, | 0:06:47 | 0:06:49 | |
there is a severe housing shortage. | 0:06:49 | 0:06:51 | |
Hermit crabs use abandoned seashells as mobile homes. | 0:06:57 | 0:07:01 | |
As a crab grows, its shell becomes an ever tighter fit, | 0:07:05 | 0:07:09 | |
so eventually a crab needs to move in to a bigger one. | 0:07:09 | 0:07:13 | |
Suitable empty shells are few and far between, | 0:07:14 | 0:07:18 | |
and this one is far too spacious for this crab. | 0:07:18 | 0:07:22 | |
But, instead of continuing its search, | 0:07:27 | 0:07:30 | |
this small crab settles down to wait. | 0:07:30 | 0:07:33 | |
Other crabs, also looking to upgrade to a bigger home, | 0:07:43 | 0:07:47 | |
soon gather whenever a shell washes ashore. | 0:07:47 | 0:07:51 | |
Unfortunately, the new shell is too big for them, too. | 0:07:55 | 0:08:00 | |
Despite that, the gathering crabs | 0:08:03 | 0:08:06 | |
begin to measure each other up, | 0:08:06 | 0:08:07 | |
and then they do something really rather extraordinary. | 0:08:07 | 0:08:11 | |
They arrange themselves into an orderly queue. | 0:08:14 | 0:08:18 | |
The biggest at the front, smallest at the back. | 0:08:18 | 0:08:21 | |
They're lining up with one aim - | 0:08:24 | 0:08:26 | |
to exchange properties. | 0:08:26 | 0:08:28 | |
But none of the crabs | 0:08:31 | 0:08:32 | |
can make a move, | 0:08:32 | 0:08:34 | |
because the chain is not yet complete. | 0:08:34 | 0:08:36 | |
They're all waiting for the right sized crab to come along. | 0:08:39 | 0:08:42 | |
And this is it. | 0:08:44 | 0:08:45 | |
The latest arrival pushes to the head of the queue. | 0:08:52 | 0:08:56 | |
At first, the chain falls apart. | 0:08:58 | 0:09:02 | |
As it reforms, the small crab finally makes its move | 0:09:06 | 0:09:12 | |
and takes its place at the end of the line. | 0:09:12 | 0:09:15 | |
After a close inspection, | 0:09:26 | 0:09:28 | |
the big crab moves in. | 0:09:28 | 0:09:30 | |
This triggers a chain-reaction. | 0:09:34 | 0:09:36 | |
Each crab hurriedly moves into the shell | 0:09:38 | 0:09:41 | |
vacated by the crab ahead of it in the line. | 0:09:41 | 0:09:44 | |
Just as the small crab attempts to move into its new home, | 0:09:49 | 0:09:52 | |
a fresh arrival muscles in. | 0:09:52 | 0:09:55 | |
To be left without a shell is a death sentence. | 0:10:09 | 0:10:12 | |
A naked crab will quickly cook under the intense tropical sun. | 0:10:14 | 0:10:18 | |
But, after all the swapping, | 0:10:26 | 0:10:28 | |
there is still one shell left. | 0:10:28 | 0:10:31 | |
Sadly, it's no bigger than this | 0:10:36 | 0:10:38 | |
small crab's original shell, | 0:10:38 | 0:10:40 | |
and worse, it's got a hole in it! | 0:10:40 | 0:10:44 | |
But even a bad shell is better than being homeless. | 0:10:50 | 0:10:54 | |
The small crab's need to upgrade | 0:10:58 | 0:11:00 | |
will be even more urgent | 0:11:00 | 0:11:01 | |
by the time the next shell rolls ashore. | 0:11:01 | 0:11:04 | |
This old wreck off the coast of Fiji | 0:11:13 | 0:11:16 | |
is a gathering place for some very unusual fish. | 0:11:16 | 0:11:20 | |
They're called remoras, but this isn't their home, | 0:11:22 | 0:11:27 | |
it's more of a waiting room. | 0:11:27 | 0:11:29 | |
Like hermit crabs, | 0:11:31 | 0:11:33 | |
each remora is waiting for the perfect residence to appear. | 0:11:33 | 0:11:36 | |
The unique suckers on the back of their heads | 0:11:40 | 0:11:44 | |
hint at a very different and unusual lifestyle. | 0:11:44 | 0:11:47 | |
Up above is a coral reef. | 0:11:51 | 0:11:54 | |
The remoras watch and wait for a particular visitor. | 0:11:57 | 0:12:01 | |
Sharks. | 0:12:03 | 0:12:04 | |
Most fish make themselves scarce when they appear. | 0:12:06 | 0:12:09 | |
But not remoras. | 0:12:13 | 0:12:15 | |
For a remora, home is a bigger fish. | 0:12:19 | 0:12:23 | |
And this is an opportunity not to be missed. | 0:12:23 | 0:12:25 | |
A passing school of eight-foot bull sharks, | 0:12:28 | 0:12:32 | |
one of the most aggressive marine predators. | 0:12:32 | 0:12:35 | |
Remoras stick very close, or even clamp onto their host | 0:12:43 | 0:12:46 | |
with their suckers. | 0:12:46 | 0:12:48 | |
And what fish could offer better protection than a shark? | 0:12:51 | 0:12:55 | |
What's more, when the shark makes a kill, | 0:13:00 | 0:13:03 | |
the remora can scavenge the leftovers. | 0:13:03 | 0:13:05 | |
In return, it helps the shark by eating parasites from its body. | 0:13:08 | 0:13:12 | |
But too many remora could slow a shark down, | 0:13:13 | 0:13:17 | |
so they try to avoid becoming over-loaded. | 0:13:17 | 0:13:21 | |
That means intense competition among remora for the available spaces. | 0:13:23 | 0:13:28 | |
This one has missed out. | 0:13:40 | 0:13:42 | |
Fortunately, sharks aren't the only suitable visitors to this reef. | 0:13:58 | 0:14:03 | |
A giant Manta Ray offers a remora another chance. | 0:14:08 | 0:14:12 | |
It's already sheltering several large remoras. | 0:14:27 | 0:14:31 | |
But there's room for one more on this huge fish. | 0:14:38 | 0:14:43 | |
At last, the remora has a safe home. | 0:14:56 | 0:14:59 | |
But, having made its choice, the remora must now go | 0:15:03 | 0:15:07 | |
wherever the Manta takes it, | 0:15:07 | 0:15:10 | |
for better or worse. | 0:15:10 | 0:15:12 | |
Some animals build their own homes, | 0:15:22 | 0:15:24 | |
and if their lives are filled with danger, | 0:15:24 | 0:15:27 | |
then that home needs to be a fortress. | 0:15:27 | 0:15:30 | |
An Australian weaver ant carries part of her colony's future, | 0:15:35 | 0:15:39 | |
a grub, in her jaws. | 0:15:39 | 0:15:40 | |
She's on her way to help in the construction of her new home. | 0:15:44 | 0:15:48 | |
Hundreds of her fellow workers are labouring together | 0:15:51 | 0:15:54 | |
to build a stronghold out of leaves. | 0:15:54 | 0:15:57 | |
Chains of workers pull leaves together. | 0:16:05 | 0:16:07 | |
They hold them tight, but they need a more permanent fix than this. | 0:16:16 | 0:16:19 | |
The grub-carrier will play a crucial role. | 0:16:25 | 0:16:27 | |
But first, she needs to get across the construction site. | 0:16:30 | 0:16:33 | |
Workers use their own bodies to make living bridges between branches, | 0:16:37 | 0:16:41 | |
allowing others to move quickly around the site. | 0:16:41 | 0:16:44 | |
This worker, with her grub, crosses over. | 0:17:01 | 0:17:03 | |
When this worker reaches a leaf that needs securing, | 0:17:18 | 0:17:21 | |
she taps the grub on its head. | 0:17:21 | 0:17:23 | |
This stimulates it to produce silk. | 0:17:25 | 0:17:27 | |
The worker uses the grub like a glue gun, | 0:17:31 | 0:17:34 | |
passing it backwards and forwards across the join. | 0:17:34 | 0:17:37 | |
Silk is one of the strongest fibres in nature, | 0:17:40 | 0:17:43 | |
yet, it's also flexible, making it the perfect glue | 0:17:43 | 0:17:46 | |
for a construction that must bend and flex in the wind. | 0:17:46 | 0:17:50 | |
After just a few hours of intense effort, the ants' home is complete. | 0:17:58 | 0:18:03 | |
Totally weather-proof, this new nest makes the ideal nursery | 0:18:06 | 0:18:09 | |
in which to start rearing a precious brood. | 0:18:09 | 0:18:12 | |
RAIN PATTERS | 0:18:16 | 0:18:19 | |
But it also needs to be a fortress | 0:18:19 | 0:18:21 | |
because neighbouring ant colonies, | 0:18:21 | 0:18:24 | |
looking to expand their own empires, are always on the attack. | 0:18:24 | 0:18:29 | |
WIND HOWLS | 0:18:34 | 0:18:36 | |
It's rare that a home provides an animal | 0:18:42 | 0:18:44 | |
with everything it needs to survive. | 0:18:44 | 0:18:46 | |
Some are a dangerous compromise. | 0:18:53 | 0:18:56 | |
A sheer rock face in the American Rockies | 0:18:58 | 0:19:01 | |
provides a sure-footed mountain goat with security from attack. | 0:19:01 | 0:19:05 | |
The goats spend the entire winter up here. | 0:19:10 | 0:19:13 | |
But although safe from predators, there's little food. | 0:19:13 | 0:19:16 | |
By the time the spring moult arrives, | 0:19:22 | 0:19:24 | |
their poor diet has left them suffering | 0:19:24 | 0:19:26 | |
from a serious deficiency of vital minerals. | 0:19:26 | 0:19:29 | |
So, every spring, the goats must leave the safety of the cliffs | 0:19:36 | 0:19:40 | |
and make a dangerous, three-day-long descent | 0:19:40 | 0:19:43 | |
on a quest for these precious salts. | 0:19:43 | 0:19:46 | |
While mothers guide the new-born | 0:19:55 | 0:19:57 | |
kids down to the valley, | 0:19:57 | 0:19:59 | |
this newly independent young goat | 0:19:59 | 0:20:00 | |
is making the perilous journey alone for the first time. | 0:20:00 | 0:20:04 | |
The sun's warmth has brought predators out of hibernation. | 0:20:17 | 0:20:21 | |
A grizzly bear. | 0:20:32 | 0:20:34 | |
It's a deadly threat to a young goat. | 0:20:44 | 0:20:47 | |
Luckily, the remains of an earlier casualty catch its attention. | 0:20:55 | 0:20:59 | |
The yearling has to make his way without guidance. | 0:21:13 | 0:21:17 | |
High up, avalanches and rock falls are a hazard. | 0:21:32 | 0:21:36 | |
Lower down, rivers swollen with meltwater | 0:21:43 | 0:21:46 | |
pose the greatest danger. | 0:21:46 | 0:21:48 | |
From experience, mother goats know the safer places to cross. | 0:21:53 | 0:21:57 | |
For her new kid, it is a daunting prospect. | 0:22:22 | 0:22:25 | |
It could easily be swept to its death. | 0:22:35 | 0:22:37 | |
After several days, the lone yearling approaches the crossing. | 0:22:55 | 0:22:59 | |
On the other bank is the only place for miles around | 0:23:01 | 0:23:04 | |
where rocks rich in salt are exposed. | 0:23:04 | 0:23:08 | |
All that stands between the young goat and the outcrop | 0:23:15 | 0:23:19 | |
is a last cascade of bitterly cold water. | 0:23:19 | 0:23:22 | |
It's hard to know where to cross without help. | 0:23:27 | 0:23:30 | |
He's made it. | 0:24:08 | 0:24:10 | |
He'll stay a few days, | 0:24:22 | 0:24:23 | |
stocking up on the salts in this rich dust, | 0:24:23 | 0:24:27 | |
before facing the dangerous return journey | 0:24:27 | 0:24:30 | |
back to the safety of the peaks. | 0:24:30 | 0:24:32 | |
In Zambia, the hunting dog pups | 0:24:45 | 0:24:47 | |
are now four months old | 0:24:47 | 0:24:49 | |
and have left the security of their den far behind. | 0:24:49 | 0:24:53 | |
Once the pups are big enough to keep up, | 0:24:59 | 0:25:02 | |
the dog pack resumes roaming the plains that make up their territory. | 0:25:02 | 0:25:07 | |
In the dry season, being mobile is the only way to find enough food | 0:25:15 | 0:25:19 | |
for 12 hungry youngsters. | 0:25:19 | 0:25:21 | |
Day and night, the dogs rely on each other for protection from enemies. | 0:25:24 | 0:25:30 | |
Hyenas. | 0:25:35 | 0:25:37 | |
The dogs' ancient enemy. | 0:25:37 | 0:25:39 | |
Hyenas are scavengers. | 0:25:43 | 0:25:45 | |
They want to steal the dogs' kill. | 0:25:45 | 0:25:48 | |
One dog cannot take on a hyena. | 0:25:53 | 0:25:57 | |
FURIOUS YAPPING | 0:25:57 | 0:25:58 | |
But what the dogs lack in strength, they make up for with teamwork. | 0:26:00 | 0:26:05 | |
SNARLING AND GROWLING | 0:26:05 | 0:26:08 | |
This isn't just a fight... | 0:26:29 | 0:26:30 | |
HYENA YELPS | 0:26:30 | 0:26:33 | |
..it's part of an age-old battle for control of these plains. | 0:26:33 | 0:26:36 | |
The youngsters join the adults. | 0:26:52 | 0:26:55 | |
With their new strength in numbers, | 0:27:24 | 0:27:26 | |
the battle between dog and hyena is firmly in the dogs' favour. | 0:27:26 | 0:27:30 | |
By sticking together, | 0:27:39 | 0:27:41 | |
the pack can see off the challenge of their archenemy. | 0:27:41 | 0:27:44 | |
For the pups, this fight has demonstrated | 0:27:51 | 0:27:53 | |
the most important rule of hunting-dog life. | 0:27:53 | 0:27:56 | |
Taking control of their home territory, | 0:27:57 | 0:28:00 | |
and, indeed, their very survival, | 0:28:00 | 0:28:03 | |
depends on teamwork. | 0:28:03 | 0:28:05 | |
THUNDER RUMBLES | 0:28:09 | 0:28:12 | |
Now, their home and their lives, are about to change. | 0:28:14 | 0:28:19 | |
The rainy season is arriving, | 0:28:20 | 0:28:23 | |
bringing with it an abundance of prey. | 0:28:23 | 0:28:26 | |
THUNDER RUMBLES | 0:28:26 | 0:28:30 | |
The coming of seasonal riches might seem to promise an easy life. | 0:28:30 | 0:28:35 | |
But not necessarily if you're a pika. | 0:28:39 | 0:28:44 | |
They make their homes at high altitude | 0:28:47 | 0:28:50 | |
on these steep boulder fields. | 0:28:50 | 0:28:52 | |
These slopes in the North American Rockies | 0:28:56 | 0:28:58 | |
are only free from snow for a few months a year. | 0:28:58 | 0:29:01 | |
Pika don't hibernate. | 0:29:08 | 0:29:10 | |
Instead, they cash in on the sudden burst of summer flowers | 0:29:10 | 0:29:14 | |
to stockpile enough food to get them through the winter. | 0:29:14 | 0:29:18 | |
That means cramming thousands of return journeys | 0:29:24 | 0:29:27 | |
between flower, meadow and burrow into just a few hectic weeks. | 0:29:27 | 0:29:32 | |
So, for a pika, a good home is all about location. | 0:29:35 | 0:29:40 | |
Having a burrow near the meadow is a huge advantage. | 0:29:42 | 0:29:45 | |
But not everyone can have a prime spot. | 0:29:45 | 0:29:49 | |
This young female lives high up on the boulder slope. | 0:29:52 | 0:29:55 | |
Every day is a relentless commute. | 0:29:57 | 0:29:59 | |
She could cover hundreds of miles over a single summer. | 0:30:02 | 0:30:05 | |
It's not just exhausting, it's dangerous, too. | 0:30:14 | 0:30:18 | |
A weasel. | 0:30:21 | 0:30:22 | |
Its long, thin body makes it the perfect hunter | 0:30:26 | 0:30:29 | |
in this jumble of boulders. | 0:30:29 | 0:30:31 | |
SQUEAKING | 0:30:31 | 0:30:33 | |
But the pikas have some countermeasures. | 0:30:33 | 0:30:37 | |
IT SQUEAKS | 0:30:37 | 0:30:39 | |
IT SQUEAKS | 0:30:40 | 0:30:41 | |
They call to prevent a surprise attack. | 0:30:44 | 0:30:46 | |
IT SQUEAKS | 0:30:46 | 0:30:48 | |
Faced with such dangers, pikas are always on the lookout | 0:30:52 | 0:30:56 | |
for safer ways to fill their larders. | 0:30:56 | 0:30:59 | |
And they're not above a little petty theft. | 0:31:02 | 0:31:04 | |
The hay piles of the pikas living closer | 0:31:06 | 0:31:08 | |
to the meadow are already bulging with food. | 0:31:08 | 0:31:11 | |
Too tempting to ignore. | 0:31:13 | 0:31:15 | |
She waits until the owner is well away. | 0:31:18 | 0:31:21 | |
And then... | 0:31:24 | 0:31:27 | |
helps herself. | 0:31:27 | 0:31:29 | |
This life of crime will save her time, | 0:31:42 | 0:31:46 | |
energy and reduce the risk from predators. | 0:31:46 | 0:31:49 | |
She stashes the stolen goods, then heads back for more. | 0:31:53 | 0:31:57 | |
Of course, the key to being a successful thief is not to be seen. | 0:32:01 | 0:32:05 | |
But, unfortunately, the owner in the meadow | 0:32:13 | 0:32:17 | |
spots the intruder red-handed. | 0:32:17 | 0:32:19 | |
She carries on while the owner rushes back to confront her. | 0:32:28 | 0:32:32 | |
IT SQUEAKS | 0:32:35 | 0:32:36 | |
She may have made a clean get-away... | 0:32:50 | 0:32:53 | |
..but pikas are not the only thieves operating here. | 0:32:55 | 0:32:58 | |
Bighorn sheep. | 0:33:01 | 0:33:02 | |
Now SHE is the victim. | 0:33:02 | 0:33:05 | |
FRANTIC SQUEAKS | 0:33:05 | 0:33:07 | |
She can call all she likes, but the sheep just keep on eating. | 0:33:08 | 0:33:13 | |
SHE SQUEAKS | 0:33:13 | 0:33:16 | |
For the pika, it's a disaster... | 0:33:18 | 0:33:20 | |
..unless she can quickly replenish her stockpile | 0:33:22 | 0:33:26 | |
in what's left of the short summer. | 0:33:26 | 0:33:28 | |
Back in the Australian rainforest, | 0:33:36 | 0:33:38 | |
this weaver ant fortress sits at the heart of a rich territory. | 0:33:38 | 0:33:43 | |
Hunting parties go out to gather food to fuel their growing numbers. | 0:33:48 | 0:33:53 | |
Some canopy caterpillars are not killed, | 0:34:04 | 0:34:07 | |
but farmed by the ants. | 0:34:07 | 0:34:09 | |
They exude a sugary secretion that the ants collect. | 0:34:09 | 0:34:13 | |
In return, the ants mount a guard | 0:34:14 | 0:34:16 | |
to protect the caterpillar wherever it goes. | 0:34:16 | 0:34:19 | |
But a successful colony inevitably attracts enemies. | 0:34:25 | 0:34:29 | |
This jumping spider's body shape resembles that of an ant. | 0:34:35 | 0:34:41 | |
A disguise good enough to fool these nursery guards. | 0:34:44 | 0:34:48 | |
It's after one of the colony's most valuable assets - | 0:34:54 | 0:34:58 | |
the grubs. | 0:34:58 | 0:34:59 | |
In a colony numbering tens of thousands, | 0:35:02 | 0:35:05 | |
a single grub is an insignificant loss. | 0:35:05 | 0:35:08 | |
But the rich territory of a successful colony | 0:35:11 | 0:35:14 | |
draws more destructive enemies. | 0:35:14 | 0:35:17 | |
Raiders from a neighbouring weaver ant colony | 0:35:25 | 0:35:29 | |
looking to expand their own empire. | 0:35:29 | 0:35:31 | |
Invaders are quickly spotted. | 0:35:43 | 0:35:45 | |
The guard releases pheromones to alert the rest of the colony. | 0:35:49 | 0:35:53 | |
They stream out of the nest to defend their home. | 0:35:56 | 0:35:59 | |
If the home defences fail, | 0:36:16 | 0:36:18 | |
the colony will be wiped out. | 0:36:18 | 0:36:21 | |
Some of the defenders deploy their most potent weapon | 0:36:26 | 0:36:29 | |
they squirt formic acid. | 0:36:29 | 0:36:32 | |
SPLASHING | 0:36:32 | 0:36:34 | |
The stinging liquid halts the invaders in their tracks. | 0:36:38 | 0:36:41 | |
And now, the home guard can go on the offensive. | 0:36:45 | 0:36:49 | |
Home and territory are secure once again. | 0:37:18 | 0:37:21 | |
A colony may lose many workers in defence of its home. | 0:37:23 | 0:37:27 | |
But their sacrifice helps safeguard the next generation. | 0:37:28 | 0:37:32 | |
A colony that can defend a rich territory | 0:37:37 | 0:37:40 | |
has the potential to dominate their part of the rainforest | 0:37:40 | 0:37:44 | |
for years to come. | 0:37:44 | 0:37:45 | |
Such long-term occupation allows residents | 0:37:54 | 0:37:57 | |
to become intimately familiar with their home, | 0:37:57 | 0:38:00 | |
knowledge that is critical when times are tough. | 0:38:00 | 0:38:04 | |
These chimps live on the edge of the Sahara in Senegal. | 0:38:10 | 0:38:13 | |
The dry season has been at its most brutal for four months. | 0:38:17 | 0:38:22 | |
There is almost nothing left to eat. | 0:38:23 | 0:38:26 | |
This young male spends hours teasing apart seed pods. | 0:38:32 | 0:38:36 | |
The fibres surrounding each tiny black seed are inedible. | 0:38:38 | 0:38:43 | |
So, he must delicately separate the one from the other. | 0:38:43 | 0:38:46 | |
Others take the edge off their hunger by chewing tough bean pods. | 0:38:48 | 0:38:51 | |
It's not much to keep the troop going. | 0:38:56 | 0:38:58 | |
And there are many hungry mouths to feed. | 0:39:02 | 0:39:05 | |
Even scarcer than food is water. | 0:39:18 | 0:39:21 | |
If they can't find a supply, these chimps will die. | 0:39:26 | 0:39:30 | |
The troop depends on the older chimps | 0:39:43 | 0:39:45 | |
and their detailed knowledge of their home territory. | 0:39:45 | 0:39:48 | |
They've lived through droughts like this before. | 0:39:49 | 0:39:51 | |
They lead the others on a trek towards a distant river. | 0:39:55 | 0:39:59 | |
It's a hellish ten-mile journey in suffocating 50 degrees heat. | 0:40:06 | 0:40:11 | |
Their march ends on a river bank. | 0:40:36 | 0:40:38 | |
But the channel is bone dry. | 0:40:47 | 0:40:50 | |
Undeterred, this big male picks his spot... | 0:40:53 | 0:40:57 | |
..and starts to dig. | 0:41:02 | 0:41:04 | |
The youngster watching him at work | 0:41:18 | 0:41:20 | |
is absorbing knowledge that could be critical | 0:41:20 | 0:41:22 | |
to the troop's survival in years to come. | 0:41:22 | 0:41:25 | |
Water slowly collects in the hole, | 0:41:31 | 0:41:33 | |
filtered as it seeps through the gravel. | 0:41:33 | 0:41:36 | |
CHIMPS CHATTER QUIETLY | 0:41:44 | 0:41:46 | |
WATER SPLASHES | 0:41:50 | 0:41:52 | |
It's a moment to savour. | 0:41:58 | 0:42:01 | |
All along the riverbed, | 0:42:08 | 0:42:10 | |
others are following the leader's example | 0:42:10 | 0:42:13 | |
and digging their own drinking wells. | 0:42:13 | 0:42:16 | |
ALL CHATTER QUIETLY | 0:42:16 | 0:42:19 | |
By pooling their knowledge and experience, | 0:42:29 | 0:42:32 | |
the chimps have made this hostile place into a home. | 0:42:32 | 0:42:36 | |
HOOFBEATS AND LOWING | 0:42:46 | 0:42:50 | |
Zambia. | 0:42:50 | 0:42:52 | |
The hunting dog pack has survived the hard times of the dry season. | 0:42:52 | 0:42:57 | |
They've exploited different parts of their home territory, | 0:42:57 | 0:43:00 | |
to successfully raise and protect their pups | 0:43:00 | 0:43:04 | |
and they've fought off their greatest rivals. | 0:43:04 | 0:43:08 | |
Now, their home is about to be transformed. | 0:43:10 | 0:43:13 | |
Great herds of wildebeest are arriving, | 0:43:20 | 0:43:23 | |
having followed the rains here | 0:43:23 | 0:43:25 | |
to graze on the new grass, and to calve. | 0:43:25 | 0:43:27 | |
And the pack is ready for them. | 0:43:30 | 0:43:32 | |
Still too young to join a hunt, | 0:43:40 | 0:43:42 | |
the pups have been left at a waterhole... | 0:43:42 | 0:43:45 | |
..while the adults head off over the plains. | 0:43:54 | 0:43:58 | |
The youngsters are already practising their hunting skills. | 0:44:04 | 0:44:07 | |
But they have some way to go. | 0:44:15 | 0:44:17 | |
Not so the adults. | 0:44:24 | 0:44:26 | |
They form a tight pack, stalking to get close to the wildebeest. | 0:44:26 | 0:44:31 | |
THEY WHINE | 0:44:39 | 0:44:42 | |
With the herd on the run, the pack manages to isolate a small group. | 0:44:52 | 0:44:56 | |
They're looking for any weakness. | 0:45:01 | 0:45:03 | |
But the wildebeest are no push-over. | 0:45:16 | 0:45:18 | |
The dogs work in relay. | 0:45:29 | 0:45:31 | |
As one tires, another moves through to take up the running. | 0:45:31 | 0:45:35 | |
Fleeing for its life, the wildebeest has a few tricks of its own. | 0:45:41 | 0:45:45 | |
First, it tries to create confusion by running into a group of zebra. | 0:45:47 | 0:45:52 | |
ZEBRA BRAY | 0:45:52 | 0:45:56 | |
Then it joins forces with other wildebeest | 0:46:05 | 0:46:08 | |
to make a break for the main herd. | 0:46:08 | 0:46:10 | |
Most of the dogs break off to find an easier victim. | 0:46:16 | 0:46:19 | |
But one dog appears to have forgotten the basic pack rule, | 0:46:22 | 0:46:26 | |
stick together. | 0:46:26 | 0:46:28 | |
Suddenly, he hears the pack and switches direction to rejoin them. | 0:46:31 | 0:46:35 | |
THUNDERING HOOTBEATS | 0:46:35 | 0:46:42 | |
And now there is no escape from the power of the pack. | 0:46:47 | 0:46:51 | |
It's time to retrieve the pups | 0:47:38 | 0:47:43 | |
and escort them back to the kill. | 0:47:43 | 0:47:47 | |
The growing pack has less to fear from hyenas than before. | 0:47:49 | 0:47:53 | |
But they will always be a threat. | 0:47:55 | 0:47:58 | |
Some of the older members form a protective cordon | 0:48:00 | 0:48:04 | |
while the rest of the pack feed. | 0:48:04 | 0:48:05 | |
By working together, the pack have overcome | 0:48:14 | 0:48:17 | |
the challenges of this land | 0:48:17 | 0:48:19 | |
and succeeded in making it their home. | 0:48:19 | 0:48:22 | |
Their hard-won territory will be a legacy to their pups | 0:48:28 | 0:48:33 | |
and with luck, for the generations to come. | 0:48:33 | 0:48:37 | |
Finding the perfect location to film hunting dogs | 0:49:02 | 0:49:05 | |
took the Life Story team years of patient research | 0:49:05 | 0:49:09 | |
and finally led them to a remote corner of Zambia. | 0:49:09 | 0:49:12 | |
For director Emma Napper and cameraman Jamie McPherson, | 0:49:17 | 0:49:21 | |
it's a chance to film something few people have ever witnessed - | 0:49:21 | 0:49:25 | |
a complete wild dog hunt. | 0:49:25 | 0:49:27 | |
The dogs usually live in thick bush, | 0:49:29 | 0:49:31 | |
so this open country should help the crew. | 0:49:31 | 0:49:34 | |
And scientists have radio-collared one of the pack | 0:49:35 | 0:49:38 | |
which makes finding them relatively easy. | 0:49:38 | 0:49:40 | |
By that tree, straight there. | 0:49:43 | 0:49:45 | |
-Where are the dogs? -I have absolutely no idea. | 0:49:51 | 0:49:54 | |
Can you see the dogs, Dennis? Where are the dogs? | 0:49:54 | 0:49:57 | |
It's not quite the start the crew was hoping for. | 0:49:57 | 0:50:00 | |
(God, that was quick.) | 0:50:02 | 0:50:04 | |
The dogs disappear into the grass. | 0:50:05 | 0:50:08 | |
Once they've started running, they go as fast as we could go. | 0:50:08 | 0:50:11 | |
And when we go at that speed, | 0:50:11 | 0:50:13 | |
we risk damaging the car and ourselves quite badly, so... | 0:50:13 | 0:50:16 | |
We just need more of a head start than we had this morning, | 0:50:17 | 0:50:20 | |
or jet packs! | 0:50:20 | 0:50:22 | |
Over the following days, it becomes clear | 0:50:24 | 0:50:26 | |
that chasing after the dogs isn't the way forward. | 0:50:26 | 0:50:30 | |
Perhaps trying to get ahead of them during a hunt is a better option. | 0:50:30 | 0:50:34 | |
But that brings its own problems. | 0:50:34 | 0:50:37 | |
It's quite tricky, in that trying to be there when they catch it | 0:50:37 | 0:50:41 | |
is incredibly difficult even when it's completely flat and open, | 0:50:41 | 0:50:45 | |
you still don't know which way they're going to go. | 0:50:45 | 0:50:48 | |
Whenever a chase takes the dogs out of transmitter range, | 0:50:49 | 0:50:53 | |
the crew must spend hours tracking them down again. | 0:50:53 | 0:50:55 | |
Today, they finally catch up with them at a waterhole | 0:51:00 | 0:51:04 | |
and Jamie gets to see a softer side to the pack. | 0:51:04 | 0:51:08 | |
With full stomachs, it's unlikely they will hunt again today. | 0:51:14 | 0:51:18 | |
But there are other animals here that haven't fed...yet. | 0:51:22 | 0:51:26 | |
And hyenas are always on the lookout for an easy meal. | 0:51:34 | 0:51:37 | |
Hopefully, it's just inquisitive. | 0:51:48 | 0:51:50 | |
It could make short work of Jamie if it really wanted to. | 0:51:50 | 0:51:54 | |
(Just let me know if it comes out behind me.) | 0:51:54 | 0:51:57 | |
-Do you think he will eat Jamie? -Yeah. | 0:51:57 | 0:52:00 | |
-He'll eat Jamie? -Yeah, he will. | 0:52:00 | 0:52:03 | |
SHE GIGGLES | 0:52:03 | 0:52:04 | |
Then, as evening approaches, the mood changes. | 0:52:11 | 0:52:16 | |
GROWLING AND SNARLING | 0:52:16 | 0:52:18 | |
YAPPING | 0:52:18 | 0:52:20 | |
Bitter rivals, the dogs don't like the hyenas hanging around | 0:52:20 | 0:52:23 | |
and this one has outstayed its welcome. | 0:52:23 | 0:52:26 | |
Jamie has a ringside seat. | 0:52:28 | 0:52:30 | |
IT GROWLS | 0:52:30 | 0:52:32 | |
DOGS YELP | 0:52:34 | 0:52:36 | |
The crew leaves the dogs to settle down for the night. | 0:52:40 | 0:52:43 | |
And hope for a change of luck in the morning. | 0:52:48 | 0:52:50 | |
But when they return, the pack is nowhere to be found. | 0:52:58 | 0:53:02 | |
Perhaps the hyena came back during the night and they have moved off. | 0:53:04 | 0:53:08 | |
You can only pick them up if you're within 2km of them | 0:53:08 | 0:53:11 | |
and they tend to move. | 0:53:11 | 0:53:13 | |
They can, they have moved 10km in a night | 0:53:13 | 0:53:16 | |
so, hopefully, they're moving the same way we're searching. | 0:53:16 | 0:53:20 | |
If they've gone the opposite direction, | 0:53:20 | 0:53:22 | |
then, yeah...we could be miles from them! | 0:53:22 | 0:53:24 | |
-Do you think that maybe they went south? -Maybe. | 0:53:28 | 0:53:31 | |
And in the park's 1,300 square miles, | 0:53:33 | 0:53:37 | |
it's like looking for a needle in a haystack. | 0:53:37 | 0:53:39 | |
We've been looking for them since about 4 o'clock this morning. | 0:53:39 | 0:53:42 | |
It's now half past five in the afternoon. | 0:53:42 | 0:53:45 | |
Sun sets in about an hour. | 0:53:45 | 0:53:48 | |
So, we've got about an hour to find them, really, | 0:53:48 | 0:53:50 | |
because they're likely to get up again at sunset and move again. | 0:53:50 | 0:53:54 | |
We don't know where they are now, so it's just going to get harder. | 0:53:54 | 0:53:57 | |
So, the sooner we find them, the better. | 0:53:57 | 0:53:59 | |
You say you have located the dogs? Confirm. Over. | 0:53:59 | 0:54:02 | |
INDISTINCT TRANSMISSION | 0:54:02 | 0:54:04 | |
Where is that? | 0:54:06 | 0:54:07 | |
West, on this side. | 0:54:09 | 0:54:12 | |
Doggies! | 0:54:17 | 0:54:18 | |
The crew can't afford to lose them again. | 0:54:23 | 0:54:27 | |
The only option is to stay as close as possible all through the night. | 0:54:27 | 0:54:33 | |
BEEPING | 0:54:33 | 0:54:34 | |
How close are they, Dennis? | 0:54:34 | 0:54:36 | |
Less than a kilometre. | 0:54:36 | 0:54:39 | |
In the dark, | 0:54:40 | 0:54:42 | |
the radio transmitter helps the team keep tabs on the dogs. | 0:54:42 | 0:54:46 | |
It's carrying food in its mouth, but I can't see a carcass. | 0:54:49 | 0:54:52 | |
Let's stop here. | 0:54:53 | 0:54:56 | |
Put the lights off. | 0:54:56 | 0:54:57 | |
And their luck holds. | 0:55:02 | 0:55:04 | |
Dawn breaks and the crew is close by as the dogs begin the hunt. | 0:55:09 | 0:55:13 | |
The crew is finally on the spot as the dogs move in for the kill. | 0:55:36 | 0:55:40 | |
But to complete the story, the crew needs to cover an actual chase | 0:55:42 | 0:55:46 | |
and to do that, they will have to take to the air. | 0:55:46 | 0:55:50 | |
This aerial view reveals the strategy the dogs use | 0:56:04 | 0:56:07 | |
during the pursuit and their incredible endurance and skill. | 0:56:07 | 0:56:11 | |
From the ground you never see that point | 0:56:13 | 0:56:15 | |
when the dogs swap over and another one takes over | 0:56:15 | 0:56:18 | |
and 4 or 5km of different elements of it. | 0:56:18 | 0:56:21 | |
Just to be able to see it and keep up with it, | 0:56:21 | 0:56:23 | |
there's no way you could keep up with that on the ground. | 0:56:23 | 0:56:26 | |
It was over termite mounds and really rough stuff, so... | 0:56:26 | 0:56:28 | |
Yeah, it was a good morning. | 0:56:28 | 0:56:30 | |
These remote plains and this remarkable pack | 0:56:31 | 0:56:34 | |
of hunting dogs have more than lived up to their promise. | 0:56:34 | 0:56:38 | |
A pack of 20 wild dogs hunting, flat-out - there's nothing like it. | 0:56:38 | 0:56:42 | |
It's incredibly exciting, it's an amazing thing to see. | 0:56:42 | 0:56:45 | |
Following this very special pack of dogs has become addictive. | 0:56:51 | 0:56:56 | |
I don't want to go. | 0:56:56 | 0:56:59 | |
Do you think can we wait another hour? Do you think the plane would wait for us? | 0:57:00 | 0:57:04 |