0:00:04 > 0:00:08Brazil. The beating heart of South America.
0:00:12 > 0:00:17Vast landscapes, carved by the irresistible forces of nature.
0:00:30 > 0:00:34More animals live here than in any other nation on Earth.
0:00:46 > 0:00:48This is the story of three of them.
0:00:48 > 0:00:50SQUEAKING
0:00:55 > 0:00:57As the seasons change,
0:00:57 > 0:01:01animal families face extreme challenges.
0:01:01 > 0:01:03THUNDER ROARS
0:01:05 > 0:01:07Immense floods.
0:01:10 > 0:01:12Brutal drought.
0:01:17 > 0:01:19Surviving and raising young.
0:01:19 > 0:01:22LOUD SQUEALS
0:01:22 > 0:01:26Through the good times and the bad...
0:01:26 > 0:01:28SCREECHING
0:01:30 > 0:01:32..this is an intimate journey
0:01:32 > 0:01:35to the heart of a spectacular country.
0:01:49 > 0:01:55The monsoon floods are over and the land is drying out fast.
0:01:55 > 0:01:57CAPUCHIN SQUEAKS
0:01:57 > 0:02:01The baby tufted capuchin has found his place in his group's
0:02:01 > 0:02:03complex society.
0:02:04 > 0:02:08The young coatis have worked out who's friend and who's foe.
0:02:12 > 0:02:15And the otter kits have learned to swim in Brazil's most
0:02:15 > 0:02:17dangerous waters.
0:02:19 > 0:02:22With the youngsters becoming independent,
0:02:22 > 0:02:25their parents are thinking about the next generation.
0:02:27 > 0:02:31But finding a mate won't be easy.
0:02:31 > 0:02:35They're about to be faced with Brazil's harshest season...
0:02:36 > 0:02:39..drought and fire.
0:02:55 > 0:02:58INSECTS BUZZ
0:03:02 > 0:03:09This is the hottest, driest part of Brazil - northeast Piaui.
0:03:13 > 0:03:18The temperature here exceeds 40 degrees centigrade.
0:03:18 > 0:03:21It hasn't rained for months.
0:03:21 > 0:03:24PERSISTENT STONE CRACKING
0:03:30 > 0:03:33CRACKING CONTINUES
0:03:38 > 0:03:42These canyons are home to a group of tufted capuchin monkeys.
0:03:42 > 0:03:44SCREECHING
0:03:53 > 0:03:55The young ones are growing up fast.
0:04:00 > 0:04:04This female no longer has a baby to look after,
0:04:04 > 0:04:07and her biological clock has started ticking again.
0:04:11 > 0:04:14CHIRPING
0:04:17 > 0:04:22In her eyes, her perfect partner is the dominant male.
0:04:28 > 0:04:30He's strong and healthy,
0:04:30 > 0:04:34and he's been head of this troop for five years.
0:04:42 > 0:04:46Soon she'll be ready to mate, but she's chosen
0:04:46 > 0:04:50just about the toughest time of year to start courting him.
0:04:53 > 0:04:57It's not easy living here at any time of year,
0:04:57 > 0:05:03but in the dry season, finding food is incredibly hard.
0:05:09 > 0:05:13The only reason these monkeys can survive here at all is
0:05:13 > 0:05:16because they've worked out how to use tools.
0:05:19 > 0:05:23Even so, they must spend a lot of their time foraging.
0:05:25 > 0:05:27It takes a lot of practice.
0:05:33 > 0:05:37Capuchin females need to give birth when there's more food around,
0:05:37 > 0:05:40in the wet season.
0:05:40 > 0:05:42To do that, she needs to mate now.
0:05:46 > 0:05:47Timing is everything.
0:05:50 > 0:05:54Unfortunately, he doesn't share her enthusiasm.
0:06:10 > 0:06:13Female capuchins have to be persistent.
0:06:18 > 0:06:22She tries to seduce him.
0:06:24 > 0:06:27But he's playing hard to get.
0:06:27 > 0:06:29CHIRPING
0:06:29 > 0:06:31FEMALE CAPUCHIN SQUEAKS
0:06:31 > 0:06:33MALE CAPUCHIN HISSES
0:06:40 > 0:06:42MALE HISSES
0:06:45 > 0:06:49He's got all the time in the world.
0:06:49 > 0:06:51She doesn't.
0:06:51 > 0:06:55She'll have to do more to impress him, and soon.
0:06:59 > 0:07:00Meanwhile,
0:07:00 > 0:07:04her world grows hotter
0:07:04 > 0:07:05and drier.
0:07:15 > 0:07:17Hundreds of miles to the southwest,
0:07:17 > 0:07:20whole landscapes are changing dramatically.
0:07:27 > 0:07:28A few months ago,
0:07:28 > 0:07:31vast floods covered Brazil's Vazantes.
0:07:34 > 0:07:37Now the land is turning to dust.
0:08:07 > 0:08:10BIRDS CALL
0:08:14 > 0:08:17Pools are becoming desperately scarce.
0:08:18 > 0:08:22This tiny water hole is now the only one for miles around.
0:08:28 > 0:08:31It's a lifeline for many creatures,
0:08:31 > 0:08:33including this family of coatis.
0:08:39 > 0:08:43They survived the flood by taking refuge in the trees.
0:08:45 > 0:08:49Now they face a long trek, every day, just to get a drink.
0:08:59 > 0:09:01This group's largest coati
0:09:01 > 0:09:02is a dark male.
0:09:05 > 0:09:08But he's just a guest in this all-female group.
0:09:09 > 0:09:12He's come here to find a mate.
0:09:31 > 0:09:33Their youngsters are almost fully grown.
0:09:33 > 0:09:37So this male knows that the females will soon be ready to breed.
0:09:43 > 0:09:46Just like the capuchins, for the coatis,
0:09:46 > 0:09:49the dry season is all about courtship.
0:09:51 > 0:09:53The females must conceive now,
0:09:53 > 0:09:56so their babies are born with the rains.
0:10:06 > 0:10:09But right now they don't seem to be in any hurry.
0:10:13 > 0:10:16And even the male seems happy enough to wait.
0:10:22 > 0:10:24But there's trouble ahead.
0:10:26 > 0:10:27A rival male.
0:10:32 > 0:10:37He's not attached to any group at the moment, but he'd like to be.
0:10:55 > 0:10:57If the dark male wants to stay here,
0:10:57 > 0:11:00he may have to fight for it.
0:11:11 > 0:11:13He sizes up his rival.
0:11:23 > 0:11:25Male coatis pack a serious set of teeth.
0:11:29 > 0:11:33And the intruder makes himself bigger by bristling up his fur.
0:11:38 > 0:11:39He means business.
0:11:54 > 0:11:56HE has nothing to lose.
0:12:00 > 0:12:03The dark male has a simple choice,
0:12:03 > 0:12:06stay and fight or walk away.
0:12:16 > 0:12:18He's lost his females.
0:12:21 > 0:12:25If he wants to be a father this year, he'll have to win them back.
0:12:27 > 0:12:28And soon he'll be out of time.
0:12:29 > 0:12:32The dry season is almost at its peak.
0:12:48 > 0:12:50The tropical sun bakes the land.
0:12:51 > 0:12:55What few clouds remain offer no chance of rain.
0:13:00 > 0:13:02And with no rain to feed the rivers,
0:13:02 > 0:13:04the Pantanal,
0:13:04 > 0:13:08the largest freshwater wetland on the planet, is starting to dry out.
0:13:31 > 0:13:34The flood season seems like a distant memory.
0:13:37 > 0:13:41At this time of year, keeping cool is a real problem.
0:13:55 > 0:13:59At over 100 kilos, almost as big as a lion,
0:13:59 > 0:14:03this male jaguar feels the heat more than most.
0:14:29 > 0:14:31In the coming weeks, he too must find a mate.
0:14:33 > 0:14:38But for now, he can't even find a bit of peace in the shade.
0:14:38 > 0:14:41OTTERS CRY
0:15:01 > 0:15:04This giant otter family are noisy neighbours
0:15:04 > 0:15:08and fiercely protective of their favourite sandbanks.
0:15:18 > 0:15:22Unlike jaguars, the parents of this young otter
0:15:22 > 0:15:24aren't thinking about mating,
0:15:24 > 0:15:27they've still got some more parenting to do.
0:15:31 > 0:15:33Soon it'll be time for this one
0:15:33 > 0:15:35to learn how to catch her own fish.
0:15:52 > 0:15:54Her mother's milk is running dry.
0:15:56 > 0:15:59So now, when the rest of the family bring fish back to the holt,
0:15:59 > 0:16:02she's determined to grab a piece for herself.
0:16:17 > 0:16:20Getting fish from the adults is easy.
0:16:21 > 0:16:24Keeping it from her siblings is much trickier.
0:16:26 > 0:16:29THEY SQUEAL
0:17:00 > 0:17:03Fights like this aren't just about food.
0:17:11 > 0:17:13Giant otters live in large families.
0:17:13 > 0:17:15This will help establish their position
0:17:15 > 0:17:17in the group's pecking order.
0:17:25 > 0:17:26Oh, dear.
0:17:40 > 0:17:43Mother's milk won't be enough for much longer.
0:17:44 > 0:17:47The sooner she can catch her own fish, the better.
0:17:54 > 0:17:56The dropping water levels
0:17:56 > 0:17:58mean fishing should become easier for the otters.
0:18:04 > 0:18:05But for the jaguars,
0:18:05 > 0:18:07it makes life harder.
0:18:12 > 0:18:15This male is now searching for a mate.
0:18:25 > 0:18:29Scent marks tell him if any receptive females have been here.
0:18:32 > 0:18:35What he can't tell is where to find them.
0:18:43 > 0:18:46A female's territory can stretch for 50 square kilometres.
0:18:49 > 0:18:52And the falling water levels mean that with every passing day,
0:18:52 > 0:18:56he has to cover more and more ground to try and find her.
0:19:15 > 0:19:18As the dry season wears on,
0:19:18 > 0:19:21some of the rivers stop flowing altogether.
0:19:22 > 0:19:26Most of the fish trapped in this pool were snapped up long ago.
0:19:29 > 0:19:31It's a challenging time for caiman.
0:19:33 > 0:19:36This one must have been desperate
0:19:36 > 0:19:37to tackle a porcupine.
0:19:43 > 0:19:46For the animals that live here,
0:19:46 > 0:19:48the pressure is intense.
0:19:49 > 0:19:52But for one creature, this is their moment.
0:20:12 > 0:20:13During the wet season,
0:20:13 > 0:20:18millions of caterpillars grew fat on an abundance of leaves.
0:20:20 > 0:20:22Now they've emerged as hawk moths.
0:20:27 > 0:20:30They'll mate and lay eggs in just a few days.
0:20:32 > 0:20:35But first they must drink,
0:20:35 > 0:20:38and there are very few places left to do that safely.
0:21:00 > 0:21:03More and more moths emerge from the surrounding trees.
0:21:17 > 0:21:18Hatching all together
0:21:18 > 0:21:21means that enough of them will survive to find a mate.
0:21:23 > 0:21:25The females will lay eggs ready to hatch
0:21:25 > 0:21:27when there's plenty of greenery
0:21:27 > 0:21:30for a new generation of caterpillars.
0:22:15 > 0:22:18In the dry canyons of Serra da Capivara,
0:22:18 > 0:22:21all the capuchins are feeling the heat.
0:22:29 > 0:22:34For this female capuchin, things have become even more urgent.
0:22:36 > 0:22:39She has come into oestrus.
0:22:39 > 0:22:43She must mate in the next four days if she wants to have a baby.
0:22:53 > 0:22:55She's now so obsessed,
0:22:55 > 0:22:57that she's barely eating,
0:22:57 > 0:22:58or even drinking.
0:23:02 > 0:23:05That's got to be tough in this heat.
0:23:18 > 0:23:20For the troop's youngest member,
0:23:20 > 0:23:22just finding food is a struggle.
0:23:31 > 0:23:32Even the adults find it hard.
0:23:51 > 0:23:54But these monkeys aren't after food,
0:23:54 > 0:23:56they're after minerals.
0:24:05 > 0:24:10And they get those by licking or even inhaling this dust.
0:24:16 > 0:24:18No-one knows why they do it.
0:24:26 > 0:24:30But this group are probably the smartest monkeys in the world
0:24:30 > 0:24:33and they may be using this for medicinal purposes.
0:24:37 > 0:24:39Quite how they learned to do this is a mystery.
0:24:41 > 0:24:43But capuchins learn by example.
0:24:45 > 0:24:46One monkey starts...
0:24:48 > 0:24:50..and soon they're all doing it.
0:24:55 > 0:24:57But despite their obvious intelligence,
0:24:57 > 0:25:01this male seems incapable of taking a hint.
0:25:09 > 0:25:14Males of most species rarely need to be asked more than once.
0:25:17 > 0:25:21But no matter what she tries,
0:25:21 > 0:25:23she just can't get his attention.
0:25:35 > 0:25:38She has just days to change his mind.
0:25:53 > 0:25:56Drought tightens its grip across the country.
0:25:58 > 0:26:01The Pantanal's rivers shrink further in the baking sun.
0:26:12 > 0:26:15Silt from the last floods dries into dust.
0:26:31 > 0:26:34The sand is almost too hot to walk on.
0:26:39 > 0:26:41Even the caiman take cover in the shade.
0:26:54 > 0:26:56This male jaguar can't rest.
0:26:56 > 0:27:00He has too much ground to cover in his search for a mate.
0:27:08 > 0:27:10With so little water left,
0:27:10 > 0:27:14the chances are that any females will be somewhere along this river.
0:27:16 > 0:27:18And although he doesn't realise it,
0:27:18 > 0:27:20there is a female,
0:27:20 > 0:27:22just a few miles away.
0:27:30 > 0:27:33She too has a one-track mind,
0:27:33 > 0:27:35but food is what she's after.
0:27:37 > 0:27:39Like many of the Pantanal's jaguars,
0:27:39 > 0:27:42she specialises in hunting caiman
0:27:42 > 0:27:46which is why adults will flee at the first sight of a jaguar.
0:28:03 > 0:28:06But baby caiman have yet to learn this.
0:28:10 > 0:28:11At this time of year
0:28:11 > 0:28:14they're hiding in the nooks and crannies of the exposed banks.
0:28:16 > 0:28:19Easy pickings, IF she can dig one out.
0:28:31 > 0:28:35They may not be much of a meal, but they're easier to catch
0:28:35 > 0:28:37and she needs all the food she can get.
0:28:56 > 0:29:00That's a lot of work for a little caiman.
0:29:00 > 0:29:03She'll need plenty more if she's to breed successfully.
0:29:09 > 0:29:12The lower water level should make our baby otters' lives easier.
0:29:18 > 0:29:22After all, less water should make fish easier to catch.
0:29:26 > 0:29:30But less water means more mud.
0:29:30 > 0:29:32And that makes fish hard to see.
0:29:39 > 0:29:42She must learn to use her whiskers instead.
0:29:49 > 0:29:51It could take a while to get the hang of it.
0:29:57 > 0:29:59The adults make it look easy.
0:30:07 > 0:30:10But the days of free hand-outs are over.
0:30:25 > 0:30:28Perhaps temptation will encourage her to hunt.
0:30:51 > 0:30:55There are over 200 species of fish in these rivers,
0:30:55 > 0:30:57she just needs to catch one of them.
0:31:19 > 0:31:20Her mother keeps a close eye.
0:31:30 > 0:31:31Success.
0:31:42 > 0:31:44It's an important moment -
0:31:44 > 0:31:47one of her final steps towards adulthood.
0:31:56 > 0:31:59Her parents' duties are almost done.
0:32:02 > 0:32:06Soon her mother will turn her attentions back to her partner
0:32:06 > 0:32:09and will look to expand the family once more.
0:32:17 > 0:32:20For now, the drought intensifies.
0:32:23 > 0:32:27In the Vazantes, all the water holes have dried up.
0:32:43 > 0:32:46Life for many animals would be impossible
0:32:46 > 0:32:48were it not for one special tree.
0:32:51 > 0:32:53Even in the toughest drought,
0:32:53 > 0:32:56acuri palms produce an abundance of fruit.
0:33:06 > 0:33:09And it's not just coatis enjoying the feast.
0:33:16 > 0:33:19But this male coati isn't interested in food.
0:33:21 > 0:33:23He really wants to mate.
0:33:29 > 0:33:31Having lost a fight to a rival,
0:33:31 > 0:33:34he's no longer allowed anywhere near the females.
0:33:39 > 0:33:43The chances of him breeding at all this year are getting slimmer.
0:33:51 > 0:33:55For the intruder, things look very different.
0:33:55 > 0:33:58He now has access to lots of females.
0:34:11 > 0:34:14But for them, mating can be a painful affair.
0:34:16 > 0:34:19And if the male's too rough, he's swiftly punished.
0:34:45 > 0:34:48The females have pushed the intruder away.
0:34:48 > 0:34:52This could be the chance the dark male has been waiting for.
0:35:14 > 0:35:17Now HE's the one who has nothing to lose.
0:35:46 > 0:35:49But if he thought his rival would just give up, he's mistaken.
0:35:57 > 0:35:59A standoff,
0:35:59 > 0:36:01again.
0:36:03 > 0:36:05With everything to play for.
0:36:38 > 0:36:42The fight has cost the dark male a nasty cut on his nose.
0:36:43 > 0:36:46But he's won back the affection of his females,
0:36:46 > 0:36:49and the chance to father a new generation.
0:37:09 > 0:37:13As the days pass, the temperature rises further.
0:37:13 > 0:37:18In some places, the land is now becoming dangerously dry.
0:37:29 > 0:37:34Almost a quarter of this vast country is covered in savanna.
0:37:35 > 0:37:42Two million square kilometres of grassland, the Brazilian Cerrado.
0:37:56 > 0:37:58It's one of the oldest and most diverse
0:37:58 > 0:38:01tropical ecosystems on the planet.
0:38:05 > 0:38:07A third of all Brazilian species live here.
0:38:26 > 0:38:30Drought has dried these grasses to a crisp.
0:38:32 > 0:38:36Now this entire landscape is a tinderbox.
0:38:47 > 0:38:48All of the animals here
0:38:48 > 0:38:51are adapted to survive in these harsh conditions.
0:38:54 > 0:38:58But there's one force of nature that no creature can survive.
0:39:13 > 0:39:16Thunderstorms can create lightning without rain.
0:39:17 > 0:39:19One strike is all it takes.
0:39:56 > 0:39:58At the height of the dry season,
0:39:58 > 0:40:01hundreds of fires a day may burn across Brazil.
0:40:30 > 0:40:32Once they've started,
0:40:32 > 0:40:36these fires can take on a momentum all of their own.
0:41:32 > 0:41:35Slowly, the animals return.
0:41:36 > 0:41:39But their home has been turned to ash.
0:42:05 > 0:42:07They've survived the fire,
0:42:07 > 0:42:10but how long can they survive now?
0:42:54 > 0:42:56At the height of the fire season,
0:42:56 > 0:42:59much of Brazil wakes to blood-red skies.
0:43:07 > 0:43:12Landscapes hundreds of kilometres away are bathed in eerie light.
0:43:51 > 0:43:54The Pantanal has escaped the flames,
0:43:54 > 0:43:59but here most of the rivers are now barely recognisable.
0:44:10 > 0:44:13It's at this toughest time of the year
0:44:13 > 0:44:17that the female jaguar is ready for mating.
0:44:40 > 0:44:43Finally, the male's search is over.
0:45:14 > 0:45:17They'll mate repeatedly over the next few days.
0:45:39 > 0:45:43Until recently, jaguars were thought of as solitary,
0:45:43 > 0:45:45only ever getting together briefly.
0:45:48 > 0:45:50But the jaguars in the Pantanal
0:45:50 > 0:45:53are now revealing a different side to these cats.
0:46:01 > 0:46:03This pair may stay together for weeks,
0:46:03 > 0:46:05or even months.
0:46:22 > 0:46:26In the canyon lands, the drought has reached its height.
0:46:31 > 0:46:33It's been four days
0:46:33 > 0:46:37since this female first set eyes on the object of her desire.
0:46:39 > 0:46:41She's been pursuing him relentlessly
0:46:41 > 0:46:44and he's stubbornly ignored her.
0:46:52 > 0:46:56Today, her world has changed.
0:47:10 > 0:47:13At last, he's allowed her to groom him.
0:47:20 > 0:47:21And for the first time,
0:47:21 > 0:47:24her affections are returned.
0:47:53 > 0:47:56They move away from the rest of the troop.
0:47:57 > 0:47:59It's time for a little privacy.
0:48:32 > 0:48:34She is exhausted.
0:48:37 > 0:48:39And he is a changed male.
0:48:53 > 0:48:57This little one won't be the troop's youngest for much longer.
0:49:10 > 0:49:11All of our animal families
0:49:11 > 0:49:14have survived this season of drought and fire.
0:49:16 > 0:49:19Drawing on their resilience, ingenuity
0:49:19 > 0:49:21and teamwork.
0:49:32 > 0:49:36Soon the rains will return
0:49:36 > 0:49:39and with the harsh days of drought over,
0:49:39 > 0:49:41Brazil will burst into life once more.
0:50:06 > 0:50:10This land of extremes has swung from flood to fire,
0:50:10 > 0:50:14and these animals have done more than just survive here.
0:50:16 > 0:50:18They've flourished.
0:50:22 > 0:50:23They've nurtured.
0:50:24 > 0:50:26They've grown.
0:50:29 > 0:50:32And now, a new generation is on its way.
0:50:34 > 0:50:38They too will have to find their way in this extraordinary country.
0:51:12 > 0:51:14Of all Brazil's animal families,
0:51:14 > 0:51:18one in particular captured the hearts of the Wild Brazil team.
0:51:24 > 0:51:29They'd been amazed by the ingenuity of the tufted capuchins.
0:51:29 > 0:51:31But what would happen
0:51:31 > 0:51:33when their intelligence was really put to the test?
0:51:37 > 0:51:40Cameraman Ted Giffords was following the monkey family
0:51:40 > 0:51:42in Serra da Capivara National Park.
0:51:45 > 0:51:47They're usually rather difficult to find.
0:51:47 > 0:51:50So we're driving to find the monkeys and one's just ran across the road.
0:51:50 > 0:51:52That's really funny, so...
0:51:52 > 0:51:53Oh, that's Chica. That's Chica.
0:51:53 > 0:51:57You can recognise her because she has got an amazing quiff.
0:52:05 > 0:52:09Soon everyone followed Chica to explore Ted's car.
0:52:09 > 0:52:12I think this car must be a very strange object to them
0:52:12 > 0:52:14because it's completely smooth and slippery.
0:52:14 > 0:52:16It's fascinating watching their thought process
0:52:16 > 0:52:18because they are sliding around on it and tapping it,
0:52:18 > 0:52:19thinking, "Well, what is this?"
0:52:19 > 0:52:22But they know it contains something worth having.
0:52:25 > 0:52:29It's this amazing curiosity towards anything new in their environment
0:52:29 > 0:52:32that primatologist Camila Coelho is using to test
0:52:32 > 0:52:34how capuchins learn new behaviours.
0:52:39 > 0:52:42This is the first time a study like this
0:52:42 > 0:52:45has been tried with wild capuchins anywhere in the world.
0:52:49 > 0:52:51But how would Chica and her family do?
0:52:52 > 0:52:55Chica is trying to get the experiment started
0:52:55 > 0:52:57before we're ready.
0:52:57 > 0:53:01So we have to distract her off somewhere,
0:53:01 > 0:53:04so that I can get it all set and the cameras rolling.
0:53:04 > 0:53:05It's actually quite good
0:53:05 > 0:53:09because it means we have always a keen participant.
0:53:12 > 0:53:15Now at the peak of the dry season,
0:53:15 > 0:53:17the smell of the mango juice in the tubes
0:53:17 > 0:53:19was definitely getting their attention.
0:53:21 > 0:53:24But how would they adapt their foraging techniques to get to it?
0:53:31 > 0:53:32First a "tail drinking" method
0:53:32 > 0:53:34that they use to get water
0:53:34 > 0:53:36hidden deep inside tree holes.
0:53:40 > 0:53:43Teeth that work so well on bark are also great on plastic.
0:53:46 > 0:53:50And the stone tools that crack seeds work even better here.
0:54:00 > 0:54:03But one monkey was inventing a completely new approach.
0:54:11 > 0:54:14She undoes tube number three
0:54:14 > 0:54:16and carries it away.
0:54:18 > 0:54:21Trust Chica to come in and literally steal the show.
0:54:21 > 0:54:23Well, it's a solution.
0:54:23 > 0:54:27Not the one we were hoping for, but...
0:54:27 > 0:54:30They could clearly adapt their behaviour to get new resources.
0:54:30 > 0:54:34But could they learn completely new skills?
0:54:35 > 0:54:37To really getting them thinking,
0:54:37 > 0:54:40Camila had devised something a bit more taxing.
0:54:41 > 0:54:44Enter the monkey-proof box.
0:54:48 > 0:54:52A simple pull of the latch would release the food inside,
0:54:52 > 0:54:56but the capuchins had never seen anything like this before.
0:54:57 > 0:55:00Ted was there to see if they could crack it.
0:55:03 > 0:55:06Rather like investigating Ted's car,
0:55:06 > 0:55:09at first, a quick feel to figure out what it's made of.
0:55:10 > 0:55:12But how to get at what's inside?
0:55:21 > 0:55:23Clever tool use wasn't cracking it.
0:55:35 > 0:55:37The dominant males muscled in.
0:55:37 > 0:55:39Brute force didn't seem to work either.
0:55:44 > 0:55:46No-one could figure it out.
0:55:51 > 0:55:53But one monkey had other ideas.
0:56:01 > 0:56:04Making sure she had the box just to herself,
0:56:04 > 0:56:07Chica tried her own investigation.
0:56:17 > 0:56:19Success at last.
0:56:23 > 0:56:25It wasn't any more difficult
0:56:25 > 0:56:27than what she's used to,
0:56:27 > 0:56:31just different, and that's the point -
0:56:31 > 0:56:33Chica had learnt something new.
0:56:35 > 0:56:37Much to her amazement,
0:56:37 > 0:56:42a lift of the latch delivered the nuts again and again.
0:56:48 > 0:56:51The question now was would she share
0:56:51 > 0:56:53the secret with the others?
0:56:53 > 0:56:56Because she definitely wasn't sharing the nuts.
0:57:02 > 0:57:04As she moved back to the box,
0:57:04 > 0:57:06one youngster was taking a keen interest.
0:57:20 > 0:57:22Chica appeared happy enough
0:57:22 > 0:57:25to reveal the technique to this onlooker.
0:57:25 > 0:57:28He watched carefully and learned.
0:57:37 > 0:57:38The secret was out.
0:57:40 > 0:57:43And then it spread like a craze throughout the group.
0:57:50 > 0:57:53Even the old dogs learnt the new trick.
0:58:02 > 0:58:04It's actually quite funny, how frantic they are.
0:58:04 > 0:58:07They take their handfuls and they run away with handfuls.
0:58:07 > 0:58:09They're like naughty school children running away with food.
0:58:14 > 0:58:16The experiment had worked.
0:58:16 > 0:58:20Camila had seen how new ideas spread throughout the entire group.
0:58:23 > 0:58:25It's all down to the capuchins' winning formula
0:58:25 > 0:58:30of insatiable curiosity and their ability to learn from each other.
0:58:34 > 0:58:37By getting really close to each animal family
0:58:37 > 0:58:40and using the insights of Brazil's top scientists,
0:58:40 > 0:58:43the team were able to give us a truly unique
0:58:43 > 0:58:46and intimate view of life in Wild Brazil.