0:00:02 > 0:00:05My name is Steve Backshall.
0:00:05 > 0:00:08This is my mission to find the Deadly 60!
0:00:10 > 0:00:12Not just animals that are deadly to me,
0:00:12 > 0:00:16but animals that are deadly in their own world.
0:00:18 > 0:00:20My crew and I are exploring the planet.
0:00:20 > 0:00:23And you're coming with me every step of the way!
0:00:30 > 0:00:32This is Uganda, right in the heart of Africa.
0:00:32 > 0:00:36It's a magical wonderland with misty mountains and forest,
0:00:36 > 0:00:39savannah, safaris, it's got the lot!
0:00:40 > 0:00:42Uganda is a small country in East Africa,
0:00:42 > 0:00:45often called the Pearl of Africa for its beauty.
0:00:45 > 0:00:48As for the wildlife, we're looking for the primates.
0:00:48 > 0:00:51In fact, you could say we're tracing the family tree.
0:00:53 > 0:00:58You and I are humans, part of an animal group called the primates.
0:00:58 > 0:01:03I've come to Uganda because this is one of the best places to see
0:01:03 > 0:01:04three of our closest ancestors.
0:01:04 > 0:01:09They're all primates, too, and can all be deadly!
0:01:12 > 0:01:15But to find them, we've got an adventure ahead.
0:01:15 > 0:01:17From gorillas up in the mountains...
0:01:17 > 0:01:23to baboons on the savannah, and chimps in the deep, dark forests.
0:01:25 > 0:01:29We're high in the mountains of a windy, impenetrable park.
0:01:29 > 0:01:32And when I say high, my altimeter says
0:01:32 > 0:01:36we're at 2,300 metres above sea level,
0:01:36 > 0:01:39way higher than the highest mountains in Britain.
0:01:39 > 0:01:41But we could get even higher,
0:01:41 > 0:01:45because the animal we're looking for is a true mountain specialist.
0:01:45 > 0:01:47It's one of the most enchanting, dramatic,
0:01:47 > 0:01:51important animals in the world - it's the mountain gorilla.
0:01:53 > 0:01:55Gorillas are the world's largest primates,
0:01:55 > 0:01:59and some of the most endangered.
0:01:59 > 0:02:01To find them, we're going to need to trek
0:02:01 > 0:02:04high into Uganda's Virunga mountains.
0:02:05 > 0:02:09This cloud forest is cool, wet and at high altitude.
0:02:09 > 0:02:12Any animal that lives here has to be tough.
0:02:12 > 0:02:14They live in close family groups
0:02:14 > 0:02:18and feed on the lush vegetation found on the slopes.
0:02:22 > 0:02:24Our guide, Christopher,
0:02:24 > 0:02:28reckons we will have about four or five hours at least
0:02:28 > 0:02:30until we get close to where the gorillas are.
0:02:30 > 0:02:33Then we'll have the same again coming back.
0:02:33 > 0:02:36So we're looking at a very big day!
0:02:36 > 0:02:40Christopher and the other trackers make daily visits up the mountain
0:02:40 > 0:02:43and know each gorilla family and every individual.
0:02:46 > 0:02:49Without their tracking skills, we'd never find our gorillas.
0:02:49 > 0:02:52Without their knowledge and expertise, the gorillas
0:02:52 > 0:02:54would never let us get close.
0:02:57 > 0:02:59It was about 100 years ago
0:02:59 > 0:03:02that the first outsiders came to these forests
0:03:02 > 0:03:06and saw mountain gorillas for the first time.
0:03:06 > 0:03:09They brought back stories of these terrifying animals,
0:03:09 > 0:03:13incredibly strong and can rip a man apart with their bare hands.
0:03:13 > 0:03:16It's what inspired the story of King Kong.
0:03:16 > 0:03:19Of course, since then, we've learned a lot about mountain gorillas
0:03:19 > 0:03:22and found out they are generally peaceful animals
0:03:22 > 0:03:25that eat stuff like this most of the time.
0:03:25 > 0:03:28That doesn't stop them from being very formidable.
0:03:28 > 0:03:31That's why we're thinking of putting them on Deadly 60.
0:03:37 > 0:03:40For an animal that feeds entirely on vegetation,
0:03:40 > 0:03:42gorillas are one of the most overpowered,
0:03:42 > 0:03:45deadly creatures on the planet.
0:03:45 > 0:03:50They're stacked with huge muscles and have enormous teeth.
0:03:50 > 0:03:53But as they only feed on plants,
0:03:53 > 0:03:56why are they built like an all-in wrestler?
0:03:57 > 0:04:01Well, gorillas are fiercely loyal,
0:04:01 > 0:04:04and will fight to the death to defend their families.
0:04:06 > 0:04:08That can mean big predators like leopards
0:04:08 > 0:04:12and other massive mountain gorillas.
0:04:20 > 0:04:24These mountains aren't just home to giant primates.
0:04:24 > 0:04:29On the path is one of the largest creepy-crawlies I've ever seen.
0:04:29 > 0:04:32That is full-on weird!
0:04:32 > 0:04:36It's a giant earthworm.
0:04:36 > 0:04:38It really is giant!
0:04:40 > 0:04:43These huge tropical earthworms might look freaky,
0:04:43 > 0:04:47but they're really important to keep the mountain soil fertile.
0:04:47 > 0:04:50Good news for our plant-eating gorillas.
0:04:51 > 0:04:54Nobody step on this.
0:04:54 > 0:04:55Step over it.
0:05:02 > 0:05:04We've been trekking for about four hours.
0:05:04 > 0:05:06Everyone's starting to get concerned
0:05:06 > 0:05:10we might not find our gorillas, but, all of a sudden,
0:05:10 > 0:05:12we've found out we're really close to them.
0:05:12 > 0:05:14We'll leave all our food behind,
0:05:14 > 0:05:18leave anything that could be a potential danger to the gorillas,
0:05:18 > 0:05:21and get in and go and meet some mountain gorillas!
0:05:22 > 0:05:26After all that trekking, we only have one hour's visiting time
0:05:26 > 0:05:28with these awesome creatures.
0:05:28 > 0:05:33A strict rule that minimises disturbance to their secret lives.
0:05:36 > 0:05:38As we start to get closer,
0:05:38 > 0:05:43you'll hear the guides making little reassuring noises
0:05:43 > 0:05:47so the gorillas know what's coming, know that it's not a threat.
0:05:47 > 0:05:50I can see the bushes moving ahead of us.
0:05:53 > 0:05:55I'm shaking, half with excitement,
0:05:55 > 0:05:58half with a little bit of trepidation.
0:06:03 > 0:06:05(There, Johnny.)
0:06:06 > 0:06:08(Wow!)
0:06:10 > 0:06:12(Our first sight!)
0:06:12 > 0:06:15They're all around us. A silverback!
0:06:17 > 0:06:22And there's a little baby, an infant hanging on this branch.
0:06:22 > 0:06:24Let's move up this way.
0:06:32 > 0:06:34'It feels quite vulnerable to be so close,
0:06:34 > 0:06:36'knowing that if he wanted to charge,
0:06:36 > 0:06:38'he'd be on me in a heartbeat!'
0:06:41 > 0:06:45It may seem insane to be thinking about putting an animal
0:06:45 > 0:06:50that is so gentle, so careful and a vegetarian on to the Deadly 60,
0:06:50 > 0:06:53until you get a good look at this guy!
0:06:55 > 0:06:58This is the silverback, the dominant male.
0:06:59 > 0:07:01I have to say,
0:07:01 > 0:07:07there are very few more impressive animals in the whole world.
0:07:07 > 0:07:11He is absolutely massive!
0:07:11 > 0:07:15Despite the fact that he probably is no taller than I am,
0:07:15 > 0:07:20he would be at least two times my weight and way more muscular.
0:07:21 > 0:07:25He's just walking across now. You can see that silver saddle back
0:07:25 > 0:07:30as he goes, and just the strength to brush bushes aside.
0:07:33 > 0:07:36Look at that incredible bulk.
0:07:36 > 0:07:39They are majestic animals.
0:07:43 > 0:07:48160 kilos of silverback gorilla just vanish into the undergrowth.
0:07:50 > 0:07:55This is the absolute typical habitat that you'll find gorillas in.
0:07:55 > 0:07:57Very, very thick, very, very dense,
0:07:57 > 0:08:02they spend a great deal of time feeding on everything around us.
0:08:02 > 0:08:06They are surprisingly difficult to spot,
0:08:06 > 0:08:09even though they are very large animals.
0:08:09 > 0:08:10This is a good-sized group.
0:08:10 > 0:08:13Christopher, how many animals are in this group?
0:08:13 > 0:08:15There are 12 individuals.
0:08:15 > 0:08:1812. 12 individuals.
0:08:18 > 0:08:20Four silverbacks,
0:08:20 > 0:08:26- three are females, two blackbacks, one juvenile and two infants.- Right.
0:08:26 > 0:08:28Yeah.
0:08:30 > 0:08:32We try and keep a respectful distance
0:08:32 > 0:08:34so we don't disturb the gorillas as they feed.
0:08:34 > 0:08:39Johnny, Johnny... 'But suddenly a cheeky, confident young male
0:08:39 > 0:08:42'moves menacingly towards us.'
0:08:42 > 0:08:44This is the blackback.
0:08:44 > 0:08:46He's the young male.
0:08:47 > 0:08:49They can be...
0:08:51 > 0:08:53..more of a worry than the silverback
0:08:53 > 0:08:54because they have more to prove.
0:08:54 > 0:08:57Did you see how easily he just pulled
0:08:57 > 0:08:59that tree down to cover himself?
0:08:59 > 0:09:02People who work with gorillas a lot reckon
0:09:02 > 0:09:06they are probably ten times stronger than people.
0:09:06 > 0:09:09They've seen them bend iron bars.
0:09:09 > 0:09:13He's looking at me at the moment, sussing me out.
0:09:13 > 0:09:16But he knows he's far bigger and stronger than me
0:09:16 > 0:09:19and I pose no threat to the group.
0:09:20 > 0:09:24The guides make me stand my ground as he comes in for a closer look.
0:09:34 > 0:09:36Right. Well, that...
0:09:36 > 0:09:38is a blackback gorilla,
0:09:38 > 0:09:41letting us know who's boss!
0:09:49 > 0:09:51Yeah, that was quite a left hook!
0:09:51 > 0:09:54I am glad it didn't go a couple of inches to the right.
0:09:59 > 0:10:02So gorillas can be aggressive when defending their families,
0:10:02 > 0:10:04or when showing off to a film crew!
0:10:04 > 0:10:09But like us humans, they also have a softer side and even share
0:10:09 > 0:10:11some of our worst habits.
0:10:13 > 0:10:16He just picked a bogey out of his eye and ate it!
0:10:17 > 0:10:20And eating all those greens
0:10:20 > 0:10:23gives them really one bad problem that takes some beating.
0:10:23 > 0:10:26PFFRRRT!
0:10:26 > 0:10:27Did you...
0:10:27 > 0:10:32PPFFFFRRRRRRRRRRRRRT!
0:10:35 > 0:10:37Honestly, Nick...
0:10:43 > 0:10:47Despite their comedy manners, mountain gorillas
0:10:47 > 0:10:51are seriously deadly because of their fierce family loyalty.
0:10:53 > 0:10:58That passion for protection can turn a gentle, plant munching vegetarian
0:10:58 > 0:11:01into a chest-beating, rampaging monster!
0:11:02 > 0:11:04But understanding that passion
0:11:04 > 0:11:07and the potential danger these animals pose
0:11:07 > 0:11:09makes it even more special
0:11:09 > 0:11:13to see them up close and look into those very human faces.
0:11:16 > 0:11:19You don't get better animal encounters than this anywhere.
0:11:19 > 0:11:24To be this close to one of the most awe-inspiring
0:11:24 > 0:11:26kings of the jungle, the mountain gorilla.
0:11:26 > 0:11:29They're definitely going on the Deadly 60.
0:11:32 > 0:11:36With a huge muscular frame for crashing through vegetation,
0:11:36 > 0:11:41strong jaws for tearing chunks out of their opponents,
0:11:41 > 0:11:43they'll defend their families to the death.
0:11:45 > 0:11:49Majestic mountain gorillas are going on the Deadly 60.
0:11:52 > 0:11:56Exhausted after our long mountain trek, we hit the road.
0:11:57 > 0:12:02After crossing a furious river on a perilous-looking bridge
0:12:02 > 0:12:06we're stopped in the road by a herd of local longhorn cattle.
0:12:09 > 0:12:13So, er... Why are they called longhorn cattle?
0:12:13 > 0:12:17They can barely hold their heads up, their horns are so heavy!
0:12:17 > 0:12:20Imagine carrying those around all day long!
0:12:20 > 0:12:23But just down the road, we're stopped again.
0:12:23 > 0:12:28And this roadblock is from an animal that could make my list.
0:12:32 > 0:12:35We were heading towards where we're going to spend the night
0:12:35 > 0:12:38when our next Deadly 60 animal has cropped up
0:12:38 > 0:12:40right in the middle of the road ahead of us.
0:12:40 > 0:12:44We're going to pop out and see if we can get better acquainted.
0:12:45 > 0:12:48Go easy, guys.
0:12:50 > 0:12:53Olive baboons should be approached with caution.
0:12:53 > 0:12:56OK, they look quite cuddly and harmless,
0:12:56 > 0:12:58but appearances can be deceptive.
0:13:00 > 0:13:04They're armed with teeth that a vampire would be proud of.
0:13:04 > 0:13:09Each canine tooth is bigger than a lion's,
0:13:09 > 0:13:12and they used them to tear and shred flesh.
0:13:14 > 0:13:18They also have a particular liking for young gazelles,
0:13:18 > 0:13:21which they overwhelm using brute strength and speed.
0:13:24 > 0:13:27They are very bold, brazen animals,
0:13:27 > 0:13:33but they are also animals that we have to be a bit cautious with.
0:13:33 > 0:13:37Because... Well, they're very different
0:13:37 > 0:13:40to the gorillas that were our last Deadly 60 animal.
0:13:40 > 0:13:45The gorillas were very calm, peaceful animals,
0:13:45 > 0:13:48baboons spend a lot of time
0:13:48 > 0:13:51being very aggressive, towards each other and also
0:13:51 > 0:13:55towards anything from the outside they see as a possible threat.
0:13:55 > 0:13:57Oi!
0:13:59 > 0:14:02Olive baboons tend to live in open grasslands with little cover,
0:14:02 > 0:14:06so they form huge groups for their protection.
0:14:09 > 0:14:13This safety in such large numbers gives them a surprising confidence
0:14:13 > 0:14:16to chase off the biggest of predators.
0:14:16 > 0:14:21They'll even face-up to powerful cats, like leopards,
0:14:21 > 0:14:24cheetah, and even lions.
0:14:24 > 0:14:29This cheeky baboon is sending an instant message to deter a lionness.
0:14:29 > 0:14:31It would deter me, too!
0:14:35 > 0:14:37So as I near this troupe,
0:14:37 > 0:14:41the last thing I want to do is make them think I'm a threat.
0:14:41 > 0:14:47Ahead of us on the road, we've got quite a decent-sized group.
0:14:47 > 0:14:50There are probably around 20 animals here,
0:14:50 > 0:14:54but you can get troupes numbering 150 animals.
0:14:58 > 0:15:01There's a couple of youngsters being groomed.
0:15:01 > 0:15:03And over in the back there,
0:15:03 > 0:15:06there's a big male.
0:15:06 > 0:15:10But with so many baboons in a group, squabbles are plentiful.
0:15:10 > 0:15:14THEY SHRIEK
0:15:19 > 0:15:22That is a young male handing out some discipline,
0:15:22 > 0:15:25and it certainly seemed like it hurt!
0:15:25 > 0:15:27That was a terrible screaming.
0:15:27 > 0:15:30There's a lot of stuff like that goes on in baboon society.
0:15:33 > 0:15:37Within such big groups, there's a complex but delicate pecking order.
0:15:40 > 0:15:44Friendships are formed by grooming.
0:15:44 > 0:15:49But fights and squabbles over food and mating rights are common.
0:15:51 > 0:15:54These brutal battles are long and ferocious.
0:15:56 > 0:15:58Sometimes even fatal.
0:16:01 > 0:16:06These baboons are living out in the wild, quite a long way from people,
0:16:06 > 0:16:09so they're quite shy and quite cautious,
0:16:09 > 0:16:11but that isn't always the case.
0:16:11 > 0:16:14In fact, when baboons start to live close to people,
0:16:14 > 0:16:17they can start to see them as a source of food,
0:16:17 > 0:16:19and that can be a real problem.
0:16:19 > 0:16:21You don't want an animal that size,
0:16:21 > 0:16:25with teeth that big deciding it wants food off you.
0:16:26 > 0:16:29Their fearless nature means that baboons will try anything
0:16:29 > 0:16:32for a free meal, raiding bins,
0:16:32 > 0:16:38jumping through windows, even looting breakfast tables!
0:16:38 > 0:16:39And with their bellies full,
0:16:39 > 0:16:43they'll think nothing of getting a free ride home.
0:16:45 > 0:16:48It's this brazen cockiness and opportunistic nature,
0:16:48 > 0:16:51coupled with strength, numbers and a fearsome bite,
0:16:51 > 0:16:55that makes all baboons such dangerous animals,
0:16:55 > 0:16:59and that's why I am putting them on the Deadly 60.
0:17:01 > 0:17:04With vampire-like teeth to tear and shred flesh,
0:17:04 > 0:17:07bold enough to take on the big cats,
0:17:07 > 0:17:11and when it comes to getting a meal, they're smart and savvy.
0:17:11 > 0:17:17Strutting, swaggering, prowling primates, baboons are on my list.
0:17:22 > 0:17:24When you film wildlife for a living,
0:17:24 > 0:17:27you get used to getting up before the sun rises,
0:17:27 > 0:17:31and it doesn't stop us being a bit grumpy about it.
0:17:31 > 0:17:33- How are you feeling, guys?- Grumpy.
0:17:33 > 0:17:36- Exhausted.- Yeah!
0:17:36 > 0:17:38However, we are also very excited,
0:17:38 > 0:17:41because we're heading out to try to find
0:17:41 > 0:17:45the most lethal primate killer found in Uganda's forest.
0:17:45 > 0:17:49It's also our closest relative, and like us, they have big brains,
0:17:49 > 0:17:52they're very intelligent and they can be deadly.
0:17:52 > 0:17:53It's the chimpanzee.
0:17:57 > 0:18:00Chimpanzees are found in forests of central and west Africa.
0:18:00 > 0:18:05They live in family groups of around 30 animals,
0:18:05 > 0:18:08interacting with a variety of calls and facial expressions.
0:18:12 > 0:18:15They have big brains, so they're intelligent.
0:18:15 > 0:18:20But most remarkably, chimps have learnt to use tools.
0:18:22 > 0:18:25Tough forest nuts are cracked open
0:18:25 > 0:18:28with specially selected rocks and logs.
0:18:31 > 0:18:35Some of the skills they use to survive are truly lethal.
0:18:36 > 0:18:39And what they're after will probably shock you.
0:18:39 > 0:18:42Hopefully that's what we'll be able to show you today.
0:18:47 > 0:18:50We've teamed up with expert local trackers
0:18:50 > 0:18:53who are taking us deep into the forest.
0:18:56 > 0:19:00One of our guides reckons there's a tree down here,
0:19:00 > 0:19:04a fig tree, that's in a fruit right now and it's...
0:19:04 > 0:19:06Oh, prints!
0:19:06 > 0:19:07We already have the signs.
0:19:07 > 0:19:12There's some really clear prints, and very fresh as well.
0:19:12 > 0:19:15Those are this morning.
0:19:15 > 0:19:17For sure.
0:19:17 > 0:19:20So they're close!
0:19:22 > 0:19:23Let's go.
0:19:28 > 0:19:32What I was saying before was that there's a fig tree down here
0:19:32 > 0:19:35and it's in fruit at the moment, so this will be a really good place
0:19:35 > 0:19:37to find the chimps.
0:19:45 > 0:19:48'And as we get closer, we find another clue.'
0:19:48 > 0:19:53It's part of a fig, which has been left behind by a chimp.
0:19:54 > 0:19:58It's another good sign, all the signs are pointing this way.
0:19:58 > 0:20:01And then we hear the haunting calls,
0:20:01 > 0:20:04and spot dark shapes up in the branches.
0:20:04 > 0:20:07HOOTING
0:20:07 > 0:20:09Yes, fantastic!
0:20:12 > 0:20:15That is the chimpanzee long call.
0:20:17 > 0:20:20It's just this excited wail that builds and builds.
0:20:20 > 0:20:26We are utterly surrounded, and being pelted from above with figs!
0:20:28 > 0:20:31Up since first light, the chimps are gorging themselves
0:20:31 > 0:20:34on ripe figs for breakfast.
0:20:36 > 0:20:38- Oh, no! - This is what we expect in the forest.
0:20:38 > 0:20:41Was that fig or was that poo?
0:20:41 > 0:20:43- No, it's fig.- No, it wasn't.
0:20:43 > 0:20:46I'm sorry, Ronald, that is not fig.
0:20:46 > 0:20:50That is chimp poo and it just clouted me right in the face.
0:20:50 > 0:20:54I have a feeling this is how our day is going to go.
0:20:54 > 0:20:57THEY LAUGH
0:20:58 > 0:21:00Right, well,
0:21:00 > 0:21:05what I can tell you from looking at this dropping is that at the moment,
0:21:05 > 0:21:08these chimps are feeding almost exclusively on fig.
0:21:08 > 0:21:13It's kind of mushy, it almost looks like a squelched-up fig itself.
0:21:13 > 0:21:15But that isn't always the case.
0:21:15 > 0:21:19In fact, here, less than half of the chimps' diet is made up from fruit.
0:21:19 > 0:21:23What they actually feed on a lot of the time is monkeys,
0:21:23 > 0:21:24and even small antelope.
0:21:24 > 0:21:28'That bit might be worth repeating.'
0:21:30 > 0:21:34What they feed on a lot of the time is monkeys and even small antelope.
0:21:37 > 0:21:40Yes, as shocking as it seems, chimpanzees, just like us,
0:21:40 > 0:21:42have a taste for meat.
0:21:45 > 0:21:49Any small animals that get too close could find themselves on the menu.
0:21:54 > 0:21:57Oh, crikey!
0:21:57 > 0:22:00Do you know, that's not a chimp either, those are monkeys.
0:22:00 > 0:22:02The chimps are going after them!
0:22:02 > 0:22:04No way!
0:22:08 > 0:22:11A couple of monkeys just came into the corner of the tree here,
0:22:11 > 0:22:15and the chimps didn't like it, and just went straight for them.
0:22:15 > 0:22:17The monkeys got away, though.
0:22:17 > 0:22:20They're heading off this side. They got lucky that time.
0:22:20 > 0:22:23At the moment, there are so many figs that the chimps
0:22:23 > 0:22:27don't need to waste the energy in trying to kill the monkeys,
0:22:27 > 0:22:29but if this hadn't been a fruiting fig tree,
0:22:29 > 0:22:31that could have been a different story.
0:22:31 > 0:22:34Chimps are ruthless hunters, and their favourite prey
0:22:34 > 0:22:37are colobus monkeys.
0:22:37 > 0:22:41The leaf-eating monkeys are smaller and more agile than the chimps,
0:22:41 > 0:22:45but they can be cornered and caught when the chimps use
0:22:45 > 0:22:48their team tactics to surround them in the trees.
0:22:51 > 0:22:55Several males will chase the monkeys into an ambush,
0:22:55 > 0:22:59then the hunters gather around to share in the meal.
0:22:59 > 0:23:03This hunting may be gruesome, but the protein from the meat
0:23:03 > 0:23:07is a vital part of the chimps' diet to help fuel those big brains.
0:23:07 > 0:23:11Intelligence and teamwork, now that's deadly!
0:23:18 > 0:23:22This is absolute chaos, and a lot of this is just big squabbles going on
0:23:22 > 0:23:25- between the individuals. - HOOTING
0:23:25 > 0:23:28The senior ones disciplining the more junior ones, and they're just
0:23:28 > 0:23:33charging around in the treetops, causing absolute havoc.
0:23:36 > 0:23:40Branches coming down, figs coming down, poo coming down.
0:23:44 > 0:23:47It's a good job he's got the umbrella!
0:23:49 > 0:23:54'After a few hours of feasting, one of the males has got bored of figs.'
0:23:54 > 0:23:55Here he comes...
0:23:55 > 0:23:57This way.
0:24:00 > 0:24:02He'll come down this vine here.
0:24:03 > 0:24:05This is an adult male,
0:24:05 > 0:24:07just beginning to descend.
0:24:07 > 0:24:11A big male chimp like this would be
0:24:11 > 0:24:15a fair bit smaller than me, but a lot stronger.
0:24:15 > 0:24:18The arms are proportionally much, much longer,
0:24:18 > 0:24:21great for swinging through the treetops.
0:24:21 > 0:24:24A really powerfully-built animal.
0:24:26 > 0:24:29Although great climbers, chimps are too heavy to swing
0:24:29 > 0:24:32from tree to tree like monkeys, so they come down to the ground
0:24:32 > 0:24:34when they move through the forest.
0:24:34 > 0:24:35Down and off.
0:24:36 > 0:24:38Johnny, Johnny!
0:24:42 > 0:24:44I'd give anything to be able to climb like that!
0:24:48 > 0:24:50They move with such purpose.
0:24:50 > 0:24:54You can see the bulk of him just brought down a great big branch.
0:24:54 > 0:24:57There's more coming down from the treetops here.
0:25:01 > 0:25:06I can't believe they're coming down all around us, what an experience!
0:25:07 > 0:25:11The movement was just extraordinary,
0:25:11 > 0:25:14just hand over hand, down through the tree and off.
0:25:14 > 0:25:17Disappeared. There's still a fair few more to come down.
0:25:17 > 0:25:18Johnny!
0:25:25 > 0:25:28The forest floor and the trees around us are just filled
0:25:28 > 0:25:31with dark shapes, almost like ghosts.
0:25:31 > 0:25:34They kind of move almost with a sort of menace.
0:25:34 > 0:25:37You can certainly see how if you were a black and white
0:25:37 > 0:25:39or red colobus monkey,
0:25:39 > 0:25:42these would be the animals of your worst nightmares.
0:25:44 > 0:25:46Once they're down at our level,
0:25:46 > 0:25:49we get a totally different perspective on them.
0:25:49 > 0:25:52Their mood seems to have changed entirely
0:25:52 > 0:25:55from the boisterous squabbling over fruit...
0:25:55 > 0:25:59to silently stalking the forest floor.
0:26:02 > 0:26:03Look over there.
0:26:07 > 0:26:10There is something weirdly prehistoric
0:26:10 > 0:26:11about this whole experience.
0:26:11 > 0:26:15I just feel like I've been transported back in time.
0:26:18 > 0:26:22Humans and chimps share a common ancestor.
0:26:22 > 0:26:25They're our closest living relatives.
0:26:25 > 0:26:29When you're this close to them, there's so much about appearance,
0:26:29 > 0:26:34about their gestures, their facial signs that's very, very human.
0:26:34 > 0:26:37But there's also
0:26:37 > 0:26:40a lot about our similarities that makes them deadly.
0:26:43 > 0:26:48High-swinging, tool-using, co-operative hunting...
0:26:50 > 0:26:53Chimpanzees are on the Deadly 60.
0:26:58 > 0:27:01Big brains make chimps highly intelligent.
0:27:01 > 0:27:05They use deadly teamwork to hunt in the trees.
0:27:05 > 0:27:10And they're expert tool users, making the most out of forest foods.
0:27:10 > 0:27:15All in all, our closest relatives have to go on the Deadly 60.
0:27:15 > 0:27:19As long as I'm exactly where I am now, I'm safe.
0:27:19 > 0:27:22If I got even a few inches closer, it would be able to bite me.
0:27:22 > 0:27:24Next time on Deadly 60...
0:27:28 > 0:27:30I'm never going to make it!
0:27:45 > 0:27:46Subtitles by Red Bee Media Ltd
0:27:46 > 0:27:48E-mail subtitling@bbc.co.uk