0:00:04 > 0:00:11Borneo. In its heart is a lost world of jungles, mountains and ravines.
0:00:11 > 0:00:15It hides a bewildering variety of wildlife,
0:00:15 > 0:00:19but its forests are disappearing...fast.
0:00:20 > 0:00:25A team of jungle specialists have been exploring and filming this great unknown wilderness.
0:00:25 > 0:00:27Got it!
0:00:31 > 0:00:37They've climbed a mountain to discover a world of bizarre, carnivorous plants...
0:00:37 > 0:00:38Stunning!
0:00:38 > 0:00:41..and tracked down a herd of rare jungle elephants.
0:00:41 > 0:00:43I can't believe how closely we saw them.
0:00:43 > 0:00:49But the really hard part hasn't even started yet.
0:01:06 > 0:01:10The rainforests of Borneo are home to a million species...
0:01:13 > 0:01:17..from the great to the small,
0:01:17 > 0:01:21the weird to the wonderful,
0:01:21 > 0:01:22and from the peaceful
0:01:22 > 0:01:24to the deadly.
0:01:27 > 0:01:32Now, scientists are proposing a giant network of protected areas,
0:01:32 > 0:01:35what they're calling the Heart of Borneo
0:01:35 > 0:01:40and a key part of the jigsaw is this remote canyon called Imbak,
0:01:40 > 0:01:43a giant corridor connecting other nature reserves.
0:01:43 > 0:01:45Here, the expedition has built its base camp.
0:01:45 > 0:01:49Their aim, to track down and identify the animals
0:01:49 > 0:01:54as a first step to conserving it for ever.
0:01:54 > 0:01:58How much is out here that no human eye has ever seen?
0:01:58 > 0:01:59Thousands of species!
0:01:59 > 0:02:02They're reaching the end of the first phase.
0:02:02 > 0:02:05Soon they'll be exploring other endangered regions.
0:02:05 > 0:02:09So, now the pressure is on to find as many species as possible
0:02:09 > 0:02:12in the short time that's left.
0:02:12 > 0:02:17And Steve Backshall doesn't have far to go for his first catch.
0:02:17 > 0:02:19Look at that little beauty.
0:02:19 > 0:02:23One of the most extraordinary things about the Borneo rainforest -
0:02:23 > 0:02:27they have flying lemurs, flying squirrels,
0:02:27 > 0:02:28flying lizards, flying frogs
0:02:28 > 0:02:32and flying geckos, and this is one of those.
0:02:32 > 0:02:36Right, let's put him back where he belongs.
0:02:36 > 0:02:38Go on, fella.
0:02:38 > 0:02:40- He's going.- Wey!
0:02:44 > 0:02:46Wildlife cameraman Gordon Buchanan
0:02:46 > 0:02:51is preparing to enter one of the most bizarre of all jungle habitats.
0:02:51 > 0:02:54My wife told me not to do things like this
0:02:54 > 0:02:55when I told her what I was doing,
0:02:55 > 0:02:59but, hopefully, nothing'll go wrong.
0:02:59 > 0:03:02Is everybody away from the bottom of the tree? Over.
0:03:04 > 0:03:08This tree may look normal, but it's completely hollow.
0:03:09 > 0:03:14It will be a 30-metre descent into the pitch black.
0:03:14 > 0:03:19The things I'm most concerned about - bees would be a bit. I wouldn't like to find bees in there.
0:03:19 > 0:03:24Snakes. There's definitely some bats in there, and quite often,
0:03:24 > 0:03:27where you find bats, you find snakes that prey on bats.
0:03:27 > 0:03:29Ready to go.
0:03:45 > 0:03:48The massive tree was hollowed out by these tiny creatures -
0:03:48 > 0:03:50termites,
0:03:50 > 0:03:53the world's most voracious consumers of wood.
0:03:53 > 0:03:58Individually, they can carry just 1,000th of a gram.
0:03:58 > 0:04:01Together, they can fell forest giants.
0:04:12 > 0:04:13Start lowering.
0:04:13 > 0:04:17One big awkward bit here I need to get past.
0:04:17 > 0:04:21Inch by inch, he drops into the crumbling tree trunk.
0:04:21 > 0:04:24Oh, stop, stop, stop.
0:04:26 > 0:04:29This tree's definitely on its way out.
0:04:29 > 0:04:32A good storm could easily take this down,
0:04:32 > 0:04:38but it's incredible cos at this stage it does give a home for all sorts of different creatures living in it.
0:04:41 > 0:04:43Got a gecko here.
0:04:45 > 0:04:47Back at base camp, there's a medical emergency.
0:04:47 > 0:04:51..Left alone for a bite, may have very serious consequences.
0:04:51 > 0:04:56A snake has bitten expedition naturalist Cede Prudente.
0:04:56 > 0:04:58- How serious is that? - I don't know.
0:04:58 > 0:05:00- It's an elapid. - How long do they live?
0:05:00 > 0:05:03Which means it's in the same family as the cobra.
0:05:03 > 0:05:04It's a banded coral snake,
0:05:04 > 0:05:09the smallest of the cobras, but with a huge venom gland.
0:05:09 > 0:05:11It can kill in just one hour.
0:05:11 > 0:05:17What isn't sure is whether the bite has pierced the skin and the venom entered the bloodstream.
0:05:17 > 0:05:20And I tried to press and get the blood out, but there was no blood.
0:05:20 > 0:05:22The venom they have is neurotoxic.
0:05:22 > 0:05:28It's vital the ex-army medics keep him as calm as possible.
0:05:28 > 0:05:31- There's no need to be worried yet... - No.- ..at all.- Yeah.
0:05:31 > 0:05:34- There is lots of different factors. - Yeah.
0:05:37 > 0:05:43The medics have to make the decision whether to scramble the emergency helicopter and evacuate him.
0:05:54 > 0:05:57OK, there's a nice craggy bit behind me.
0:05:57 > 0:06:00That's where I'd expect to see a snake.
0:06:02 > 0:06:05There's an old woodpecker's hole here.
0:06:08 > 0:06:11Seeing it from the woodpecker's perspective.
0:06:11 > 0:06:12Lots of termites.
0:06:15 > 0:06:20These termites have probably been eating this tree for 400 years,
0:06:20 > 0:06:23and these bats,
0:06:23 > 0:06:26they've probably spent their whole life living in here
0:06:26 > 0:06:30cos it's a nice, warm, safe environment for them...
0:06:30 > 0:06:35until some Scotsman starts climbing down the middle.
0:06:37 > 0:06:4260 minutes has gone by and Cede has had extensive tests,
0:06:42 > 0:06:46but it's becoming apparent the fangs didn't penetrate his skin.
0:06:46 > 0:06:50Touch my finger and your nose. And touch my finger. Fantastic.
0:06:50 > 0:06:53I don't think that you've been venomated.
0:06:53 > 0:06:57I don't think that has actually managed to hit you properly.
0:06:57 > 0:07:01That's a juvenile, is it? You probably know a lot more about these than I do.
0:07:01 > 0:07:02- Very young.- Yeah.
0:07:02 > 0:07:04You're actually getting better, mate.
0:07:04 > 0:07:07The venom hasn't entered Cede's bloodstream.
0:07:07 > 0:07:09He's lucky to be alive.
0:07:12 > 0:07:15Somewhere in the middle of this tree,
0:07:15 > 0:07:19Gordon is struggling in 40 degrees centigrade and 100% humidity.
0:07:19 > 0:07:22But down here, these buttress roots go all the way in.
0:07:22 > 0:07:25That's kind of a great place for things.
0:07:26 > 0:07:29There's a snake! There's a snake in there!
0:07:30 > 0:07:33It's OK. It's just a python.
0:07:33 > 0:07:36He's probably more surprised to see me
0:07:36 > 0:07:38than I am to see him.
0:07:38 > 0:07:41He could spend all his time in here.
0:07:41 > 0:07:45Lots of rodents come and go - he'll eat them. The bats - he could easily
0:07:45 > 0:07:51scale the walls of this tree on the inside and pick off the bats.
0:07:51 > 0:07:57This is well worth all the effort of going up and then coming back down.
0:07:57 > 0:08:00The markings are just beautiful.
0:08:05 > 0:08:11If you really want to understand the rainforest, you have to go high.
0:08:11 > 0:08:15For three weeks, camerawoman Justine Evans has spent every day
0:08:15 > 0:08:19on her precarious perch, searching for the animals of the canopy.
0:08:20 > 0:08:23It's amazing, absolutely amazing being up here.
0:08:23 > 0:08:28I've been up here since six, just as it got light.
0:08:28 > 0:08:32And you can hear a group of gibbons calling in the background.
0:08:32 > 0:08:36They've been going on singing for about 20 minutes. It's really long.
0:08:36 > 0:08:40Singing their little hearts out. It's just beautiful.
0:08:41 > 0:08:48She's gained the confidence of this family of gibbons who are now coming very close.
0:08:48 > 0:08:51I've seen one individual, a youngster, a juvenile,
0:08:51 > 0:08:55and he looks like he's got this white cap, so he's quite distinct,
0:08:55 > 0:09:00or she, and also the female, I think,
0:09:00 > 0:09:06is quite dark, and doesn't seem to have much of a white crown, which they usually have.
0:09:06 > 0:09:08There could be a fifth one. Not sure.
0:09:08 > 0:09:11It's difficult when you're trying to film
0:09:11 > 0:09:15and count because you can't keep your eye out on the bigger picture,
0:09:15 > 0:09:20but it looks like we can work this area and just really get to grips with what this group are doing.
0:09:20 > 0:09:23Wow! So good to hear them calling.
0:09:25 > 0:09:31Gibbons feed on the fruits of the rainforest trees and need an unspoilt habitat to survive.
0:09:31 > 0:09:34But now, their home is under threat.
0:09:38 > 0:09:45Each year in Borneo, a million trees are felled and the tropical hardwoods sold around the world.
0:09:49 > 0:09:53The scarred land is then bulldozed to create plantations.
0:09:56 > 0:10:01Oil palm now spreads out as far as the eye can see.
0:10:04 > 0:10:11Without protection, this could be the future of the rainforests of Borneo.
0:10:11 > 0:10:18Steve and environmental scientist Dr Tara Shine are going to explore this most modern of habitats.
0:10:20 > 0:10:22It's just acre upon acre upon acre of them.
0:10:22 > 0:10:25You also have to be a realist about these things.
0:10:25 > 0:10:30Countries have to earn money and people have to have money
0:10:30 > 0:10:32so their kids can go to school
0:10:32 > 0:10:36and governments must provide health care services, so the question for me
0:10:36 > 0:10:40is about making the hard decisions on what areas you look after and what areas you use.
0:10:42 > 0:10:46The palm oil brings in vital foreign exchange,
0:10:46 > 0:10:53but with seven million hectares of rainforest lost already, there's a high price to be paid.
0:10:53 > 0:10:55I'm right in the middle of a palm-oil plantation.
0:10:55 > 0:11:00So, these trees, over a 25-year period,
0:11:00 > 0:11:04produce every few months these nuts, and from these,
0:11:04 > 0:11:07you process them and you produce vegetable oil,
0:11:07 > 0:11:10which is in an awful lot of the food that we eat on a daily basis.
0:11:10 > 0:11:16Any kind of processed foods - cakes, biscuits - probably has a lot of this in it.
0:11:16 > 0:11:19The big difference about being in a palm-oil plantation
0:11:19 > 0:11:21compared to rainforest is that it's so quiet in here.
0:11:21 > 0:11:24When we're in the rainforest, it's really noisy.
0:11:24 > 0:11:29The cicadas are singing, there's birds in the trees. It's that deafening sound of the jungle.
0:11:29 > 0:11:31In here, it's almost eerily quiet.
0:11:37 > 0:11:39Few animals live in these monocultures
0:11:39 > 0:11:42and those that do are unwelcome.
0:11:42 > 0:11:47The fallen nuts bring rats and the rats bring snakes.
0:11:51 > 0:11:57A python has been eating the chickens in this small settlement of oil-palm workers.
0:12:15 > 0:12:17They've seen a big, big snake.
0:12:21 > 0:12:26OK, so it was at a place called Elephant Hill and it was a big snake, apparently.
0:12:26 > 0:12:28OK.
0:12:32 > 0:12:35Under the bridge?
0:12:37 > 0:12:39Help! Help!
0:12:41 > 0:12:44I just told them that I'll go and check it out myself,
0:12:44 > 0:12:48and if they hear me screaming "help", then come running.
0:13:02 > 0:13:04Oh, well, this isn't good.
0:13:04 > 0:13:09The hole is just ahead of me, and it's evidently very, very deep,
0:13:09 > 0:13:12running right underneath the pilings of the bridge.
0:13:12 > 0:13:17No way we can dig it out, no way we can get into it.
0:13:18 > 0:13:20Oh, no! Here it is.
0:13:21 > 0:13:22It's here.
0:13:24 > 0:13:29It's actually got itself sat right underneath the wooden pilings of the bridge.
0:13:29 > 0:13:36And this one here is probably the one that's been taking chickens out the coop from the workers' quarters.
0:13:36 > 0:13:40So, it's going to have to move away, otherwise pretty soon it's going to be for the chop.
0:13:40 > 0:13:45Villagers will kill a snake if they find one.
0:13:45 > 0:13:49A small python will eat their chickens. A large one could eat their children.
0:13:52 > 0:13:57For the sake of the snake, and the villagers, Steve has to try and move it away to a safe place.
0:14:02 > 0:14:04SNAKE HISSES Whoa!
0:14:28 > 0:14:29OK.
0:14:30 > 0:14:35The python's very at home in the water, so, really, this is...
0:14:35 > 0:14:37his environment.
0:14:39 > 0:14:41Once you've got the head,
0:14:41 > 0:14:43you have control of the snake.
0:14:45 > 0:14:47Cor, she's a big 'un!
0:14:48 > 0:14:50Healthy as well.
0:14:50 > 0:14:52Quite thick in the body.
0:14:52 > 0:14:54Agh!
0:14:54 > 0:14:57And very, very strong.
0:14:57 > 0:15:00So, it's just as well she's no longer than three metres.
0:15:00 > 0:15:04If she was bigger, I wouldn't be able to handle her on my own. Look at that!
0:15:04 > 0:15:08Soon, she'll realise she's not going anywhere and she'll quieten down.
0:15:08 > 0:15:12But for the moment, she's trying to constrict my legs. Look at that.
0:15:12 > 0:15:16There's an amazing amount of power being generated into my thigh at the moment.
0:15:16 > 0:15:21It's not surprising that people are worried. She's not big enough to take a kid,
0:15:21 > 0:15:25but even so, that wouldn't stop them taking a machete to her.
0:15:25 > 0:15:27So, I think we have to relocate her.
0:15:27 > 0:15:32We have take her somewhere where she's going to be an awful lot safer, the people as well.
0:15:36 > 0:15:38Ooh! Yuck.
0:15:40 > 0:15:44All right, this is the perfect spot and there's loads and loads
0:15:44 > 0:15:47of potential prey around here. Think you could be pretty happy.
0:15:54 > 0:15:57At base camp it's been raining nonstop.
0:15:57 > 0:16:00Is there any rhyme or reason for any of this?
0:16:02 > 0:16:06It's a setback, there's only three days left before
0:16:06 > 0:16:10they're leaving camp to explore even deeper into the mountains of Borneo.
0:16:26 > 0:16:30It's quite refreshing. Cos it's in flood at the moment it's quite cold.
0:16:30 > 0:16:31So it's a little bit "ahh"
0:16:31 > 0:16:35- when you get in.- Next morning, a break in the weather allows time
0:16:35 > 0:16:40for a quick clean up before the team gets back to searching for animals.
0:16:42 > 0:16:43Ah! Got it!
0:16:43 > 0:16:50They've already tracked down over 100 species but there's more waiting to be discovered.
0:16:50 > 0:16:55All ammunition in the fight to get Imbak canyon protected for ever.
0:16:58 > 0:17:03It's the Rajah Brooke's birdwing. It has the most impressive wingspan.
0:17:03 > 0:17:06These are incredibly rare here, the simple fact that
0:17:06 > 0:17:11they're so beautiful collectors will pay immense prices for them.
0:17:11 > 0:17:17Apparently if you can get a live specimen to Japan it'd be worth about as much as 1000 each.
0:17:17 > 0:17:20They're far better out here on the wing.
0:17:20 > 0:17:26The steep canyon sides are home to some very specialised creatures.
0:17:26 > 0:17:33This frog has evolved to live on slippery waterfall rocks and is an expert at avoiding capture.
0:17:33 > 0:17:35Ah! Ha ha!
0:17:37 > 0:17:41Professor Tyrone Hayes has been chasing frogs since he was a child.
0:17:41 > 0:17:44You go down the bottom I'll cut across the top.
0:17:46 > 0:17:50He's gonna go straight into the waterfall, I bet.
0:17:50 > 0:17:51Ha ha ha!
0:17:53 > 0:17:56What it does is it leaps into the waterfall to escape predators,
0:17:56 > 0:17:59or scientists that want to collect it and that's exactly what he did.
0:17:59 > 0:18:03Rather than jump back, he went straight over the boulder.
0:18:06 > 0:18:08Hammerhead flatworm.
0:18:08 > 0:18:09Bizarre!
0:18:20 > 0:18:25With time running out, Gordon is using technology to help the search for species.
0:18:25 > 0:18:29It's a video camera trap that captures animals 24 hours a day -
0:18:29 > 0:18:31if it's put in the right spot.
0:18:33 > 0:18:38It's running. Knowledge of the animals is much more important
0:18:38 > 0:18:42than the knowledge of equipment, because you've got a manual
0:18:42 > 0:18:46that you can open up and, if you've got half a brain in your head,
0:18:46 > 0:18:48you can work out what equipment does.
0:18:48 > 0:18:50But with making wildlife films, you've got
0:18:50 > 0:18:53to have an understanding of the animals. Good luck.
0:18:53 > 0:18:58The camera trap is on a natural hilltop trail he believes animals regularly use.
0:19:02 > 0:19:08With two days to go, a mysterious sound has been heard, far away down the valley.
0:19:10 > 0:19:13The haunting call of the orang-utan.
0:19:15 > 0:19:23Now, with forest destruction, truly wild orang-utans are very rare and notoriously shy of humans.
0:19:23 > 0:19:27These orangs were filmed in a well-established nature reserve
0:19:27 > 0:19:30where they're used to the presence of humans.
0:19:31 > 0:19:36To find a population in Imbak would be a major breakthrough.
0:19:45 > 0:19:50This call is the first evidence that orangs live in the canyon.
0:19:52 > 0:19:54Justine is off in pursuit.
0:19:54 > 0:19:57She follows the river all the way down to the edge of the canyon.
0:19:57 > 0:20:01We didn't think there were orangs around here at all.
0:20:01 > 0:20:04We haven't found any around our camp.
0:20:04 > 0:20:10No signs, no nests nothing, so this is a bit further afield. We've followed the Imbak down and
0:20:10 > 0:20:15there's definitely orang around here so that's great. Maybe there's more than one, who knows?
0:20:15 > 0:20:19But she's probably on some sort of circuit and she'll come back.
0:20:19 > 0:20:21This has got fruit on it.
0:20:21 > 0:20:26The remains of the orangs' favourite food, figs, lie all around.
0:20:26 > 0:20:28Quite a perfumed smell.
0:20:28 > 0:20:30Very soft.
0:20:33 > 0:20:38Justine decides to use the highest tree in the area as a look-out post.
0:20:39 > 0:20:41I can hear them.
0:20:43 > 0:20:44They're proving elusive so far.
0:20:48 > 0:20:51Fingers crossed today will be the day,
0:20:51 > 0:20:55or there'll just be stingless bees to annoy me and that's it.
0:21:01 > 0:21:07To hear a call is one thing, to actually see it and film it is another matter entirely.
0:21:07 > 0:21:09There's a chance I'll get a few shots.
0:21:09 > 0:21:13Just a glimpse, that'll do.
0:21:17 > 0:21:22Back at the waterfall, the resident frogs are still giving Steve the slip.
0:21:22 > 0:21:24You little... Arrgh!
0:21:24 > 0:21:32As a kid I spent many summers making plans for how I was gonna catch this animal, that animal...
0:21:32 > 0:21:35and I get to do the same thing now.
0:21:35 > 0:21:38These little frogs are pretty quick, so I'm going to construct a net,
0:21:38 > 0:21:40see if that'll help us out.
0:21:43 > 0:21:45Ha ha ha!
0:21:45 > 0:21:48Frog master!
0:21:48 > 0:21:51See. What we should have done was brought a proper net.
0:21:51 > 0:21:53But that's kinda the easy way out.
0:21:53 > 0:21:58If you look close, you see the expanded toes, so they have
0:21:58 > 0:22:03the ability to stick to the rock like a tree frog. Then, finally, what they do after bing, bing, bing,
0:22:03 > 0:22:10they escape by jumping into the rushing water in the waterfall and that's how this little frog
0:22:10 > 0:22:11makes its living.
0:22:12 > 0:22:16Justine's staking out a tree full of ripe figs.
0:22:16 > 0:22:19It should be a magnet for orang-utans.
0:22:19 > 0:22:22But for some reason they're staying well away.
0:22:24 > 0:22:29I thought I was gonna see an orang straight away, which I know is completely unrealistic,
0:22:29 > 0:22:33but I thought seeing as it's got so many fruits on this tree, I'm bound to see loads of stuff.
0:22:33 > 0:22:36This is my view out from the platform.
0:22:37 > 0:22:43And as you can see... it's a very long way down.
0:22:46 > 0:22:50The rainforest birds are drawn to the ripe fruit.
0:22:50 > 0:22:54Including the spectacular rhinoceros hornbill.
0:22:54 > 0:22:56That's brilliant.
0:22:56 > 0:23:01Their huge beaks can pluck the figs from the tree with enormous precision,
0:23:01 > 0:23:08but Justine has noticed these birds on the canyon edge are acting strangely.
0:23:08 > 0:23:11The hornbills have been so surprisingly nervous.
0:23:11 > 0:23:16Even though I've got all this hide stuff up, they've noticed something strange and then carried on,
0:23:16 > 0:23:19but one or two that landed took straight off again.
0:23:23 > 0:23:28Justine treks further out of the canyon to find a better place to film
0:23:28 > 0:23:31and there she makes a grim discovery.
0:23:31 > 0:23:39This is a trap or a snare for an animal that hunters are setting.
0:23:39 > 0:23:44There's a little gate here almost, little passageway. Then, they fence
0:23:44 > 0:23:51the area so there's an obvious route through. As the animal comes through there's a noose here.
0:23:51 > 0:23:53There's a diminishing area,
0:23:53 > 0:23:59so if you do want to hunt there's quite small patches really left to hunt in cos the rest of it
0:23:59 > 0:24:04has been turned to oil palm plantations, which have nothing but rats and snakes in them.
0:24:06 > 0:24:11The hunters have penetrated further than anyone thought.
0:24:11 > 0:24:15It's scuppered the chances of Justine filming these nervous orang-utans.
0:24:24 > 0:24:28In the dead of night, Steve is making one final search for nocturnal animals.
0:24:36 > 0:24:39Oh, look, what's going on there?
0:24:40 > 0:24:43I think that's a she.
0:24:43 > 0:24:44She's laying eggs.
0:24:51 > 0:24:54Absolutely extraordinary, three-dimensional web
0:24:54 > 0:25:00designed to catch creatures coming in from all different angles.
0:25:00 > 0:25:06Amazing thing is that the spider that seems to have created this is absolutely weeny.
0:25:06 > 0:25:08It's the diddy little thing in there.
0:25:19 > 0:25:22It's their last day looking for animals in the canyon.
0:25:22 > 0:25:25Gordon goes to check his camera traps.
0:25:26 > 0:25:29Exciting.
0:25:29 > 0:25:31A rat.
0:25:31 > 0:25:33Very nice but we don't want that.
0:25:33 > 0:25:35Another rat.
0:25:35 > 0:25:38He scrolls further and further through the tape
0:25:38 > 0:25:40and it reveals...
0:25:40 > 0:25:42absolutely nothing.
0:25:42 > 0:25:45Please, please, please, please, please,
0:25:45 > 0:25:48please, please, please, please, please, please, please, please!
0:25:50 > 0:25:53Something's triggered the camera.
0:25:53 > 0:25:57- But there's nothing on film. - Running and running and running...
0:25:57 > 0:25:58with nothing.
0:26:01 > 0:26:07Before they leave base camp, Tara is doing a count up of all the animals they've found.
0:26:07 > 0:26:10So I'll go write them up, and you guys yell them out.
0:26:10 > 0:26:11Binturong, how do you spell that one, how do you spell that.
0:26:11 > 0:26:14- Silver leaf monkey.- Gibbon.
0:26:14 > 0:26:16- Gibbon, what about...- King cobra!
0:26:16 > 0:26:18Keel back, King cobra.
0:26:18 > 0:26:22- Let's have the Rajah Brooke's birdwing, which is very nice. - Bent toed forest gecko.
0:26:22 > 0:26:25Gecko, yeah, yeah.
0:26:25 > 0:26:28Add a rat to the list!
0:26:30 > 0:26:33- So no clouded leopard yet.- Not yet.
0:26:33 > 0:26:37This list is the first step to making the official expedition report.
0:26:37 > 0:26:41They've recorded over 120 species of mammals, reptiles and birds.
0:26:43 > 0:26:45A cause for celebration.
0:26:45 > 0:26:51The only disappointment for Gordon is that his camera traps haven't found any animals.
0:26:51 > 0:26:53Or so he thinks.
0:26:53 > 0:27:01As the team relaxes at their last night party, in the forest Gordon's traps click into action.
0:27:01 > 0:27:04At first, just another forest rat.
0:27:04 > 0:27:08But then a bearded pig snouting for roots and worms.
0:27:11 > 0:27:16And at midnight ,the camera captures one of the strangest animals in Borneo.
0:27:16 > 0:27:17The tangalung.
0:27:17 > 0:27:24Neither a cat nor a dog but a unique type of carnivore that lives only in the jungle.
0:27:26 > 0:27:31It's an impressive last-minute addition to the list of animals that live in the Imbak Canyon.
0:27:31 > 0:27:36The team are now in no doubt that there's a huge variety of wildlife here,
0:27:36 > 0:27:40and with protection, it could be a permanent home for elephants,
0:27:40 > 0:27:44clouded leopards, gibbons and even the orang-utan.
0:27:45 > 0:27:47See you soon, OK.
0:27:47 > 0:27:50But for the team it's now the end of their time in Imbak Canyon.
0:27:50 > 0:27:57They're setting out on phase two, exploring other endangered regions even deeper in the heart of Borneo.
0:27:57 > 0:27:59Bye!
0:27:59 > 0:28:03Tara and her team are heading south, taking canoes up the Bungulung river
0:28:03 > 0:28:09in search of the lost caves of Sangkulirang, home to an ancient culture.
0:28:09 > 0:28:15This one's a tricky rapid, cos the water is coming at us from the side and from in front.
0:28:19 > 0:28:24Steve is heading west to explore the biggest hole in Borneo.
0:28:24 > 0:28:26Oh, wow!
0:28:26 > 0:28:28That is unbelievable!
0:28:28 > 0:28:30If you could just get a line down into it...
0:28:33 > 0:28:35And in tomorrow's programme, the team go deep
0:28:35 > 0:28:41inside a remote rainforest cave to find traces of a lost civilisation.
0:28:43 > 0:28:49Everything down there is totally uncharted and we'd certainly be the first people to go down there.
0:28:49 > 0:28:54But there's trouble ahead for the climbers as they drop into the void!