0:00:02 > 0:00:07On Deadly 60, I've had loads of incredible animal encounters.
0:00:07 > 0:00:10Here's just one of my many favourites.
0:00:11 > 0:00:15This is Deadly 60 Bites.
0:00:15 > 0:00:18Up early in Uganda, we're racing through the forest to catch up
0:00:18 > 0:00:21with a group of wild chimpanzees.
0:00:24 > 0:00:27HOOTING
0:00:27 > 0:00:29Yes, fantastic!
0:00:32 > 0:00:34That is the chimpanzee long call.
0:00:37 > 0:00:40It's just this excited wail that builds and builds.
0:00:40 > 0:00:46We are utterly surrounded, and being pelted from above with figs!
0:00:48 > 0:00:51Up since first light, the chimps are gorging themselves
0:00:51 > 0:00:54on ripe figs for breakfast.
0:00:56 > 0:00:59- Oh, no! - This is what we expect in the forest.
0:00:59 > 0:01:01Was that fig or was that poo?
0:01:01 > 0:01:03- No, it's fig.- No, it wasn't.
0:01:03 > 0:01:06I'm sorry, Ronald, that is not fig.
0:01:06 > 0:01:11That is chimp poo and it just clouted me right in the face.
0:01:11 > 0:01:15I have a feeling this is how our day is going to go.
0:01:15 > 0:01:17THEY LAUGH
0:01:17 > 0:01:21Less than half of the chimps' diet is made up from fruit.
0:01:21 > 0:01:24What they actually feed on a lot of the time is monkeys,
0:01:24 > 0:01:26and even small antelope.
0:01:28 > 0:01:29Chimps are ruthless hunters
0:01:29 > 0:01:32and their favourite prey are colobus monkeys.
0:01:32 > 0:01:36These leaf-eating monkeys are smaller and more agile than chimps,
0:01:36 > 0:01:40but they can be cornered and caught when the chimps use
0:01:40 > 0:01:43their team tactics to surround them in the trees.
0:01:46 > 0:01:50Several males will chase the monkeys into an ambush,
0:01:50 > 0:01:55then the hunters gather around to share in the meal.
0:01:55 > 0:01:59This hunting may be gruesome, but the protein from the meat
0:01:59 > 0:02:02is a vital part of the chimps' diet to help fuel those big brains.
0:02:02 > 0:02:07Intelligence and teamwork, now that's deadly!
0:02:16 > 0:02:18Here he comes...
0:02:18 > 0:02:20This way.
0:02:22 > 0:02:25He'll come down this vine here.
0:02:26 > 0:02:28This is an adult male,
0:02:28 > 0:02:30just beginning to descend.
0:02:30 > 0:02:34A big male chimp like this would be
0:02:34 > 0:02:38a fair bit smaller than me, but a lot stronger.
0:02:38 > 0:02:41The arms are proportionally much, much longer,
0:02:41 > 0:02:44great for swinging through the treetops.
0:02:44 > 0:02:46A really powerfully-built animal.
0:02:46 > 0:02:48Once they're down at our level,
0:02:48 > 0:02:50we get a totally different perspective on them.
0:02:50 > 0:02:54Their mood seems to have changed entirely
0:02:54 > 0:02:56from the boisterous squabbling over fruit...
0:02:56 > 0:03:00to silently stalking the forest floor.
0:03:03 > 0:03:05(Look over there.)
0:03:09 > 0:03:14Humans and chimps share a common ancestor.
0:03:14 > 0:03:17They're our closest living relatives.
0:03:17 > 0:03:21When you're this close to them, there's so much about appearance,
0:03:21 > 0:03:26about their gestures, their facial signs that's very, very human.
0:03:26 > 0:03:28But there's also
0:03:28 > 0:03:33a lot about our similarities that makes them deadly.
0:03:35 > 0:03:40High-swinging, tool-using, co-operative hunting...
0:03:42 > 0:03:45Chimpanzees are on the Deadly 60.