Lemurs Make Rock Climbing Look Easy | BBC Earth

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0:01These are crowned lemurs.

0:13They don't live up here,

0:15but they must cross the peaks to find fruiting trees

0:18in the forest pockets.

0:53Exposed to the tropical sun,

0:56it's devilishly hot.

1:12The group seeks shelter and a brief respite.

1:27The lemurs are vulnerable here

1:29and need to get a move on.

1:48There's still a way to go before they reach the forest.

2:06They get to what looks like

2:08the most daunting part of the journey.

2:10A 30-metre drop where the limestone has fallen away

2:14to create sheer cliffs.

2:19But crowned lemurs are as good at rock climbing

2:22as they are at tree climbing.

2:39Once down, they'll find shelter from the heat and plenty to eat.

2:44But they must be on their guard.

2:53There is one danger that every lemur on the island fears.

2:57A hunter that climbs as well as they can.

3:00The fossa.

3:04No big African predators made it to Madagascar.

3:07There are no lions, no leopards, no wild dogs.

3:11Instead, the island's top predator is a giant mongoose.

3:17And it eats lemurs.

3:24But it has more curious habits.

3:28It's the mating season,

3:30and this female has stationed herself 15 metres up a tree.

3:34She's chosen a branch that will just support her own weight,

3:38plus that of a male.

3:46A male approaches.

3:47If she approves of him, she'll allow him to mate.

3:50If she doesn't, she'll back away to a thinner branch

3:53and he won't be able to get to her.

4:00She's only fertile for a few days a year,

4:03so setting herself up in this tall tree

4:06is a good way of advertising her availability to suitors.

4:11And it seems to work.

4:14This is the sixth male she's entertained today.

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