so being able to navigate over water is a crucial skill.

[MUSIC PLAYING]

Orangutans aren't built to swim, as their dense bodies

sink rather than float.

[MUSIC PLAYING]

But crossing a rope bridge is a walk in the park

with these arboreal apes.

[MUSIC PLAYING]

Even Kesi with her missing hand isn't

fazed by the obstacle course.

[MUSIC PLAYING]

She's become much braver since her arrival to Bangamat Island,

but she still prefers eating alone.

[ORANGUTAN GRUNTS]

She can't sit-in her usual spot under the platform here,

so she improvises.

[WATER SPLASHES]

As she munches away on her favorite turnips,

something catches her attention.

[MUSIC PLAYING]

She moves in for a closer look.

[MUSIC PLAYING]

There are no ropes to get her there.

[MUSIC PLAYING, WATER SPLASHING]

At first, she walks on submerged trees

to keep her head above water.

[MUSIC PLAYING, WATER SPLASHING]

But then she actually swims.

[MUSIC PLAYING]

This is very unusual.

[MUSIC PLAYING, WATER SPLASHING]

But orangutans who grow up in rehab

appear to be more curious than those in the wild.

[MUSIC PLAYING, LEAVES RUSTLING]

Kesi's motivation for this risky choice is, of course, food.

[MUSIC PLAYING]

What she spied were termites.