- [Narrator] Goma has returned to her cubs, (water splashing) Asa and Bune who are practicing hunting skills.

(water splashing) And it's time to put them to the test.

(insects chirping) - [Anna] Asa and Bune are like twins, they like to do everything together.

They just wanna play with everything around them.

(animal chirping) - With prey nearby, Goma seems to be signaling.

(animal chirping) - It kinda looks like Goma uses her tail to direct her two cubs.

- [Narrator] When hunting as a family, subtle commands appear to be important.

It's like a secret language.

- They seem to use their tails and their ears as signals.

They have created a way to communicate so that they are absolutely silent because that is what they rely on.

Going in as they ambush their prey.

- [Narrator] And this time the cubs are taking the lead.

- [Anna] Oh.

There's one cub that looks like he's got a plan.

He's staring at the deer in front of it.

Oh, he's going.

(birds calling) (lively music continues) (Anna laughing) It's like the cub has no idea what it's doing.

It's just walking straight towards the deer.

(cub growling) This cub is going to (indistinct).

(animal chirping) Bune seems to be more playful than his sister.

He's more confident, he's always out in front.

He's doing things he probably shouldn't be doing.

(gasping) Whoa, no way.

No way, they just chased a deer into Goma's mouth.

That was incredible.

Goma wasn't even looking, she was walking in the opposite direction, turned around to a deer just coming straight towards her.

Okay, so Asa and Bune have just helped Goma with a hunt.

I was not expecting that.

(insects chirping)