奇妙岛屿 21

Thousands of species have humans to thank for

bringing them to islands throughout the Pacific.

But there's one animal that has been a valued travelling companion

for as long as people have sailed this ocean.

Wherever people went,

pigs went too.

In Vanuatu,

1,200 miles north of New Zealand,

the people of Tanna Island have gathered for a festival.

Like an expensive car in Western culture,

here pigs are a symbol of wealth and status.

The Toka festival celebrates the end of warfare between rival clans,

and pigs are at the centre of it.

To attend, each village must bring some to the party,

that's a lot of pigs.

Some will be butchered for a feast,

others given away.

But to take one of these pigs home,

a family must agree to one day repay the debt

and it's these pig debts that help strengthen the bonds

between the different villages.