There are 50 million of them.
遷徙的紅蟹數量多達五千萬只。
It's an event that has brought the island worldwide fame.
這一景象讓這座島嶼舉世聞名。
But in recent years, millions of red crabs haven't managed to reach the sea.
但近些年來,數以百萬的紅蟹未能成功抵達海洋。
An invader has occupied this island. Yellow crazy ants.
一種入侵物種占領了這座島嶼。黃瘋蟻。
They escaped from visiting ships and with no predators to control them,
它們搭乘來訪的船只來到島上,由于缺乏天敵控制,
they have now created vast super colonies in the forest.
它們在森林里建立了巨大的超級蟻群。
When migrating red crabs march into their territory, the ants attack.
當遷徙的紅蟹經過它們的領地時,黃瘋蟻便展開攻擊。
Squirting acid into the crabs' eyes and mouths.
它們朝紅蟹的雙眼和嘴中噴射酸液。
The crabs have no defence.
紅蟹毫無還手之力。
Blinded and confused... they're doomed.
雙目失明,迷失方向,它們便死定了。
Humans brought these ant invaders here, and now humans are having to control them.
是人類把這些螞蟻入侵者帶上了島,而現在人類不得不采取措施控制局面。