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The biggest can weigh up to four kilograms - the same as a newborn baby
最大的體重超過4公斤，相當于一個新生兒
and have a leg span of one metre.
四肢跨度長達一米
It's a hermit crab on steroids.
它屬于陸生寄居蟹科
At night, the huge "robbers" really come alive.
夜間，大盜活躍起來
Although these crabs are found throughout the Pacific,
雖然這種蟹在太平洋隨處可見
it's only on undisturbed islands that you can see them in such numbers.
但只有在人跡罕至的小島上才能看到數量如此眾多的蟹群
Exactly why robber crabs have grown so big is a mystery,
盜蟹為何體型巨大仍是個謎
but with so few creatures making it to these remote islands,
由于只有少數動物才能涉足這些偏遠的島嶼
the giant crustaceans seem to have filled a niche normally taken by medium-sized mammals.
大甲殼綱動物似乎填補了中型哺乳類動物所占據的位置
And with almost no competition from other native animals,
小島上幾乎沒什么競爭可言
the crabs' huge size allows them to make the most of another great coloniser - something found here in abundance.
巨大的身軀使盜蟹能夠充分利用島上另一個重要的移民，一種島上隨處可見的東西
Coconuts are one of their favourite foods -
椰肉是盜蟹的最愛
it's why they're also called "coconut crabs" -
所以它們也被稱為椰子蟹
and they've been known to carry them as far as three miles to a favourite den.
它們能將椰子帶回到5公里外的巢穴
