Hawaii's 20 surviving species of honeycreeper also evolved from just a few individuals

夏威夷幸存的20种蜜旋木雀也是从少数个体进化而来的

Compared to seabirds

与海鸟相比

Honeycreepers are poor fliers

蜜旋木雀的飞行能力较弱

So how did the ancestors of these forest birds and Hawaii's other castaways get here

那么这些森林鸟类和夏威夷其他漂流者的祖先是如何到达这里的呢

The answer may be blowing in the wind

答案可能就在风中

Even the gentlest breeze can have a huge impact

即使是最轻柔的微风也能产生巨大的影响

Tree ferns stir and release their lightweight spores

树蕨摇动并释放出它们轻质的孢子

Thermal updrafts can carry the spores 30 000 feet into the jet stream

热上升气流可以将孢子带到30000英尺高的喷气流中

And there are even animals designed to ride these high-altitude air currents

甚至有些动物天生就适应了高空气流的旅行

Near-weightless spiderlings are expert ballooners

几乎无重量的蜘蛛幼虫是气球飞行的专家

Catching the wind with their gossamer threads

用它们纤细的丝线捕捉风的力量

Like spores they too can hitch a ride on the jet stream

像孢子一样，它们也能搭乘喷气流

Enduring temperatures of minus 30 degrees centigrade

忍受着零下30度的低温

A spider can cross the breadth of the Pacific in a matter of days

一只蜘蛛可以在几天内横跨太平洋