Name: 加拉帕戈斯群島：雀類(4/7) (Galapagos: the finches (4/7))
Uploaded: 2021-01-14T05:25:10.000Z
Duration: 2 min 11 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

Although he didn't realise it at the time,

the most important specimens Charles Darwin brought back

Initially he wasn't sure how they were related

they were examined by the ornithologist John Gould

he reported that in fact Darwin had brought back

all of which were unique to the Galapagos.

This realisation played a significant role

in Darwin's formulation of his theory of evolution.

The most important differences between the finches

to the availability of particular foodstuffs.

Eventually Darwin theorised that different species of finch

their distinctive beaks being an adaptation

to distinct natural habitats or environmental niches.

have come to the Galapagos to study its finches.

In this experiment researchers are observing the woodpecker finch,

using this wooden box to stand in for a tree.

is one of the only birds to use tools to help it find food.

A stick or small twig enables it to dig deeper into tree bark

in conditions which other birds would find difficult.

In the dry season it can gather up to 50% of its food in this way.

which in the wild need to eat every three hours,

so they never turn down the chance of a free meal.

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加拉帕戈斯群島：雀類(4/7) (Galapagos: the finches (4/7))

bring

distinct

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distinctive