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Beaver Lodge Construction Squad | Attenborough | BBC Earth
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زیرنویسها (86 بخشها)
A beaver, one of a family that lives here in this lake
at the foot of the Teton Mountains in Wyoming.
While beavers can get around perfectly well on land,
they are most at home in the water,
where their webbed hind feet and large paddle-like tail
make them powerful swimmers above and below the surface.
Like marmots, beavers feed on all kinds of vegetation,
and eat wood as well as leaves.
And they are accomplished engineers.
This great pond is entirely their own creation.
Only a few years ago,
this shallow, pebbly stream flowed straight down the valley.
Then a family of beavers moved in and built a dam.
The main body of it is built of boulders.
On the downstream side, it's been lined with logs,
some of them big and quite heavy,
and on this side, it's been packed with mud and vegetation.
It's been built so accurately that it is, to within a few inches,
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با تمرینها یاد بگیرید
تمرینهای واژگان، گرامر و درک مطلب از این ویدیو بسازید
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