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Polar bears

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on 2 March 2014

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Transcript of Polar bears

Polar Bears!
Type: mammal.
They are very strong swimmers.
Their paws are webbed to
help them swim.
Weight:410 to 720 kg.
Size:head and body,7.25 to 8 ft or
2.2 to 2.5 m. Tail 3 to 5 in., 7.5 to 12.5 cm.
Average life span in the
wild:25 to 30 years.
Their white fur helps them to hide
in the snow.
Polar bears mainly eat seals.
Polar bears sleep for 7 to 8 hours.In spring and
summer polar bears sleep more during the day than
Polar bear's fur appears to be white, but it almost
looks colourless. It is almost transparent but it is not, it contains keratin. Keratin is almost clear like your fingernails which have keratin in them too.
The long hairs are hollow letting the warm rays of the sun reach into the dark skin that acts as a solar heat collector. The air filled guard hairs also help insulate the bears from the cold temperatures.
Polar bears live in the arctic north where they
can hunt seals at openings in the sea ice. Canada is home to roughly 60% of the world's polar bears.
Polar bears are expert hunters.
They can hunt in areas that are
between ice and water.Their excellent
sense of smell is used to locate a seal breathing
hole, where they wait for the seal to appear. When
the seal comes out to breathe, the polar bear
smells it breathing. It reaches into the hole
with its front paws and drags it out of the
water.They kill the seal by biting its head.

The polar bear's habitat is mostly
within the Arctic Circle, including
the Arctic Ocean.
Full transcript