Polar Bear

Janet Fanami Period 3 5/16/16

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Habitat

Polar bears are located in the circumpolar north areas where they hunt for their food. they can be seen in Canada(home to 60% of polar bears), the United States (Alaska), Green Land, Russia, and Norway. populations of 19 polar bears live in four different ice sea regions across the Arctic.(Where do polar bears live)

Movement

Polar bears walk at a speed of five to six kilometers an hour.females with cubs walk at a speed of two and a half to 4 kilometers an hour. polar bears are known for being slow , but they can gallop like a horse at short distances. Norwegian scientist Nils Oritsland stated that polar bears expend more that twice the energy of most other mammals. Walking bears expend 13 times more energy that resting bears, this explains their preference for still-hunting. Polar bears can run up to 40 kilometers an hour -for short distances only. leaner bears are the greatest runners, they can run 2 kilometers straight.
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Body Covering

Polar bear's fur is a dense, insulating underfur topped off by guard hairs of various lengths. Their fur is not actually white, it just looks as if it is white. Each strand of fur is actually transparent, but reflects light with a hollow core. Also, oils from the seals they eat makes the fur look as if it is yellow. polar bears have a layer of black skin which there is fat, that measures up to 4.5 inches.
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Diet

They polar bear's main prey is the ringed seal. Polar bears usually hunt by waiting for prey to breathe through the ice cracks/openings. Polar bears locate the breathing holes of their prey using there powerful sense of smell.
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Adaptations

Polar bears are adapted to life in the Arctic/ sea ice. Winter temperatures can vary from -40 to -50 degrees Fahrenheit. on really cold days polar bears would dig shelter holes or pits and curl up in a ball.

Reproduction

Things that all polar bears do is mate. Mating settles on sea ice from April to late June, but the fertile ova does not take place until the fall. Females usually give birth to their cubs after about two months in their maternity den. Newborns are 12 to 14 inches long and weigh a little over a pound. they grow quickly on their mother's milk. For at least 20 moths cubs depend on their mother's milk.(Mating and Birthing)
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Other facts/Info

  • The polar bear can measure up to 2.5m long
  • Polar bears can swim
  • even though they can swim they are not fast enough to catch a seal in the open
  • once again their fur isn't white
  • their biggest harm is global warming

Work Cited

"Cold Climate." polar bear international. N.p., n.d. Web. 12 May 2016. <http://www.polarbearsinternational.org/about-polar-bears/essentials/sleeping-and-bedding>.



"Fur and Skin." Polar bears International. N.p., n.d. Web. 13 May 2016. <http://www.polarbearsinternational.org/about-polar-bears/essentials/fur-and-skin>.



"Hunting and Diet." Polar bears international. N.p., n.d. Web. 13 May 2016. <http://www.polarbearsinternational.org/about-polar-bears/essentials/hunting-and-eating>.



J., Daniel. "Where do polar bears live?" Polar Bears International. cox/Natural Exposures, n.d. Web. 9 May 2016. <http://www.polarbearinternational.org/polar-bear-facts-information/where-do-polar-bears-live>.



"Mating and Birthing." Polar Bear International. N.p., n.d. Web. 13 May 2016. <http://www.polarbearsinternational.org/about-polar-bears/essentials/mating-and-birthing>.



"Walking and Running." Polar Bears International. N.p., n.d. Web. 13 May 2016. <http://www.polarbearsinternational.org/about-polar-bears/essentials/walking-and-running>.