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Why do polar bears have white fur? And nine other polar behave facts

Who doesn't love the big, burly white bears of the north? Polar bears—at the top of the food chain and vital to the health of the Arctic marine surroundings—are important to the cultures and economies of Arctic peoples.

Polar bears' lives depend wholly on the sea, their main source of food, and the identify they spend most of their lives. But equally the climate warms, that ice is melting, threatening polar bears.

Take a expect at some interesting facts about polar bears:

one. Why do polar bears have white fur?
Polar bears have white fur so that they tin camouflage into their surroundings. Their coat is so well inconspicuous in Arctic environments that it can sometimes laissez passer as a snowfall migrate. Interestingly, the polar bear's coat has no white pigment; in fact, a polar comport'southward peel is black and its hairs are hollow. They take a thick layer of torso fat, which keeps them warm while pond, and a double-layered coat that insulates them from the cold Arctic air.

2. What practice polar bears eat?
The polar bear is the most carnivorous member of the carry family, feeding mainly on a diet of ringed seals because they demand large amounts of fat to survive. A polar bear's stomach can concur the nutrient equivalent of xv% to 20% of its ain bodyweight, and its digestive arrangement absorbs approximately 84% of the protein and 97% of the fatty it consumes.

3. How successful are polar conduct hunts?
A mutual method of hunting by polar bears involves the deport keeping perfectly nonetheless by a seal'south breathing hole, waiting for hours—or fifty-fifty days—for a seal to pop up for air. Seals are slippery and well designed to escape from polar bears; a polar carry might catch only i or 2 out of ten seals it hunts, depending on the time of year and other variables.

Video credit: © Students on Ice / WWF

4. Are polar bears good swimmers?
Polar bears are considered talented swimmers and can sustain a step of six miles per hour by paddling with their front end paws and holding their hind legs apartment like a rudder. Their paws are slightly webbed to help them swim. Polar bears are really classified as marine mammals because they spend most of their lives on the bounding main ice of the Arctic Ocean.

v. Why do polar bears like to keep clean?
Polar bears similar to keep make clean considering information technology helps the insulating properties of their fur. Fur that is dirty, matted, and moisture does non piece of work as well equally an insulator. Afterwards feeding, polar bears will usually launder themselves by taking a swim or rolling in the snow. They besides roll in the snow to cool off; despite the harsh conditions of their environment, polar bears tin be prone to overheating.

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Video credit: © WWF-US / Rhys Gerholdt

6. How big are polar bears when they are built-in?
Polar bears are simply well-nigh the size of an adult republic of guinea squealer when they are born. Mothers usually give nativity to twins, and cubs alive with their mothers for about 28 months. Fully grown, males usually measure nearly viii–nine feet nose to tail, and females about six–seven feet. Their lifespan is nigh 20–25 years.

seven. Where exercise polar bears alive?
Polar bears live in the Arctic, on ice-covered waters. Polar bears rely on sea ice to access the seals that are their chief source of food, every bit well as to rest and brood. The total polar acquit population is divided into 19 units or subpopulations. Sixty pct of the sub-populations are in Canada. There are 22,000-31,000 polar bears in the wild.

8. What are the biggest threats to polar bears?
The loss of sea ice habitat is the biggest threat to the survival of polar bears. Considering of ongoing and potential loss of their ocean habitat resulting from climate change, polar bears were listed as a threatened species in the Usa under the Endangered Species Human activity in May 2008. Other key threats include polar bear-homo conflicts, overharvesting and industrial impacts. As climatic change forces polar bears to spend longer time onshore, they come in contact more often with Arctic coastal communities and others working in the Arctic. Offshore petroleum installations and operations in the Arctic are expected to increase in number. This would likely affect polar bears and their habitat in many ways. Contact with spilled oil would exist fatal for polar bears and an oil spill would bear upon the entire food concatenation.

ix. Why are polar bears important?
Polar bears are at the pinnacle of the food chain and take an important role in the overall health of the marine environment. For thousands of years, polar bears have also been an of import function of the cultures and economies of Arctic peoples. Since they depend on sea water ice for their existence they are directly impacted by climate change—serving as an important indicator species.

10. What is WWF doing to protect polar bears?
It's important to know as much every bit possible about polar bears in order to best protect them. One way WWF is doing this is through collecting eDNA (as well known every bit environmental Deoxyribonucleic acid) from polar conduct footprints left in the snow. Animals naturally shed Dna through their feces, skin and hair which scientists can extract from a sample of h2o or soil. eDNA sampling volition be quicker, cheaper and less invasive than traditional methods used to monitor populations and has keen potential to be applied to a wide range of biodiversity, including almost mammal species, likewise as birds, reptiles, amphibians, insects, plants, even bacteria and viruses.

WWF is addressing climate change, reducing conflict, monitoring populations, and reducing industrial impacts. WWF has successfully advocated for the creation of an international polar bear management plan. WWF supports community projects in Alaska and Russia like local polar bear patrol teams, ameliorate lighting virtually public places, electrical fencing, bear-proof food storage containers and warning plans for when bears enter communities to assistance reduce conflict and proceed towns and bears condom.

• In This Story:
  • Furnishings of Climate Change
  • Polar Bear
  • Arctic
  • Polar Regions
  • Wildlife Conservation
  • Wildlife and Climatic change

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Source: https://www.worldwildlife.org/stories/why-do-polar-bears-have-white-fur-and-nine-other-polar-bear-facts

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