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Polar bears are only found in the Arctic. The most important habitats for polar bears are the edges of pack ice where currents and wind interact, forming a continually melting and refreezing matrix of ice patches and leads (open spaces in the ocean between sea ice). These are the areas of where polar bears can find the greatest number of seals.As the sea ice advances and retreats each season, individual polar bears may travel thousands of miles per year to find food. Polar bears are distributed throughout the Arctic region in 19 subpopulations, including Alaska, Canada, Russia, Greenland and Norway.

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They seek out maternity dens in October or November. Most maternity dens are located on land where snow accumulates including along coastal bluffs, river banks or pressure ridges on sea ice.  Sows give birth to usually 1 or 2 one-pound cubs and then nurse them until they reach about 20-30 pounds before emerging from the den in March or April. The young are born from November through January while the mothers are hibernating. Cubs will remain with their mothers for a little over 2 years. Female polar bears can produce five litters in their lifetime, which is one of the lowest reproductive rates of any mammal.

Mating Season: Late March - May
Gestation: About 8 months with delayed implantation
Litter size: 1 - 4 cubs; though 1 or 2 cubs is most common

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They protect themselves by having sharp claws and having black fur under white fur to make it easier to hunt , fur even grows on the bottom of their paws to protect them from the cold

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As an apex predator at the top of the food web, they can signal that there are problems in the Artic marine ecosystem. They are likely to be among the most significantly affected species as the Artic warms and sea ice melts.

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As for the polar bears, they spend most of their time on floating sheets of sea ice hunting for their favorite food, seals. But as the Arctic has warmed in recent years, the ice is melting earlier. ... We can all contribute to reducing climate change, and therefore help polar bears and other endangered species.

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The loss of sea ice from climate change is a threat to Polar bears.The World Conservation Union (IUCN) estimates that there are between 20,000-25,000 polar bears in the world.

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On occasion, polar bears kill beluga whales and young walruses. When other food is unavailable, polar bears will eat just about any animal they can get, including reindeer, small rodents, seabirds, waterfowl, fish, eggs, vegetation (including kelp), berries, and human garbage.