POLAR BEAR

HABITAT

The polar bear, also known as: white bear, belongs to a species of biggest carnivorous mammals of the world.

Apart from, some zoos around the world, the only place that polar bears life is in Canada, Greenland, Norway, Denmark, Russia, Alaska and Iceland, they do not live in Antarctica.

Their habitat is more extensive, they can live with snow and without it. In the summer it is different in other places, because there are other temperatures that causes melting. 

They are mammals, adaptable to any habitat.

Polar bears only live where it is colder, around the Artic.

 The unique exception are the polar bears that live in the zoos around the world, they are capable to adapt to the hot climate.

There are more false ideas about the polar bears, for example, we think that they are very dangerous and that they like eating human meat, but they are more protectors and they only attack if they feeling in danger.

REPRODUCTION

Polar bear reaches their sexual maturity when they are 4 years old. Mating is in April and May when the male and female live together. Male can follow the tracks that female do.

Polar bears are polygamous so that, the female can have different calves. When the females are expecting their calves, they store fats and then take refuge.
Calves are usually born being 30 cm tall and 700 cm weight.

They usually have twins. During 5 months they grow very fast. Usually calves remain 10 months with their mother. Polar bears lived about 18 years but in Canada a polar bear lived 30 years.

They are 19 different groups but there aren't subspecies.

Their unique enemy is the human.



FOOD FOR POLAR BEARS

The polar bears are large creatures, so is possible that they need a big quantity of aliments for fillingtheirselves. They feed from many artic animals. In spite of everything, their favourite are the reindeer and the focus offspring. They know that the focus are going to the surface for taking the air. Is for this that quickly they attack with a ball of claw. Thus are meet for squash the cranium of the focus with their powerful jaw.

They can eat 30 kilos of food the day, and the young one kilo. The polar bears don’t drink water, since in its environment it is salty and sour. They take fluids that they need of the blood of their prey. Also it has been found recently that the polar bears can arrive to be cannibals, in special the males, if they suffer too much hunger they don’t have problems to eat other bears, in special the Young or generally died.

There are other forms of food that polar bears consume, if they can’t have focus. One of them is the walrus. They tend to go for the elderly who are weak, or younger. They have also been known to hunt whales.

The polar bears have a very strong stomach so even food that is in an advanced state of decomposition can be consumed by them without any adverse effects.

ANATOMY

The polar bear is a very large animal, males weigh up to 1,500 kg.

Females are only about 800 kg as adults.

Males can be up to 10 meters and females only about 8 meters.

The body of a polar bear is very different from other types of bears.

The claws are walking through the snow and ice, which is abundant in their natural habitat.

They have a skull and long nose, short legs and long feet with pillows, and they can walk and swim.

They are 42 very long teeth. The skin of a polar bear is white and very thick with layers.

It has good sense of smell, hearing and vision.

They can swim and float 200 km long and run at 6km / h.

EXTINTION

Traditionally, polar bear were hunted by the eskimos and other artic towns, for the meat and the skin, avoiding ingesting their liver, which contain extremely high levels of Retinol (Vitamin A form found in the animal kingdom), to consume it is dangerous for humans. 
IUCN believes that the number of polar bears has been reduced by at least 30% over the last 45 years. 
The latest threats include accumulation of pollutants in the atmosphere and Arctic ice and warming that is affecting it's ecosystem.