This essay Polar Vs. Brown Bear has a total of 1021 words and 5 pages.
Polar Vs. Brown Bear
There are eight different species of bears found throughout
the world: the spectacled bear, the Asiatic black bear, the brown
bear (including grizzlies), the polar bear, the sun bear, the
American black bear, the sloth bear and the giant panda.
Even though most people can distinguish a polar bear from a brown
bear by the color of the fur, a lot of people fail to identify all the
differences among those two species. Both bears can be perceived as
large, clumsy and lumbering beasts with heavily built bodies but short
legs, necks and tails. Both of them have rounded ears and noticeably
small eyes relative to their large body size. While both of the bears
belong to same family, they have several profound differences. They
live in different geographical areas, differ in amount of the
population, size, physical features, some eating habits, and their
behavior toward human beings.
The polar bear is found in all of the polar regions of the entire
northern hemisphere. This includes Russia, Norway, Greenland, The
United States and Canada. Their preferred habitat is in the area where
the northern seas meet the shoreline. In this area, there is a constant
freezing and thawing of the ice. It is estimated that there are
currently somewhere between 20,000 and 40,000 polar bears.
The polar bear is the largest member of the bear family, weighing
in at between 440 and 1760 pounds with overall body length 11.5 feet.
It can grow much larger, however. In fact, there is a record of an
adult polar bear weighing over 2200 pounds.
Polar bears have a distinctive all white fur which is important
camouflage when hunting on the ice pack. Their actual color of the
skin is black which is thought to be an adaptation for better heat
retention. Compared to the other bears, the neck of polar bear is
much longer. This makes it easier for them to keep their heads above
water when swimming. Like those of other bears, the ears of the polar
bear are round. They are, however, smaller and closer to the head.
This also helps the animal to be an exceptional swimmer. The forepaws on a
polar bear are very large. With a diameter approaching 12 inches and
partial webbing between their toes, polar bears are able to use their
front feet much like paddles to propel them rapidly through the water.
Polar bears are excellent swimmers. They are able to swim distances
greater than 60 miles without a pause to rest, maintaining average
speed of 6 miles per hour. On land, they are not as quick as brown
bears and appear to have traded off speed for their extremely massive forelegs which they use to break through seal dens and to flip a large seal out of the water.
Polar bears have also developed large stomachs with a capacity of more than 150 pounds of food. Their digestive system is also more adapted for processing meat than plant material because they are almost exclusively meat eaters. While out on the ice, their diet consists mostly of marine mammals such as the ringed seals, bearded seals and occasionally a walrus or narwhal. Also, in keeping with their carnivorous nature, the canine teeth, used for seizing and holding prey, are longer, sharper and spaced wider apart than in brown bears.
Polar bear are at the top of the arctic food chain with no natural
enemies. Because of that, compared to other bears, polar bears are the
most aggressive and more willing to consider humans as a prey. In
other words, when they see a human, they see a walking meal.
Consequently the person attacked is usually killed unless the bear is
killed first. The most carnivorous, they are also the most patient and determined all of bears. In some instances they may follow a person for hundreds of miles in order to hunt him down. Out of eight species polar bear is considered to be the most dangerous to human beings.
The brown bear has the most widespread distribution in the world of
any of the eight bear species. They are found throughout most of the
northern hemisphere including North America and Eurasia. Their
preferred habitat includes mountain forests, open meadows and large
river valleys. It is estimated that
Topics Related to Polar Vs. Brown Bear
Bears, Polar bear, Brown bear, Asian black bear, American black bear, Sloth bear, Spectacled bear, ABC Islands bears, Sun bear, Grizzlypolar bear hybrid
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