They are large and very fierce animals, they live in the most inhospitable areas of the planet, they are mammals, white and have very particular feeding methods, so if you want to know more about the Characteristics of the Polar BearWe invite you to read the following article. We assure you that you'll find very interesting things about this extraordinary animal.
Characteristics of the Polar Bear
It is the white bear or ursus marítimus, but it is better known by the name of polar bear and it is the most impressive terrestrial predator that lives in the Arctic region. It is classified as a mammal that feeds on meat, either smaller animals or fish, belongs to the bear family and is currently and without a doubt, the largest land carnivore in the world.
Although there are physical discrepancies visible to the naked eye with the brown bear, in reality they maintain many genetic characteristics, they are biologically related, which makes scientists suppose that on theory they could reproduce in a mixed race and have fertile offspring in both individuals.
But, despite the similarities, it must be said that they are two different species, both from the morphological point of view, as metabolic and in their social behavior. It has been established that the Ursus maritimus tyrannus, a very bulky subspecies of bear, is an ancestor of the polar bear.
The characteristics of the polar bear, some of which it shares with the Kodiak bear, refers to the fact that it is the largest of the species of ursids that exists. If you want to know how much the average weight of a white bear is, we will tell you that a normal male adult is over 500 kg in weight, but it has been established that there were individuals who could obtain a weight greater than 1000 kg.
If we talk about females, it is usual for white bears to weigh half of what a male specimen weighs and can reach a length of 2 meters in height. While males can measure up to 2,60 meters.
The body of the polar bear, although it is an animal of great volume, is more stylized than that of other families of bears that are related to it, such as the brown bear and the black bear. Another characteristic of the polar bear is that its skull is much smaller and tapers towards its snout than in other bear families.
facial features and sense of smell
Likewise, it can be seen that it has very small, black and very bright eyes, as if they were jet, and its highly evolved snout stands out for having an exceptional power of smell. Their ears are furry, very round and small.
The very particular facial arrangement of the polar bear has a double reason for being: to camouflage itself and so that it can avoid the greatest amount of loss of body energy heat through the exposure of its facial organs.
Its large body makes the polar bear difficult to distinguish, due to the absolutely white fur that covers it completely, among the ice that surrounds its environment, and constitutes a very effective disguise within its hunting area. The existence of this useful camouflage allows the white bear to crawl along the ice to stalk as many of the predators as possible. ringed seals, which are preferred food.
Thermal regulation
Elaborating on the polar bear's characteristics, it can be said that beneath its skin, the polar bear has a thick layer of fat that allows it to insulate itself from the cold, the ice, and the absolutely frigid waters of the Arctic, through which it swims, an activity it uses to hunt.
Another characteristic of the polar bear is that its paws are much more advanced than those of other members of the Ursidae family. They have evolved and adapted to travel immense distances on the vast ice of the northern continent and to swim long distances.
Where does the Polar Bear live?
The environment in which the polar bear lives is the ice that is perennially found in the arctic polar zone and the icy waters that surround icebergs and the fractured plains of the north polar regions. They are distributed in six large populations that are located in:
- The commonwealth located to the west of Alaska and Wrangel Island, both belonging to Russia.
- Northern Alaska.
- In Canada, where 60% of all living polar bear specimens on the planet are found.
- Greenland, in the autonomous zone of Greenland.
- The Svalbard archipelago, which is part of Norway.
- The Franz Josef Land or Fritjof Nansen Archipelago, also located in Russia.
Origin
The polar bear is a species of bear that originated in the following icy regions:
- America
- Asia
- to Canada
- Denmark
- United States
- Norway
- Russia
https://www.youtube.com/watch?v=X-sMk6EzWPA
Polar Bear Feeding
The polar bear obtains its food, in particular, from young individuals of ringed seals, its favorite food, and can hunt these prey without any difficulty, both under water and on ice, moving with impressive grace.
hunting techniques
It should be noted that the polar bear has two particular ways to execute its hunts: the first is to crawl as far as possible with its body attached to the ice to a seal that is resting, to proceed to get up by surprise and after a short chase, the polar bear launches a scintillating claw directly at the seal's skull, ensuring capture of its prey with a bite to the neck.
The second technique that the polar bear uses to hunt, and it is also the one that it uses the most to obtain food, is to lie in wait in an area that the seals use to come out to breathe. These vent areas are usually gaps or holes that the seals make in the ice to alternatively exit to breathe in the middle of their fishing parties in the ice-covered waters of the arctic cap.
The moment a seal sticks its nose out of the water to breathe, the stalking bear gives it a beastly claw from above, in order to fracture the seal's skull. The polar bear uses the same technique when it decides to hunt belugas, which are saltwater cetaceans, relatives of the dolphins.
hunted in burrows
Polar bears are also capable of detecting seal pups hidden among burrows dug beneath the ice. They use their sense of smell to do this, and when they manage to locate the pup's specific location, they throw themselves with all their might onto the top of the frozen burrow where the pup is hiding, collapsing on top of it.
In the summer time, polar bears can exhibit even more daring predatory behavior, daring to hunt caribou, reindeer, even birds, and have been seen collecting eggs in the nesting areas of arctic birds.
Polar Bear Behavior
A special characteristic of the polar bear is that it does not have a hibernation phase, as do its relatives of other species of ursus. Polar bears survive the harsh winters of the pole through a process that allows them to accumulate fat in the winter season, which they then lose in the summer season.
This cycle allows them to do two things: heat their body in winter, due to body fat; and then be able to refrigerate it in the summer, thanks to the loss of fat. A particularity is that during the entire breeding season, the females do not take food, losing up to 50% of their body weight.
Regarding polar bear reproduction, females only tolerate males of the species between the months of April and May, which is their mating season. Once the mating season has passed, behavior between males and females can be described as hostile, especially if the female is breeding, because male polar bears are cannibalistic and, if hungry, can devour the cubs or even other bears.
Polar Bear Conservation
It is very sad that the polar bear is today at a very important risk of extinction. extinction Due to the various activities carried out by humans. After having managed to evolve and adapt for a period of more than 4 million years, scientists and researchers now believe there is a possibility that this beautiful species could become extinct by the middle of this century.
One of the most worrying causes of the decline in the population of white bears is the activity related to oil exploitation and the pollution that it entails, and another is climate change and greenhouse gases, which are the main threats to these spectacular animals, whose only predator is man.
The impact that climate change has on the population of polar bears can be seen in the changes that have occurred in the ecosystem they inhabit. The sustained rise in the temperature of the Arctic Ocean has produced an accelerated thaw of the permafrost and the large area of floating ice in which the polar bear hunting area is located.
climate change and oil
Irregular melting has been the reason bears cannot muster the fat reserves their bodies require to move efficiently from one season to another. Another consequence of this is that the impossibility of accumulating fat affects their fertility, which has decreased by 15%, according to the most recent studies.
Regarding oil, much is said, but little is done to avoid impacting the Arctic zone, which, as everyone knows, is an area full of deposits of this hydrocarbon. The effects observed in their habitat thanks to the action of man have made white bears dare to venture into populated areas in search of food, even among the garbage.
Curiosities
The truth is that polar bears do not have white hair, it is actually translucent and the optical effect produced by the environment in which they live makes it look white like snow in the winter time, and with a color similar to ivory. in the less cold seasons.
Another interesting fact is that these hairs are hollow and filled with air inside, which allows the bear to provide great thermal insulation, save energy, and retain the body heat it needs to survive in the harsh temperatures of the Arctic.
The fur of the polar bear is black, which allows the polar bear to better absorb solar radiation. The white bear does not drink water, because the water in its habitat is salty and acidic. So the polar bears' way of hydrating is through the blood of the animals they eat. Another curiosity is that the life expectancy of the polar bear is between 30 or 40 years.
We recommend these other interesting articles:
-
Mammals