Polar bear Animal Information In English.The polar bear is an institution animal. Bears are found mainly in the Northern Hemisphere. There are eight species in total and the spectacled bear is found in South America. Both the dog and the bear are descended from the same ancestor from their fossils. All bears except pandas appear to be brown or black in color. Only their hair colors are different.
Polar bears are the largest carnivorous land mammals on Earth. They are about seven to eight feet long, measured from the nose to the tip of their very short tail. Male polar bears are much larger than the females. A large male can weigh more than 1,700 pounds, while a large female is about half that size (up to 1,000 pounds). Bears can weigh about 50 percent more after a successful hunting season than they do at the start of the next; most of this additional weight is accumulated fat. A newborn polar bear weighs only about 1.5 pounds.
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Polar Bear Animal Information In English |
Many of the polar bear's physical adaptations help it maintain body heat and deal with its icy habitat. The bear's outer layer of fur is hollow and reflects light, giving the fur a white color that helps the bear remain camouflaged. The skin under the polar bear's fur is actually black; this black is evident only on the nose. Polar bears also have a thick layer of fat below the surface of the skin, which acts as insulation on the body to trap heat. This is especially important while swimming and during the frigid Arctic winter. The bear's large size reduces the amount of surface area that's exposed to the cold per unit of body mass (pounds of flesh), which generates heat.
The polar bear's footpads have a kind of “non-slip” surface, allowing them to get traction on slippery ice. Polar bears have strong legs and large, flattened feet with some webbing between their toes, which helps with swimming and walking on ice. The wide paws prevent sea ice from breaking by distributing the polar bear's weight as it walks. The webbed feet results in making polar bears, unlike other bear species, considered to be “marine mammals” along with seals, sea lions, walruses, whales, and dolphins.
Polar Bear Animal Information In English
The bear found in the icy regions of the Antarctic Ocean is white in color. If you look at it, their body color is black but the hair on their body is white, so we see them as white bears.
- Name - Polar Bear
- Kingdom - Animal
- Film - Chordata
- Class - Mammals
- Order - Carnivora
- Infraorder - Arctoidea
- Family - Ursidae
Polar bears have a thick layer of body fat and their hairy skin that repels water protects them from cold and water. Polar bears are excellent swimmers. They have a speed of six miles per hour and these animals run forward using their hind paws. Also, these fish catch and eat seals in the sea. So let's know the detailed information about the polar bear.
Background on the Polar Bear in English
Historic Laplanders feared and respected the polar bear so much that they refused to speak its name for fear of angering it. Instead, they referred to polar bears indirectly as the “old men in the fur coat” or “God’s dogs.”
Other cultures had various names. The Inuit named them “wandering ones,” the Kets call them “grandfathers,” and British naval officer CJ Phipps first gave them the scientific binomial name, Ursus maritimus, meaning “sea bear.”
Where do Polar bears live?
Polar bears live on the ice-covered waters of the Arctic and countries
around the Arctic Circle, including Canada, Alaska in the U.S., Greenland (part
of Denmark), Norway, Russia and occasionally Iceland, according to the International
Union for Conservation of Nature (IUCN). They are not found in Antarctica,
where penguins live.
Some polar bears stay on permanently frozen sea ice in the Arctic Basin, but
most live on the annual sea ice that forms around the Arctic Basin. This annual
sea ice melts in the summer, so polar bears are forced to spend several months
on land while they wait for it to freeze over again, according to the IUCN.
Polar bears swim between sea ice and the shore, hunting down prey, searching
for mates, or just cooling off. They paddle through the water with their big
front paws and use their back legs as rudders, according to Sea World. They also
have webbing between their toes, similar to ducks' feet, which helps them swim.
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Polar bears have been recorded swimming for nearly 10 days at a time and traveling up to 427 miles (687 kilometers) in a single swim without stopping to rest, Live Science previously reported. Long swims like this put polar bears at risk of drowning, but they may be forced to undertake such great journeys more often as warming temperatures associated with climate change melt sea ice in the Arctic.
What do Polar bears eat?
Polar bears are the most carnivorous bear species and almost exclusively eat
meat. Their primary prey are ringed seals (Pusa hispida), according to
the National Wildlife Federation. Polar bears will sit by a seal breathing hole
waiting for a seal to pop up so they can grab it. The bears will also sniff out
seal dens, then crash through the roof and kill the seals inside.
If polar bears have a plentiful supply of seals and are in good health, they'll only eat the seal's blubber, according to Polar Bears International. This is the highest calorie meal available to polar bears and helps them build up fat reserves and stay healthy between feedings. Polar bears can consume 4.4 pounds (2 kg) of fat each day, according to the World Wildlife Fund (WWF).
Polar bears will also hunt walruses, sea birds, fish and small mammals such
as rodents; scavenge on whale carcasses and other dead animals; and eat small
amounts of vegetation, according to the University of Michigan's Animal
Diversity Web (ADW). However, these are alternative food sources when seals
aren't plentiful; seals are crucial to sustaining a polar bear population.
Polar bears are top of the food chain and have no natural predators other than
humans.
Breeding in English
Polar bears reach maturity between the ages of 3 and 5 years. Females
typically have their first litter at 5 or 6 while most males do not breed until
8 or 10. Female polar bears give birth every 2-3 years and have around five
litters during their lifetime—one of the lowest mammalian reproductive rates.
The mating season runs from late March through May. Males travel great
distances and have been known to follow a female for 62 miles to find a mate. A
breeding pair stays together for a week and mates several times during that
period. The polar bear gestation period is 8 months, though the development of
the embryo is about 4 months. The gestation period includes delayed
implantation, an evolutionary strategy in which the blastocyst simply floats in
the uterus and does not implant in the uterine wall until conditions are
optimal for its survival. Females often refrain from mating if they do not have
substantial food sources or the necessary fat reserves.
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Pregnant females must eat a great deal throughout the summer and autumn to prepare for hibernation; a pregnant female needs to gain around 441 lbs to sustain both herself and her cubs throughout her pregnancy. Cubs are born while the females are hibernating. Their litter size can range from 1 to 4 cubs but is typically 2. They are born blind, hairless, and deaf. Within the first month of life, their eyes open, and within 2 months, they grow teeth and fur and begin to walk. Cubs weigh around 1 pound at birth but are nursed to a weight of 20-30 pounds by the time they leave the den in March or April.
Maternity dens are typically dug in south-facing snowdrifts on thick stable
pack ice at sea, or on hilly and mountain slopes on land. Dens usually contain
an entrance tunnel leading into several concave rooms with an inside
temperature up to 40 degrees warmer than the outside, maintained by body heat
and insulation from the snow.
In the weeks immediately following hibernation, mothers and cubs continue to stay close to the den as the cubs acclimate to the outside world. During this time, they spend the majority of the time in the den and often sleep there at night. When they are ready, they leave the den and travel toward the edge of the sea ice, where the thin and hungry mother bears that have not eaten for months immediately begins to hunt, giving her cubs a first lesson in how it’s done.
Life in the cold in Polar Bears in English
Polar bears are solitary except for when a mother is raising her cubs.
However, unrelated bears will occasionally be seen together, such as when they
share a large whale carcass or garbage dump, or when they are waiting on land
for sea ice to re-form, according to Sea World. They do not defend territories,
but polar bears may occasionally fight over a carcass, and males may fight over
a female during the breeding season, between March and June.
Male polar bears find females by following their scent, and the pair may spend a week or more with each other. After mating, fertilized eggs don't enter the female's uterus straight away, and this process is delayed until usually September or November, according to the San Diego Zoo.
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Polar bears have a gestation period of up to about seven months including this delayed implantation. Pregnant females will dig a cave in a snowbank to give birth in; called a maternity den. Polar bears do not hibernate in winter, unlike most brown bears and black bears, and will continue to hunt unless the weather is extremely harsh.
What is a Polar Bear's Habitat?
Polar bears live in countries bordering the Arctic Circle: Canada, Russia, Greenland, Norway, and the United States (in Alaska). Temperatures are normally around minus 29 degrees Fahrenheit (minus 34 degrees Celsius) in the Arctic during the winter and can reach as low as minus 92 F (minus 69 C). The temperature of the water is also cold, touching, according to PBS Nature, as low as 28 F (minus 2 C), the freezing point of the seawater. Many of the physical adaptations help it retain heat in the body and cope with its icy habitat.
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The outer layer of the fur of the bear is hollow and absorbs light, giving a white colour to the fur that lets the bear stay camouflaged. In fact, the skin under the fur of the polar bear is black; this black is noticeable only on the nose. Polar bears often have a dense layer of fat below the surface of the skin, which serves as heat-trapping protection for the body. While swimming and during the cold Arctic winter, this is particularly necessary. The large size of the bear decreases the amount of surface area that is exposed to the cold per unit of heat-generating body mass (pounds of flesh). These are all important factors in a Polar Bear habitat.
What is the Polar Bear lifespan?
Polar bears can live up to the age of 30 in the wild, but this is rare. Before they reach 25 years old, most adults die. The conditions that are emerging in Hudson Bay are such that women will no longer be able to give birth and raise a few cubs successfully. The adult bears will live until they die of old age when this occurs and the population will be doomed. Scientists are concerned that as the amount of Arctic ice begins to shrink, this trend is also beginning to occur in the more northern polar bear populations.
Threats for Polar Bear lives in English?
- Global warming around the globe (pack ice melting, less hunting time)
- Ocean emissions (poisonous chemicals, crude oil)
- Overfishing (less food for the seals)
- Disturbances caused by raw material extraction, military use, shipping, tourism
- Company Hunts (in some populations)
- Illegal trade in the products of polar bears (e.g. gall bladders)
How fast can polar bears move?
A roaming polar bear walks at about 5 kph (3 mph). That speed gets cut in
half if it is a mother bear leading her cubs. A polar bear can run up to
about 40 kph (25 mph), which is the lower end of speeds reached by galloping
horses.
Because polar bears are so bulky, they expend a large amount of calories
when sprinting. In fact, it has been estimated that a polar bear would be
unlikely to gain the calories back from a kill after sprinting for more than
about 10 seconds.
Polar bears can swim about 10 kph (6 mph) and with their
buoyant bodies can cover astonishing distances. The current
swimming distance record for a polar bear is 686 km (426 miles) non-stop.
Social Structure and Behavior Polar bears in English
Polar bears generally lead solitary lives, with the exception of mothers
raising cubs and breeding pairs. Mothers are highly affectionate and attentive
to their cubs, and cubs spend much time playing, chasing and tackling one
another. Many bears do congregate at large kill sites, such as areas with large
whale carcasses. And some adult and sub-adult males, however, sometimes form
friendships which can last weeks or sometimes even years. These males may
travel, feed, and play-fight together.
Though polar bears are not territorial, aggression occurs between males
competing for breeding females, in mothers protecting cubs, and in cases where
bears may try to steal or scavenge food from another’s kill.
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Polar bears can communicate using a broad variety of vocalizations, such as growling, hissing, panting, snorting, teeth champing, whimpering, braying, lip-smacking, and chuffing. Cubs typically vocalize more than adults, and mothers communicate extensively with their cubs. In addition to vocalizations, she may use her muzzle, paws, and body to comfort, protect, or discipline her cubs.
Males may initiate play-fighting by approaching another male with its head
down and its mouth closed while avoiding eye contact. They gently touch the
face and neck of the other bear with its nose or mouth. Once play-fighting is
initiated, both bears stand on their hind legs and try to push each other over
with their paws.
Polar bears can travel thousands of miles yearly, swimming and walking, following the pack ice to hunt. Polar bears are excellent swimmers. They can swim at speeds of up to 6 mph, and can swim continuously for 62 miles. Some have been observed swimming 200 miles from land. They swim with their head and some of their back above the water in a doggy paddle style. Their back paws are held flat like rudders while their front paws propel them through the water. They are good divers and can dive at least 10-15 feet below the surface. Polar bears walk in a distinctive swinging gait.
Their average walking speed is 3.4 mph, and they can run up to 25 mph. However, they usually move slowly and rest frequently to prevent overheating. Because of their heavy build and particular gait, they require more energy to move at a particular pace than other animals. Like humans, they walk on the soles of their feet, touching the ground with their heels first. Like other bears, they can stand and walk on their two hind feet for brief amounts of time.
Feeding in English
Polar bears are considered to be marine mammals because they depend upon seals and the marine environment for their existence. They feed mostly on ringed seals, but they also catch bearded seals, harp seals, hooded seals, and harbour seals. Occasionally, they may also kill walruses, belugas or white whales, and narwhals.
During the winter and spring, adult ringed seals maintain breathing holes in
the fast ice by constantly scratching the ice with the heavy claws on their
foreflippers. Younger seals are more abundant in areas where there is some open
water during winter, such as adjacent to shore leads and polynyas, or stretches
of areas of open water surrounded by ice, because it is easier to breathe there
and they are able to avoid dominant adult seals that are more abundant in the
fast ice.
The polar bears’ large front paws are useful for hunting seals. When the seal
comes up to the breathing hole for air, the polar bear kills it and flips it
out of the water with a single blow of its paw.
During April and May, polar bears, especially females accompanied by dependent
cubs, hunt for newborn ringed seals, or whitecoats, in their birth lairs in the
underside of the snowdrifts that cover the seals’ breathing holes. After
smashing into the lairs and killing the seals, the bears eat mainly the fat and
skin, often leaving much of the meat for scavengers. Seal pups and their
mothers constitute the main part of the spring diet of polar bears, except for
the nursing cubs.
Bears also stalk basking seals on land-fast ice or ice pans. During spring and
early summer, when seals are most accessible, a bear may catch one every four
to five days. The bear eats the fat as quickly as possible before another bear
smells the kill and comes to compete for some of the carcass.
When the bears come ashore in areas where the pack ice melts during the summer,
they can no longer hunt seals. They live mainly on their fat stores and
conserve energy by remaining inactive over 80 percent of the time. They will
scavenge on carcasses if they find them, and adolescents and females
accompanied by dependent young, in particular, will occasionally eat grasses
and berries. Bears have even been seen diving for seaweed and trying to catch
seabirds sitting on the water by swimming underwater and coming up beneath
them. Very few cases of bears killing and eating caribou and muskoxen are
known.
Types of Polar Bears in English
There are eight types of polar bears. These include the American black bear, Asiatic black bear, spectacled bear, sloth bear, sun bear and brown bear. So let's see the detailed information about these Types of bears
Polar bear :- Polar bears are considered to be the largest animals and their body length ranges from two to two and a half meters. Their weight is up to 400 kg. Often polar bears weighing more than 500 kg have been found. These bears are seen roaming the shores of the Arctic Ocean, Canada.
Their color is whitish, often yellowish due to oil contamination. When temperatures rise in summer, they are protected by a thick layer of fat under their skin. Polar bears prefer to live in families. Often these fish move alone and prey on sea hares etc.
Black Bears :- Black bears are found in Canada, northern USA, except in the Great Plains. Also, these bears live in dense forests and open areas. The location of black bears, however, varies seasonally as they migrate. In northern and eastern regions they are very large and their body length ranges from 1.2 to 1.9 meters. Also, their height is up to one meter.
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Himalayan Bear :- This bear is found in the regions from Rayong in South East Asia to North China, Japan and Taiwan. These bears also live in subtropical and tropical forests. Their body length is up to two meters and the weight of a male bear is up to 200 kg and a female is up to 150 kg.
It has long hair on its body and a white V-shaped mark on its chest. A collar of long hair appears on the neck. These bears look very beautiful and attractive and they climb trees. Often the chicks or eggs in the nests are also eaten.
Polar bears are the biggest bear species, but Kodiak bears, a subspecies, or type of brown bear, can grow to about the same size as some polar bears. Kodiak bears live on islands in the Kodiak Archipelago off southern Alaska, where they have been isolated from other brown bears for about 12,000 years, according to the Alaska Department of Fish and Game. These brown bears can stand over 10 feet (3m) tall on their hind legs and weigh up to 1,500 pounds (680 kg), according to the Alaska Department of Fish and Game.
Some sources, such as the Alaska Department of Fish and Game, claim that
Kodiak bears are the largest bears on Earth. The confusion is partly due to the
way that "largest" is defined, because the answer varies depending on
whether bears are measured by length, weight, or by the largest individual ever
recorded, according to the Library of Congress in Washington, D.C. Polar bears
are heavier and taller on average, but individual Kodiak bears may be larger
than average-size polar bears.
Are Polar Bears Dangerous to Humans in English
Polar bears rarely attack humans. A 2017 study published in the journal Wildlife
Society Bulletin cataloged 73 confirmed polar bear attacks between 1870 and
2014, including 20 fatalities. The researchers found that nutritionally
stressed male bears were most likely to attack humans and that most attacks
were predatory, meaning the bear was killing for food. Polar bear attacks
increased over the study period, which is likely due to changes in their
environment.
"The danger is the proximity to people, coupled with an increasing number
of polar bears in poor body condition spending more time on shore. Both people
and bears are trying to adapt to rapid changes on the ground and at sea,"
Geoff York, study co-author and senior director of conservation at Polar Bears
International, said in a statement at the time. As sea ice declines and moves
further from the shore, more polar bears spend longer periods on land, such as
in Hudson Bay in northeastern Canada.
"Bears are now having to make a choice as the ice melts each year: Do
they stay on the ice and retreat with it into deep Arctic waters or do they
jump, come to shore, and take their chances on land?" York said.
"Those who come ashore may come into conflict with human communities or
activities. And as they get more desperate for food, they may well take higher
risks."
Are Polar bears endangered in English
Polar bears are vulnerable to extinction, according to the IUCN Red List of Threatened Species. Climate change poses the biggest threat to their long-term survival as increasing temperatures cause the Arctic sea ice they depend on to shrink. They are also threatened by other human-related activities, such as oil and gas drilling in the Arctic, which increases the risk of negative human-bear interactions.
There are only about 26,000 polar bears living in the wild, according to the
IUCN. However, estimating the number of polar bears is difficult because they
live in such remote habitats at low densities, and information about their
subpopulations is often poor or outdated. Polar bears are listed on the U.S.
Endangered Species List as threatened and are protected under the Marine Mammal
Protection Act.
Inuit and Indigenous people still hunt polar bears for food and clothing as part of long-held cultural traditions, but this hunting is carefully regulated. The Inuit people have long believed that polar bears, which they call "Nanuq," are wise, powerful and almost human, according to Polar Bears International.
What are Polar bear mating rituals like?
Mating generally takes place in late spring, in April or May. A male polar bear (starting around six years old) will follow the scented tracks of a fertile female (around four or five years old), often dueling other males in vicious fights that can leave both combatants with scars and broken teeth.
The victorious male will then mate with the female for a week, at which point the impregnated female will go off to gorge on food and store up as much fat as possible, doubling her weight. Around August or September, the female polar bear will dig herself a den on land (never on the ice floes). She will then hunker down into a state much like hibernation. She will not sleep, and her temperature will not drop like it would in true hibernation, but her heart rate slows from an average of 45 beats a minute to 25 beats.
The polar bear cubs (two on average) will be born between November and
February. Polar bear cubs weigh around 450-700 g (1.0 to 1.5 lbs) at birth. The
family will then stay holed up in their den while the babies feed on
milk until mid-February to mid-April. Polar bear cubs spend another
10 to 15 days close to the den until they get more experience with the
world outside, then they set off with their mothers on the slow march back to
the seal hunting grounds.
Fun Facts in Polar Bears in English
- Adapted for the cold, polar bears have a thick fur coat. The coat of a polar bear can appear in a number of color variations from pure white to creamy yellow to light brown, depending on season and angle of light. A polar bear's black skin absorbs heat from the sun, helping it stay warm. In addition, the long guard hairs of a polar bears coat can trap a still layer of water in the under-fur and help insulate the bear's body while submerged; acting in a similar manner to a wetsuit.
- Polar bears also possess a fat layer that can reach a thickness of up to 11 cm (4.3 in.) This fat layer acts as an energy reserve in times of low food availability and possibly also aids in thermoregulation.
- Polar bears are strong swimmers, paddling dog-style with their partially webbed front paws while holding their hind feet and legs flat like rudders. Scientists have tracked polar bears swimming continuously for 100 km (62 mi.). On land they are capable of reaching speeds of 40 kph (25 mph) while running in short bursts.
- Only female polar bears, especially pregnant females, enter into a state of carnivore lethargy or "hibernation." They do so from October or November through March or April. During hibernation, the female's heart rate slows from a normal resting rate of about 46 beats per minute to about 27 beats per minute. Females also fast throughout hibernation, losing all or most of their fat stores. Though hibernating females sleep soundly, they are easily aroused.
- Unlike most other hibernators, female polar bears give birth while hibernating. Sows give birth in their dens from November through January. Typically, 2 cubs are born. Cubs are born helpless with their eyes closed, and appear hairless because of their very fine fur. Cubs open their eyes within the first month and begin walking at 2 months. At 4 to 6 months of age, cubs emerge from the den. By 8 months, they weigh more than 45 kg (99 lbs.).
- For more information about polar bears, explore the Polar Bear Info Book.
What you can do to help Polar bears in English
A big
factor to help reduce the threat of polar bears becoming extinct is to help
reduce climate change. This is something that we can all make an impact on
individually. Polluting gases from electricity and burning fossil fuels such as
coal and oil have hit polar bears hard, as it's causing ice caps to melt,
resulting in further habitat loss.
Here are
some actions you can take to help polar bears:
- Use cars less. Try walking
more or if possible switch to an electric car.
- Use less energy. Try to
switch to eco-saving light bulbs, as they use less energy and are better
for the environment.
- Recycle more! Avoid product
waste and try to avoid buying products that have lots of packaging, such
as plastic.
- Monitor electric use. When
you're not using an electronic item, switch it off. Try not to leave
things on stand-by mode.
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Destinations: Greenland, Svalbard
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Name: Polar bear (Ursus maritimus)
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Length: 2-2.5 metres (6.6 - 8.2
feet)
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Weight: From 300 kg (661 lbs)
for females to more than 700 kg (1,543 lbs) for males
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Location: Arctic
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Conservation status: Vulnerable
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Diet: Mainly seal but also
musk ox, reindeer, birds and bird eggs, whale carcass, walrus, other polar
bears, and plants
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Appearance: White and
yellow-white with black noses
Polar Bear FAQs (Frequently Asked Questions)
Are Polar Bears herbivores, carnivores, or omnivores?
Polar Bears are Carnivores, meaning they eat other animals.
What Kingdom do Polar Bears belong to?
Polar Bears belong to the Kingdom Animalia.
What is the true color of a polar bear?
Polar bears look white because their thick fur is scattering sunlight, which
is also white. Their actual skin is black.
Are polar bears aggressive?
Polar bears, unlike brown bears, are not territorial. They are normally
cautious in confrontations and usually choose to escape rather than fight.
What color is a polar bear’s tongue?
The tongue of a polar bear ranges from dark blue to black.
What are polar bears afraid of?
Polar bears have no natural predators and know no fear of humans, making
them extremely dangerous animals.
Where do polar bears sleep?
Polar bears typically curl up and dig shallow pits in the snow, sleeping
with their backs to the wind.
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