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Polar Bears
Known scientifically as Ursus Maritimus, the polar bear is native to the Arctic Circle, and is the world's largest carnivore species found on land. It is classified as a vulnerable species, with 5 of the`9 polar bear subpopulations in decline. They have a reputation as the only animal that actively hunts humans, but in fact, anything they encounter is potential prey.
1,835 Questions
How many species live in the polar region?
Polar bears are in the phylum Chordata, which contains 2 species.
What mechanism explains why polar bears are white and bears found farther south have a darker color?
Since Polar bears live in arctic climates surrounded by ice and snow, over the years white fur was naturally selected in their population as a dominant trait that gave a competitive advantage. White Polar bears blend in more easily with their surroundings, enabling them to sneak up on their prey and make hunting easier. Non-white Polar bears eventually became extinct because of this hunting disadvantage. millmillhot321:well,actually their fur is actually not colored. their fur is see-through. it's like a little tube. it's white because of the sun. look up Polar Bears, a book on polar bears that's where i learend it.
yes a polar bear has enemies . a walrus andsome ethier stuff. Enemies: Other polar bears and humans (1) directly, and (2) indirectly by humans through loss of habitat for oil exploitation, sea pollution and global warming. Bear cubs are volurable to wolves.
whales
Does the kodiak bear live in the tundra?
The Kodiak bear (Ursus arctosmiddendorffi), also known as the Kodiak brown bear or the Alaskan grizzly bear or American brown bear, occupies the islands of the Kodiak Archipelago in South-Western Alaska. Its name in the Alutiiq language is Taquka-aq. It is the largest subspecies of brown bear.
Why does a polar bear migrate?
Not really. They don't travel far distances like whales and most birds do, they stay in the same area year after year. Sows "migrate" inland during the winter to hibernate and give birth to her cubs, but then travel out to the sea to begin hunting. During the short summer months polar bears are found on the mainland close to the ocean living off of lichens and lemmings and probably some berries, not venturing out to the ocean.
Polar bears will move inland during the winter to build their dens, which could be considered migrating. However, they don't do it cross-country like birds do, and don't move too far.
Where do polar bears get their nutrients from?
bears get energy from eating healthy foods like berries and fish they could also get energy by running or getting excercise every day
Why do polar bears need sea ice?
Polar bears eat seals. Seals swim faster than bears do, so the bears need a big area of ice floating on the sea. The bear waits by a hole in the ice. When a seal comes up through the hole for air, the bear is ready. Polar bears need food, and that's why they need ice. I don't know why or whether they need snow.
Do saltwater crocodiles swimout to sea?
There are three related species - crocodile, alligator and ghariyal. Crocodiles have active lingual (on tongue) glands that can secrete salt - these glands are present also in alligators but aren't active. That's why crocodiles can live in the ocean where alligators can't survive for long (ghariyal is a purely freshwater species with no such gland at all).
Though the crocodiles are poor swimmers, the larget living reptile, called the estuarine crocodile (Crocodylus porosus) can ride sea waves and cross the sea to another nearby land area. They live in mangrove forests or estuaries near the seashore.
In what way is a polar bear suited to its environment?
their fur is white is a a great camouflage against man trying to hunt them, they have several layers of fur and fat to protect them against the cold, they have small ears so there ears can keep warm and there blood can't take the heat away.
They are so well insulated that they give off no detectable heat when out on the ice, and are invisible to infrared (heat-sensing) photography except for a small spot just in front of their nose, made by exhaled breath. On cold days they may dig a hole, curl up and even cover their nose with a paw. On warm days, they pant, may sleep anywhere in almost any position, and may be sprawled out with unfurred foot pads waving in the air.
Contrary to popular belief, the polar bear's fur neither acts like a fiber optic nor "solar heating" system. All visible light is reflected (which is why we see the bear as white), and UV light (which is present in the Polar Region only for the warmest, 4 months of full summer light) is only superficially absorbed at the ends of the guard hairs. The skin is also black, enabling the bear to absorb UV rays and thus keep warm. However, a polar bear's primary insulation is by the thick fat pad. They also have slightly webbed feet that make them great swimmers. They have an extra eyelid that is transparent, it lets them see while under water and at the same time protects the cornea of the eye. They long snout helps warm the inhaled air before it gets to the lungs.
What do polar bears look like when they are born?
They stay with there mams until there big and strong then they eat your face off!
How long have poler bears been endangered?
The Polar Bear has been on the IUCN Red List since 1982, listed as "vulnerable". The U.S. Fish and Wildlife Services, Endangered Species List added the Polar Bear in May, 2008 with a "threatened" status. So, the Polar Bear has been on the IUCN Red List for 27 years, and on the U.S. FWS Endangered Species List for almost one year. For more details, please see sites listed below.
Bears typically kill their prey using powerful jaws and sharp claws. They may ambush their target, using their strength to overpower it. Depending on the species, bears can employ different hunting techniques; for instance, grizzly bears often use a surprise attack, while polar bears may stalk seals on ice. Once caught, they use their physical prowess to deliver fatal bites or strikes, ensuring a quick kill.
Can polar bears walk backwards?
Yes, Polar Bears are able to walk backwards. I'm not sure what, why, or who studied this and put the research data together. But it would seem, that when most Polar Bears deficate, or go to the bathroom, they have a certain procedure they go through. This involves walking backwards several steps. They will walk backwards, taking larger steps with the front paws than, with the back ones, and in about five to six steps their front paws are almost on top of their back paws. This causes their "bum" to stick out, and then they can answer the call of nature, by lifting their stubby little tail deficating. For more details, I can't imagine there are, many more than this, but please see the sites listed below.
They are Endothermic
Does a polar bear weigh more then a horse?
No.
It's possible. A large male can be nearly 1500 pounds, and there is a disputed record of a male polar bear of 2100 pounds.
Why do polar bears get called polar bears?
Polar bears live at the polar region (the Arctic) of the world, and are only found there, unlike other bears. This is why they're called "polar bears."
The polar bear is called a polar bear because it is a bear, and lives in the area of North pole in the Arctic.
So Don't Be Fooled When You Think That Polar Bears Eat Penguins. Because They Live In Diffrent Places.
I am pretty sure they eat fish, or berries, but not squid.
The difference between polar bears and Eskimos?
For a start, the koalas is not a bear, but the polar bear is. The word "bear" is not even part of the koala's name. Differences include:
- Koalas are marsupials, giving birth to undeveloped young which complete their development in the female koala's pouch. Polar bears give birth to live young which are fully developed.
- Baby koalas are called joeys, while baby polar bears are called cubs.
- Koalas are endemic to Australia alone. Polar bears are found in Arctic regions.
- Koalas are herbivorous, feeding only on eucalyptus leaves, flowers and bark. Polar bears are carnivorous, i.e. meat-eaters, feeding on live prey.
- Baby koalas drink mother's milk during their first 6-7 months of life. After 30 weeks, the mother produces a substance called pap. This substance is actually a specialised form of the mother's droppings which, having passed through her digestive system, give the joey the enzymes it needs to be able to start digesting the tough gum leaves, making an easier transition for the baby koala to start eating eucalyptus leaves. Polar bears make a simpler transition from mothers' milk to meat, and no such preparation is required.
- Koalas are essentially grey in colour, while polar bears are white.
- Koalas are arboreal, or tree-dwelling, while polar bears live on the ground.
- Koalas are much smaller than polar bears.
- Two of the koala's digits on their forelimbs act as opposable thumbs, enabling koalas to reach out and grasp the leaves they want. Polar bears do not have any such feature or capability with their paws.
What animal is similar to the polar bear?
Grizzly bears. They share some habitat areas. Eat alot of the same things, and even cross-breed occasionally. Grizzlies can also swim, but they can't tolerate the frigid waters as well. Their closer habitat companions, seals, are also mammals that share habitat areas. Both hunt for fish, but the seal is also a prey animal for the Polar bear.
Grizzlies and Polar Bears interbreed. That makes them pretty closely related. See link
Grizzlies and Polar Bears interbreed. That makes them pretty closely related. See link
Why are polar regions cooler than equatorial regions?
The polar regions get the least amount of warming rays from the Sun.
How is a polar bear born with an egg or from a mom?
Polar Bears are mammals, and give live birth to usually one or two cubs.
Impossible to say. Polar bears live all across the Arctic Circle, in several countries. They are superbly camouflaged and don't gather in herds. Methods of counting them are very general and scientists hope they are reasonably accurate. But we can't tell how many are dying.
Are polar bears at risk of being endangered?
The polar bear is not listed with a status of endangered now, this may be due in part to the foresight of the five nations that agreed to make the polar bear a priority, and protect them by signing the International Agreement on the Conservation of Polar Bears. They are currently listed as "Threatened" by the US Fish and Wildlife Services, Endangered Species List, and the IUCN Red List, has them listed with a status of "Vulnerable" and the "population trend of decreasing".
Yes, the Polar Bears are an indangered spaecies
The polar bear is not yet an endangered species. However, it was recently considered to be a threatened species, meaning it is at risk for becomming endangered.
No, they are listed as vulnerable.
The polar bear is listed as vulnerable by the IUCN.
The polar bear is currently listed as "Vulnerable", with a population of nearly 25000.
Yes. The Arctic Polar Ice Cap is melting, possibly due to Global Warming, and this is the Polar Bears' natural habitat. They can not compete in open water or on dry land, as they tend to feed on seals that are below the ice, breaking through the ice to capture them.
Yes. The Arctic Polar Ice Cap is melting, possibly due to Global Warming, and this is the Polar Bears' natural habitat. They can not compete in open water or on dry land, as they tend to feed on seals that are below the ice, breaking through the ice to capture them.
No, no Government or science group claims this. Political groups do, but they are ignoring the growing numbers.
No they are not, but are considered threatened. See IUCN Redlist.
yes they are indangerd
How do polar bears walk on such thin ice when they weigh so much?
They break through thin ice as they have amazing power in there shoulders, which when pushed against the ice breaks.
