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Topic: Polar Bear

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	About Polar Bears: Camelot Bears of Williamsburg, Virginia, USA.
		The preferred habitat of Polar Bears is the polar regions of the Northern Hemisphere.
		Polar Bears are the most carnivorous of all the bears and live almost entirely on ring seals, and to a lesser degree, on bearded seals.
		Polar bears mate from late March to late May. Implantation of the fertilized egg is delayed until September or early October and the cubs are born between late November and early January.
	www.camelotbears.com /bears/polar-bears/polar_bears_about_us.html (713 words)

	San Francisco Zoo \| Animals \| Polar Bear (Site not responding. Last check: )
		Polar bears do roam the ice floes of the Arctic Ocean, and are occasionally found on land in Canada, Alaska and Greeland.
		Polar bears are found in arctic coastal areas, on ice many miles from shore and occasionally inland.
		Polar bears are protected by the Marine Mammal Act, and are managed by five countries (Canada, Denmark, Norway, Russia and the United States) to control nuisance bears, to provide food, clothing, income and cultural experiences for native peoples, and to prevent extinction.
	www.sfzoo.org /cgi-bin/animals.py?ID=18 (686 words)

	Polar Bear - Wikipedia, the free encyclopedia
		The polar bear is a circumpolar species found in and around the Arctic Ocean whose southern range limits are determined by pack ice (their southernmost point is James Bay in Canada).
		A polar bear's nose and skin are fl and the fur is translucent despite its apparent white hue.
		Polar bears do not hibernate, though the lactating females will not emerge from their cave while the cubs are very young.
	en.wikipedia.org /wiki/Polar_bear (1879 words)

	Polar bear - Simple English Wikipedia
		The Polar Bear (Ursus maritimus) is a large bear that lives in the Arctic.
		Polar Bears have white fur, but it can become a bit yellowish because of the sunlight.
		When Polar Bears hunt, they often wait at holes in the ice, where the pinnipeds come up to breathe.
	simple.wikipedia.org /wiki/Polar_bear (219 words)

	Polar Bear Facts
		Polar bears are usually found in the northern marine areas of Alaska, the Commonwealth of Independent States, Norway’s Svalbard Archepelago, Greenland and Canada (Lynch 1993, p 5).
		Polar bears must take advantage of the good hunting to prepare for the times when their stored body fat is the key to survival.
		Polar bears and adult walruses are rivals, occasionally coming into contact while feeding on whale carcasses or in the process of killing seals.
	www.bear.org /Polar/Polar_Bear_Facts.html (1999 words)

	Polar Bear (Site not responding. Last check: )
		HABITAT The preferred habitat of polar bears is the annual ice adjacent to the shorelines of the continents and archipelagos throughout the circumpolar Arctic.
		Although polar bears have been recorded as far north as 88", they rarely enter the zone of heavy multiyear ice of the central polar basin because it is unproductive biologically and there is little to eat.
		REPRODUCTION Polar bears mate from late March to late May. Implantation of the fertilized egg is delayed until late September to early October and the cubs are born between late November and early January.
	www.bearbiology.com /polarbear.htm (680 words)

	LiveScience.com - Study: Polar Bear Genitals are Shrinking
		The genitals of polar bears in east Greenland are apparently dwindling in size due to industrial pollutants.
		Polar bears from northernmost Norway, western Russia and east Greenland are among the most polluted animals in the Arctic, as they feast on ringed seals and bearded seals.
		The adult polar bear testicles the researchers examined were on average roughly three inches across and 1.8 ounces in weight, although they could dramatically enlarge during the height of sexual activity from January to July.
	www.livescience.com /animalworld/060823_polar_bears.html (518 words)

	Polar Bear: Wildlife Notebook Series - Division of Commercial Fisheries - Alaska Department of Fish and Game
		Polar bears (Ursus maritimus) are of special interest because of their large size, white color and position as the top trophic level carnivore in the remote arctic environment.
		Adaptions by the polar bear to life on sea ice include a white coat with water repellent guard hairs and dense underfur, short furred snout, short ears, teeth specialized for a carnivorous rather than an omniverous diet, and hair nearly completely covering the bottom of the feet.
		Bears prey to a lesser extent on bearded seals, walruses, and beluga whales.
	www.adfg.state.ak.us /pubs/notebook/marine/polarbea.php (1312 words)

	Polar Bear
		Polar bears have fur that is made up of "hollow guard hairs." Sometimes when polar bears live in zoos that are in a warmer climate, they can have algae growing inside the hollow guard hairs of their fur.
		Polar bears are usually solitary except for female-cub groups, during mating season, and at abundant food sources.
		Polar bears find a seal air hole and sneak up on it slowly and sit there until a seal comes up to breathe and then they scoop him right out of the hole.
	library.thinkquest.org /3500/polarbear.htm (509 words)

	WWF - WWF-Canon Polar Bear Tracker
		Polar bear N23731 was spotted with her cubs during a recent field trip and we expect N23881 to enter the maternity den for the first time this winter.
		It allows us to get regular updates about how the polar bears behave in their arctic environment and how they may be affected by climate change.
		There are more than 22,000 polar bears in the Arctic, but this could change if the Arctic continues to warm at twice the rate as the rest of the world.
	www.panda.org /polarbears (387 words)

	Polar bears in recent decades
		Polar bears have long captured the attention of the general public but probably at no time in the past have they been more in the forefront of the public's imagination than today.
		Today's heightened interest in polar bears may be due in part to an enhanced understanding of the ecology of polar bears, their environment, and an increased interest in Arctic issues brought on by concerns for climate change.
		Polar bears, as an apical predator that tends to amplify the accumulation organochlorines compounds, are a perfect candidate for studies in evaluating trends.
	www.arctic.noaa.gov /essay_schliebe.html (1621 words)

	Animal Planet :: Corwin's Carnival of Creatures (Site not responding. Last check: )
		Polar bears are found in the Arctic, typically inhabiting islands and coastlines.
		Polar bears have been known to attack humans, but most often when humans live nearby and food is scarce in the polar bear's home range.
		Polar bear cubs stay with their mother until they are about 2 or 3 years old.
	animal.discovery.com /fansites/jeffcorwin/carnival/bearcave/polar.html (647 words)

	BBC - Science & Nature - Wildfacts - Polar bear
		Polar bears are large and stocky with hind limbs that are longer than the forelimbs, and a long neck.
		Polar bears must spend over 50 per cent of their time hunting, and less than two per cent of attempts to catch seals are successful.
		Polar bears are the most likely species to kill humans for food, as they assume anything they encounter is potential prey.
	www.bbc.co.uk /nature/wildfacts/factfiles/7.shtml (541 words)

	ABC-KID.com - Polar Bear Pictures For Kids
		Polar bears are found in arctic in areas where they can eat seals on open sheets of ice.
		Polar bears were first brought into a zoo in ancient egypt.
		The bears in ancient zoos did not have cold water to swim in or live fish to catch and this was terrible for them.
	www.abc-kid.com /polarbear (369 words)

	Polar Bear (Site not responding. Last check: )
		Polar bears are at risk of extinction because global warming is causing catastrophic environmental change in the Arctic, including the rapid melting of sea ice.
		Because the bears are deeply dependent on the sea ice for their survival, they stand to become the first mammals in the world to lose 100 percent of their habitat to global warming.
		Scientists have already recorded thinner bears, lower female reproductive rates, and reduced juvenile survival in the Western Hudson Bay polar bear population in Canada, which is at the southern edge of the species’ range and the first to suffer impacts from global warming.
	www.biologicaldiversity.org /swcbd/species/polarbear/index.html (929 words)

	Polar Bears on Thin Ice - NRDC's BioGems
		Yet at this moment, the polar bear's Arctic habitat is literally melting away beneath it due to global warming.
		Scientists predict that 80 percent of the summer sea ice that polar bears depend on for survival could be gone in 20 years, and all of it by 2040.
		Polar bears are one of the world's strongest swimmers but four were found drowned in the Bering Strait.
	www.savebiogems.org /polar (495 words)

	Polar Bear
		Ahpun is a female polar bear that was orphaned as a cub in the spring of 1998.
		Polar bears have one of the slowest reproduction rates of all mammals, with cubs staying with their mother for up to 3 years.
		Polar bears in the wild have a varied existence including periods of long travel, encounters with prey, interactions with other bears, etc. While some of these activities are difficult to reproduce in captivity, others are easily accomplished.
	www.alaskazoo.org /willowcrest/polarbearhome.htm (1420 words)

	Largest Land Carnivore \| Polar Bear
		Polar bears' paws are massive compared to their body size if you compare them with other bears.
		Polar bear cubs are too tiny at first to tolerate the extreme cold of their native habitat.
		Polar bear cubs will stay with their mother for as long as 30 months before she, or a prospective mate, will drive them away to fend for themselves.
	www.extremescience.com /PolarBear.htm (1255 words)

	WSBTV.com - Health - Pollutants May Shrink Genital Size, Study Says
		Polar bears from East Greenland, Svalbard, and the Western Russian Arctic are the most OHC-polluted species in the Arctic because they rely on blubber from mainly ringed seals and bearded seals, according to the study.
		The study, published in the journal Environmental Science and Technology, suggests that the impact on the size of polar bear genitalia may pose a risk to the east Greenland polar bear subpopulation in the future because of reduced sperm and egg quality and quantity and uterus and penis size and robustness.
		The life-span and adult survival of polar bears are among the highest for mammals in general, while the reproductive rates are among the lowest for terrestrial mammals.
	www.wsbtv.com /health/9762284/detail.html (470 words)

	Comparative Mammalian Brain Collections: Polar bear (Ursus maritimus)
		Polar Bears are pure white following the spring molt, but their fur may become yellowish in the summer.
		The neck of a polar bear is longer than that of other bears and their heads are relatively smaller and flatter.
		Polar Bears feed primarily on ringed seals, which they catch at or near their breathing holes in the pack ice.
	brainmuseum.org /specimens/carnivora/polarbear/index.html (358 words)

	WWF \| Polar Bears \| Ecology
		Polar bear populations can be found in northern Canada, Greenland, Norway and Russia, and there have been reports that polar bear tracks have been found as far north as the North Pole.
		Polar bears hunt ringed and bearded seals on the sea ice, between late April and mid-July, by breaking into seal dens in the sea ice.
		Ongoing research funded by WWF is finding that polar bears are left with less time on the ice to hunt for food and build up their fat stores, and increased time on land where they must fast.
	www.worldwildlife.org /polarbears/ecology.cfm (913 words)

	Polar Bear
		The sample size was 55 polar bears (24 males and 31 females) in 20 partner zoos; this represented close to 50% of the North American captive polar bear population.
		Of the bears that did exhibit stereotypical behavior, there seemed to be a seasonal effect that was sex-dependent: Males engaged in stereotypical behavior more in the first two quarters of the year, while females engaged in stereotypical behavior more in the first and fourth quarters of the year.
		Polar bears are part of a short food chain in which they are the apex predator.
	www.polarbearsalive.org /pbhc_day2.htm (3035 words)

	Polar Bear - Defenders of Wildlife
		Polar bears’ long neck and narrow skull aid in streamlining the animal in water, and their large, flat and oar-like front feet make them strong swimmers.
		Polar bears are distributed throughout the arctic region in 19 subpopulations.
		Pregnant polar bears need to eat a lot in the summer and fall in order to build up sufficient fat reserves for surviving the denning period, during which time they give birth to one-pound cubs and then nurse them to about 20-30 pounds before emerging from the den in March or April.
	www.defenders.org /wildlife_and_habitat/wildlife/polar_bear.php (653 words)

	ANIMAL BYTES - Polar Bear
		In addition to their size and color, polar bears may also be distinguished from other bear species by their smaller ears, longer necks and the lack of a dorsal hump in adults.
		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 at zoological parks provide opportunities for the public to learn about these animals and how human activities may impact their survival.
	www.seaworld.org /animal-info/animal-bytes/animalia/eumetazoa/coelomates/deuterostomes/chordata/craniata/mammalia/carnivora/polar-bear.htm (622 words)

	Scott Polar Research Institute » Kids' pages
		Polar Bears have 42 teeth, which they use for catching food and for aggressive behaviour.
		The incisors are used to shear off pieces of blubber and flesh; the canines grasp prey and tear tough hides; the jagged premolars and molars chew, but Polar Bears swallow most of their food in chunks rather than chewing.
		The Polar Bear is completely furry except for the nose and soles of feet which are fl.
	www.spri.cam.ac.uk /resources/kids/polarbears.html (369 words)

	POLAR BEAR - Arctic Wildlife (Site not responding. Last check: )
		The polar bear waits by the seal's breathing holes in the ice and quickly snatches the seal when it pokes its head out of the hole.
		Polar bears are able to swim in the icy Arctic Ocean without freezing.
		Polar bears are found near the town of Churchill (Canada).
	www.saskschools.ca /~gregory/arctic/pbear.html (454 words)

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