Polar Bear

The Polar Bear.

Information
Write the first section o The  polar bear  ( Ursus maritimus ) is a  carnivorous   bear  whose native range lies largely within the  Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is a large bear, approximately the same size as the  omnivorous   Kodiak bear  ( Ursus arctos middendorffi ). [3]  A boar (adult male) weighs around 350–700 kg (770–1,500 lb), [4]  while a sow (adult female) is about half that size. Although it is the sister species  of the  brown bear, [5]  it has evolved to occupy a narrower  ecological niche , with many body characteristics adapted for cold temperatures, for moving across snow, ice, and open water, and for hunting the  seals  which make up most of its diet. [6]  Although most polar bears are born on land, they spend most of their time at sea. Their scientific name means " maritime  bear", and derives from this fact. Polar bears hunt their preferred food of seals from the edge of  sea ice, often living off fat reserves when no sea ice is present.

The polar bear is classified as a  vulnerable species, with eight of the nineteen polar bear subpopulations in decline. [7]  For decades, large scale hunting raised international concern for the future of the species but populations rebounded after controls and quotas began to take effect. [citation needed]  For thousands of years, the polar bear has been a key figure in the material, spiritual, and cultural life of  Arctic   indigenous peoples, and polar bears remain important in their cultures. f your page here.

Height and Weight
Write the second section of The polar bear is a large bear, similar in size to the  Kodiak bear, which is a subspecies of  brown bear. [37]  Adult male polar bears weigh 350–700 kg (770–1,500 lb) and measure 2.4–3 m (8–10 ft) in total length. [38]  The  Guinness Book of World Records  listed the average male as having a body mass of 385 to 410 kg (849 to 900 lb) and a shoulder height of 133 cm (4 ft 4 in), slightly smaller than the average cited for male Kodiak bears. [39]  Around the  Beaufort Sea, however, mature males reportedly average 450 kg (1,000 lb). [40]  Adult females are roughly half the size of males and normally weigh 150–250 kg (330–550 lb), measuring 1.8–2.4 metres (5 ft 11 in–7 ft 10 in) in length. Elsewhere, a slightly larger estimated average weight of 260 kg (570 lb) was claimed for adult females. [41]  When pregnant, however, females can weigh as much as 500 kg (1,100 lb). [38]  The polar bear is among the most  sexually dimorphic  of mammals, surpassed only by the  pinnipeds  such as  elephant seals. [42]  The largest polar bear on record, reportedly weighing 1,002 kg (2,209 lb), was a male shot at  Kotzebue Sound  in northwestern Alaska in 1960. [39]  This specimen, when mounted, stood 3.39 m (11 ft 1 in) tall on its hindlegs. [39]  The shoulder height of an adult polar bear is 122 to 160 cm (4 ft 0 in to 5 ft 3 in). [39] <sup class="reference" id="cite_ref-43" style="font-family:sans-serif;line-height:1em;unicode-bidi:-webkit-isolate;">[43]  While all bears are short-tailed, the polar bear's tail is relatively the shortest amongst living bears, ranging from 7 to 13 cm (2.8 to 5.1 in) in length. <sup class="reference" id="cite_ref-44" style="font-family:sans-serif;line-height:1em;unicode-bidi:-webkit-isolate;">[44]

<p style="margin-top:0.4em;margin-bottom:0.5em;line-height:19.1875px;font-family:sans-serif;">Compared with its closest relative, the brown bear, the polar bear has a more elongated body build and a longer skull and nose.<sup class="reference" id="cite_ref-first_24-1" style="line-height:1em;unicode-bidi:-webkit-isolate;">[24]  As predicted by Allen's rulefor a northerly animal, the legs are stocky and the ears and tail are small.<sup class="reference" id="cite_ref-first_24-2" style="line-height:1em;unicode-bidi:-webkit-isolate;">[24]  However, the feet are very large to distribute load when walking on snow or thin ice and to provide propulsion when swimming; they may measure 30 cm (12 in) across in an adult.<sup class="reference" id="cite_ref-lw2_45-0" style="line-height:1em;unicode-bidi:-webkit-isolate;">[45]  The pads of the paws are covered with small, soft papillae (dermal bumps) which provide traction on the ice.<sup class="reference" id="cite_ref-first_24-3" style="line-height:1em;unicode-bidi:-webkit-isolate;">[24]  The polar bear's claws are short and stocky compared to those of the brown bear, perhaps to serve the former's need to grip heavy prey and ice.<sup class="reference" id="cite_ref-first_24-4" style="line-height:1em;unicode-bidi:-webkit-isolate;">[24]  The claws are deeply scooped on the underside to assist in digging in the ice of the natural habitat. Research of injury patterns in polar bear forelimbs found injuries to the right forelimb to be more frequent than those to the left, suggesting, perhaps, right-handedness.<sup class="reference" id="cite_ref-46" style="line-height:1em;unicode-bidi:-webkit-isolate;">[46]  Unlike the brown bear, polar bears in captivity are rarely overweight or particularly large, possibly as a reaction to the warm conditions of most zoos.

<p style="margin-top:0.4em;margin-bottom:0.5em;line-height:19.1875px;font-family:sans-serif;">The 42 teeth of a polar bear reflect its highly carnivorous diet.<sup class="reference" id="cite_ref-first_24-5" style="line-height:1em;unicode-bidi:-webkit-isolate;">[24]  The cheek teeth are smaller and more jagged than in the brown bear, and the canines are larger and sharper.<sup class="reference" id="cite_ref-first_24-6" style="line-height:1em;unicode-bidi:-webkit-isolate;">[24]  The dental formula is  <span style="display:block;line-height:1em;padding-right:0.1em;padding-left:0.1em;" title="upper dentition: Incisors.Canines.Premolars.Molars">3.1.4.2 <span style="display:block;line-height:1em;padding-right:0.1em;padding-left:0.1em;border-top-width:1px;border-top-style:solid;" title="lower dentition: Incisors.Canines.Premolars.Molars">3.1.4.3

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