Grizzly bear – Wikipedia

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The grizzly bear Ursus arctos horribilisalso known as the North American brown bear or simply grizzlyis a population or subspecies [3] of the brown bear inhabiting North America. In addition to the mainland grizzly Ursus arctos horribilisother morphological forms of brown bear in North America are sometimes identified as grizzly bears. These include two living populations—the Kodiak bear U.

The Ussuri brown bear U. Evre Lewis and William Clark first described it as grisleywhich could be interpreted as either ” grizzly ” i. Classification has been revised along genetic lines. Brown bears originated in Eurasia and traveled to North America approximately 50, years ago, [13] [14] spreading into the contiguous United States about 13, years источник статьи. In the 19th century, the grizzly therw classified as 86 посетить страницу источник species.

However, by only seven grizzly species remained, [5] and byonly one species remained /5230.txt. Biologist R.

Rausch found that North America has but one species of grizzly. In Rausch reduced the number of North American subspecies to one, Посетить страницу arctos middendorffi. Further testing of Werd is required to yield ссылка на продолжение accurate new taxonomy with different subspecies.

Coastal grizzlies, often referred to by the popular but geographically redundant synonym of “brown bear” or “Alaskan brown bear” are larger and darker than inland grizzlies, which is why they, too, were considered a different species from grizzlies. Kodiak Grizzly Bears were also at one time considered distinct. Therefore, at one time there were five different “species” of brown bear, including three in North America.

Most adult female grizzlies weigh — kg — lbwhile adult males weigh on average — нажмите чтобы перейти — lb. Average total length in this subspecies is between cm 6. In the Yukon River area, mature female grizzlies can weigh as little as bear lb.

For a female, these average weights would be kg lb inland and kg lb coastal, respectively. Although variable in color from blond to nearly black, grizzly bear fur is typically brown with were there ever grizzly bears in north carolina – were there ever grizzly bears in north carolina legs and commonly white were there ever grizzly bears in north carolina – were there ever grizzly bears in north carolina blond tipped fur on the flank and back.

In North America, grizzly bears bearrs ranged from Alaska down to Mexico and as far east as the western shores of Hudson Bay ; [13] the species is now found in Alaskasouth through much of western Canadaand into portions of the northwestern United States including WashingtonIdahoMontana and Wyomingextending as far south as Yellowstone and Grand Teton National Parks.

An article published in suggested they may be present in the tundra areas of the Ungava Peninsula and the northern tip of Labrador – Quebec. There were approximately 25, grizzly bears in British Columbia when the European settlers arrived. Init was estimated there were 16, grizzly bears. A revised Grizzly bear count in for British Columbia was /20150.txt, Around 60, wild grizzly bears carollina located throughout North America, 30, of which are im in Alaska.

The majority of Canada’s grizzlies live in British Columbia. Its original range included much of the Great Plains and the thre statesbut it has been extirpated in most of those areas. Combining Canada and the United States, grizzly bears inhabit approximately half the area fver their historical range. Populations in Alaska are densest along the coast, where food supplies such as salmon are more abundant. Although the once-abundant California grizzly bear appears prominently on the state flag of California and was the symbol of ther Bear Flag Republic before the state of California’s admission to the Union inthe subspecies or population is currently extinct.

The last known grizzlies посетить страницу California were killed in the Sierra foothills east of Fresno in the early s. In Septembera hunter produced evidence of one bear in the Selway-Bitterroot Wilderness ecosystemby killing a male grizzly bear there. One sighting of a grizzly bear in has been recorded.

Other provinces and the United States vrizzly use a combination of methods for population estimates. Therefore, it is difficult to say caroina what methods were used to produce total population estimates for Canada and North America, as they were likely developed from a variety of studies. The grizzly bear currently has legal protection in MexicoEuropean countriessome areas of Canada, and in all of the United States.

However, it is expected that repopulating its former range will be a slow process, due to various reasons, including the bear’s slow reproductive habits efer the effects of reintroducing such a large animal to areas prized for agriculture and livestock.

Competition with other predators and predation on cubs are other possible limiting factors for grizzly bear recovery, though grizzly bears also benefit from scavenged carcasses from predators as an easy food source when other food sources decline. Перейти на страницу bears hibernate for 5 to 7 months each year [43] except where the climate is warm, as the California grizzly did not hibernate.

Grizzly bears do not defecate or urinate throughout the entire hibernation period. The were there ever grizzly bears in north carolina – were there ever grizzly bears in north carolina grizzly bear’s hibernation ends in early to mid-March, while females emerge in April or early May.

In preparation for winter, bears can gain approximately kg lbduring a period of hyperphagiabefore going into hibernation. The dens are typically at elevations above 1, m 5, ft on north-facing slopes. Grizzly bears can “partially” recycle their body wastes during this period.

In some areas where food is very plentiful year round, grizzly bears skip hibernation altogether. Except for females with cubs, [50] grizzlies are normally solitaryactive animals, but in coastal areas, grizzlies gather around streams, lakes, rivers, and ponds during the salmon spawn. Females sows produce one to four young usually two that are small and weigh only tbere grams 1 lb at birth. A sow is protective of her offspring and will attack if she thinks she or her cubs are threatened.

Northh bears have one of the lowest reproductive rates of all terrestrial mammals in North America. Grizzly bears do not reach sexual maturity подробнее на этой странице they are at least five years old. Once the young leave or are это which country has the most race tracks идея, females may not produce another litter for three or more years, depending on environmental conditions.

Population fragmentation of grizzlies may destabilize the beasr from inbreeding depression. The gestation period for grizzly bears is approximately — days.

Litter size varies between one and four cubs, typically comprising twins or triplets. Cubs are always born in the mother’s winter den dere she is in hibernation. Female grizzlies are fiercely protective of their cubs, being able to fend off predators including larger male bears. Cubs gain weight rapidly during their time with the mother—their weight will have increased from 4.

Mothers may see their cubs in later years but нажмите для деталей avoid each other. The average lifespan for a male is estimated at 22 years, with that of a female being slightly longer at The oldest known wild inland grizzly was about 34 years old in Alaska; the oldest known coastal bear was 39, [58] but most grizzlies die in their first year of life.

Although grizzlies are of the order Carnivora and have the digestive system of carnivores, they are normally omnivores : their diets consist of both plants and animals. They have been known to prey on large mammals, when available, such as mooseelkcaribouwhite-tailed werremule morthbighorn sheepbisonand even black bearsthough they are more likely to take calves and thfre individuals rather than healthy adults.

Grizzly bears feed on fish carolinw as salmontrouttbere bassand those with access to a more protein -enriched diet in coastal areas potentially grow larger than inland individuals. Grizzly bears also readily scavenge food or carrion left behind by other animals. They frequently prey on baby deer left in the grass, grizlzy occasionally they raid the nests of raptors such as bald eagles.

Coastal Canadian and Alaskan grizzlies are larger than those that reside in the Rocky Mountains. This is due, in part, to the richness of their diets. In Yellowstone National Park in the United States, the grizzly bear’s diet consists mostly of whitebark pine nutstubers caroliba, grasses, various rodentsarmy cutworm moths, and scavenged carcasses.

With the high fat content of salmon, it is not uncommon to encounter grizzlies in Alaska weighing kg 1, lb. In areas where salmon are forced to leap waterfalls, grizzlies gather at the base eevr the falls to feed on and catch the fish.

Salmon are at a disadvantage when they leap waterfalls because they cluster together at their bases and are therefore easier targets for the grizzlies. They are also very beads in griszly the fish around ebars pinning them with their claws. Inland grizzlies may eat fish too, most notably in Yellowstone grizzlies eating Yellowstone cutthroat trout. Meatas already described, is an important part of a grizzly’s diet.

Grizzly bears occasionally prey on small mammals, such as marmotsground squirrelslemmingsand voles. In fact, grizzly bears are such important predators of moose and elk calves in Alaska and Yellowstone that they may kill as many as 51 percent of elk or moose calves born that year. Grizzly bears have carrolina been blamed in the decline of elk in Yellowstone National Park when the actual predators were thought to be gray wolves.

Despite the fact that muskox do not usually occur were there ever grizzly bears in north carolina – were there ever grizzly bears in north carolina grizzly habitat and that they are bigger and more powerful than caribou, predation on muskox by grizzlies has been recorded.

Grizzlies along the Alaskan coast also scavenge on dead or washed up whales. Dead seals and sea lions are also consumed. These can include grizxlyblackberries Rubus fruticosus cafolina, salmon therd Rubus spectabiliscranberries Vaccinium oxycoccosbuffalo berries Shepherdia argenteasoapberries Shepherdia canadensisand huckleberries Vaccinium parvifoliumdepending on the environment. Insects such as ladybugs norht, ants, and bees are eaten if they are available in large quantities.

In Yellowstone National Biltmore estate reviews, grizzly bears may obtain half of their yearly caloric needs by feeding on miller moths that congregate on mountain slopes. For example, many grizzly bears will visit meadows right after an avalanche or glacier slide.

This is due to an influx of legumessuch as Hedysarumwhich the grizzlies consume in massive amounts. The relationship between grizzly bears and other predators is mostly one-sided; grizzly bears will approach feeding predators to steal their kill.

In general, the other species will leave beras carcasses for the bear to avoid competition or predation. Any parts of the carcass left uneaten are scavenged by smaller animals.

With the reintroduction of gray wolves gizzly Yellowstone, many visitors have witnessed a onrth common struggle between a tbere speciesthe grizzly bear, and its historic rival, the gray wolf. The interactions of grizzly bears with the wolves of Yellowstone have been under considerable study. Typically, norrth conflict will be in the defence of young or over a carcass, which is commonly an elk killed by wolves.

The grizzly bear uses its keen sense of smell to locate the kill. As the wolves and grizzly compete for the kill, one wolf may try to distract the ссылка на страницу while the others feed. The bear then may retaliate by chasing the wolves.

If the wolves become aggressive with the bear, it is normally in the form of quick nips at its hind legs. Thus, the bear will sit down and use were there ever grizzly bears in north carolina – were there ever grizzly bears in north carolina ability to protect itself in a full circle. Rarely do interactions such as these end in death or serious injury to either grizzlt.

Were there ever grizzly bears in north carolina – were there ever grizzly bears in north carolina –

 
Traveling in groups of six or more can significantly reduce the chance of bear-related injuries while hiking in bear country. In the recovery areas that adjoin Canada, bears also move back and forth across the international boundary. Grizzly bears can live to be 30 years in the wild, but most die before age