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Grizzly bear

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Grizzly Bear
Grizzly2.jpg
Scientific Classification
Trinomial

Ursus arctos horribilis

The Grizzly bear (aka Silvertip Bear) is the king of the Northern Hemisphere. It is an omnivore, and a subspecies of the Brown bears. The Grizzly bear is on the endangered species list, although it has no enemies except man.

Anatomy

The Grizzly bear can weigh 400-1500 lb. It can also stand about 7 feet tall. The male is bigger, on average 1.8 times heavier than the female. Their fur coats can range in color from blond to brown or even black. The Grizzly bear is characterized by a hump which most other bear don’t have. Its shoulder is a solid mass of muscle used for digging. The bear can run at speeds of 35 to 40 mph.

Reproduction

Grizzly sow and cub in Shoshone National Forest, Wyoming, U.S.

All bears reproduce sexually. Grizzlies reach breeding maturity between four and five years of age. But some bears don’t reach maturity until they are eight years old. The female grizzly bear will produce 1-4 cubs every two years. The cubs are small and weigh about 500g. The cubs are born in January while the mother is hibernating. More then 50 percent of the cubs die during hibernation. Bears are good parents that discipline their offspring. They are willing to defend them to the death. The mother will care for her young for about 2.5 years before the cubs leave. The male bear will not care for the cubs.

Ecology

Map of the grizzly bear's current and historical range in North America.

Grizzly bears live in a range that extends from Alaska down into western Canada and into the upper northwest United States. In the United States bears are found in the mountains regions of Wyoming, Montana, Idaho and Washington near the border with British Columbia. They usually are found in open tundra areas but can also be found in temperate rain forest habitats and even in open grasslands. They live 50 to 300 square miles apart from each other. About 80 to 90 percent of the grizzly's food is green vegetation, wild fruits and berries, nuts, and roots. They also eat big game such as elk, moose calves or smaller mammals, and salmon during certain parts of the year. They also eat ground squirrels, fish and insects. Most commonly, however, they can only catch the newborn young of large species.

Gallery

Related References

See Also