The polar bear's body is long and streamlined, with a long neck and small head. Adult males are 7 to 91/2 ft (210-290 cm) long, stand 4 to 41/2 ft (122-137 cm) at the shoulder, and weigh 700 to 1,600 lbs (320-730 kg). Females are somewhat smaller. The extremely dense fur appears yellowish white but is in fact unpigmented. Unlike other bears, polar bears have hairy soles, which help them grip the ice. They may attain a running speed of 25 mi (40 km) per hr on ice.
Polar bears are omnivorous, but feed chiefly on marine animals such as seals and young walruses. Quite fearless, they will stalk any animal, including humans. They take advantage of carcasses left by hunters, and in summer eat vegetation on the shore. If food is scarce, their physiology can slow to a state known as walking hibernation.
Except for a brief courtship in summer, polar bears are solitary. Males and nonpregnant females are thought to wander all winter. A pregnant female makes a winter den in the snow; two tiny, helpless cubs are born in January and nursed in the den until March. They usually remain with the mother for about a year and a half, while learning to hunt.
Polar bears have been extensively hunted, especially by Eskimos, for fur, flesh, and ivory, and they have declined greatly in numbers. Although extremely dangerous to humans, they do well in captivity. In recent years, changes in sea ice cover in the Arctic appears to have placed some populations of polar bears under stress, and has led the U.S. government to classify the bear as threatened. Polar bears are classified in the phylum Chordata, subphylum Vertebrata, class Mammalia, order Carnivora, family Ursidae.
Adult bears are solitary except during the mating season. Groups may feed together where quantities of food are available, but there is little social contact. In cold climates bears sleep through most of the winter in individual dens made in caves or holes in the ground. This sleep is not a true hibernation, as the bear's metabolism remains in a normal state and it may wake and emerge during warm spells. The young, usually twins, are born during winter in a very immature state. Cubs stay with their mothers for about a year, and females usually mate only every other year. Bears are not generally subject to predation, unless they are in a weakened condition. A bear is a formidable adversary and may attack a human if it is injured or startled.
The brown bear of Eurasia, Ursus arctos, is extinct in much of Western Europe, but small numbers survive in some wooded sections of that region and larger numbers in Russia and N Asia. The Russian variety was the bear most often trained to dance and box in circuses and shows in the past.
The Asian black bear, or moon bear, Selenarctos thibetanus, is found in forests from central Asia and the Himalayas to Japan. The sun bear, Helarctos malayanus, is found in tropical forests of SE Asia. Smallest of the bears, it is about 4 ft (120 cm) long and weighs about 100 lb (45 kg). It spends much time in trees and is fond of honey; it is sometimes called honey bear (a name also applied to the kinkajou). The sloth bear, Melursus ursinus, is a medium-sized bear of the forests of S India and Sri Lanka.
The North American brown bears, including the Kodiak bear and grizzly bear, are regarded by many authorities as varieties of U. arctos. Brown bears are dish-faced; i.e., their muzzles curve upward in profile. Their shoulders are humped. They range in color from yellow-brown to nearly black, with much color variation among different varieties, local populations, and individuals. Most varieties do not climb well. The Kodiak bear, or big brown bear, is the largest living member of the Carnivora, sometimes reaching a length of 9 ft (2.7 m), a shoulder height of 41/2 ft (140 cm), and a weight of over 1,600 lb (730 kg). It is found along the south coast of Alaska and, like the Siberian brown bear, eats large numbers of salmon during salmon runs.
The most widespread and numerous North American bear is the so-called black bear, U. americanus, found in Alaska, Canada, the Great Lakes region, mountainous areas of the United States, and on the Gulf Coast. American black bears range in color from light brown to black; in northern regions there are gray and nearly white forms. Their muzzles are always cinnamon brown and are straight in profile. They are further distinguished from brown bears by their smaller size and by their hindquarters, which are higher than their shoulders. Males are usually about 6 ft (190 cm) long and weigh about 500 lb (230 kg).
The polar bear, Thalarctos maritimus, is an almost exclusively carnivorous species of the Arctic. The only bear of the Southern Hemisphere is the spectacled bear, Tremarctos ornatus, of the Andes Mts.; it is so called from the light-colored circles around its eyes. Recent evidence suggests also including the giant panda, Ailuropoda melanoleuca as a bear.
Bears are classified in the phylum Chordata, subphylum Vertebrata, class Mammalia, order Carnivora, family Ursidae.
See R. Perry, Bears (1970).
See biography by A. Barra (2005).
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Polar bear (Ursus maritimus).
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Smallest member (Helarctos malayanus) of the bear family (Ursidae), found in South Asian forests. Nocturnal and tree-climbing, the sun bear weighs 60–140 lbs (27–64 kg) and is 3–4 ft (1–1.2 m) long, with a 2-in. (5-cm) tail, large forepaws, and short black fur with an orange-yellow crescent on the chest. It uses its long, curved claws to tear or dig for insect nests, particularly those of bees and termites. It also eats fruit, honey, and small vertebrates. The sun bear is shy and intelligent; legends say that its chest crescent represents the sun.
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Only South American species of bear (Tremarctos ornatus, family Ursidae), found in mountain forests, especially in the Andes. It feeds mainly on shoots and fruit and is an agile climber. It stands about 2 ft (60 cm) at the shoulder, is 4–6 ft (1.2–1.8 m) long, and has a 3-in. (7-cm) tail. Its shaggy coat is dark brown to black. Whitish to yellowish marks form its “spectacles” and often extend down the neck to the chest.
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Wolverine (Gulo gulo).
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Long-tailed nocturnal raccoonlike carnivore (Ailurus fulgens, family Procyonidae) that inhabits high mountain forests in the Himalayas and adjacent eastern Asia. It is 20–26 in. (50–65 cm) long, excluding the 12–20-in. (30–50-cm) bushy, faintly ringed tail. It weighs 6–10 lbs (3–4.5 kg) and has soft, thick, reddish brown fur. The face is white, with a red-brown stripe from the eyes to the mouth. It eats plants, especially bamboo, and fruits and insects. Though an agile climber, it mostly feeds while on the ground.
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Koala (Phascolarctos cinereus).
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Grizzly bear (Ursus arctos horribilis).
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American black bear (Ursus americanus).
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Shaggy-haired, characteristically brown species (Ursus arctos) of bear with numerous races native to Eurasia and to northwestern North America. North American brown bears are usually called grizzly bears. Eurasian brown bears are generally solitary animals, able to run and swim well, and usually 48–84 in. (120–210 cm) long and 300–550 lbs (135–250 kg). They feed on mammals, fish, vegetable materials, and honey. The exceptionally large Siberian brown bear is similar in size to the grizzly.
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In securities and commodities trading, a declining market. A bear is an investor who expects prices to decline and, on this assumption, sells a borrowed security or commodity in the hope of buying it back later at a lower price, a speculative transaction called short-selling. Seealso bull market.
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Either of two species of North American plants that make up the genus Xerophyllum, in the lily family. The western species, X. tenax, also known as elk grass, squaw grass, and fire lily, is a smooth, light-green mountain perennial with a stout, unbranched stem and grasslike, rough-edged leaves at the bottom. It flowers at five to seven years, bearing a large cluster of small, creamy white flowers at the top of the stem. The turkey beard (X. asphodeloides) of southern North America is a similar plant that grows in dry pine barrens. In the southern and southwestern U.S., the name bear grass is given to various kinds of yucca and to the camas (Camassia scilloides) and the aloelike Dasylirion texanum.
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Generally massive, short-legged mammals constituting the family Ursidae. Bears are the most recently evolved carnivore, found in Europe, Asia, and the Americas. Closely related to the dog and the raccoon, most bears climb with ease and are strong swimmers. As a family, they are omnivores, but dietary preferences vary among species (the polar bear feeds mainly on seals, the spectacled bear on vegetation, etc.). Though they do not truly hibernate, bears often sleep fitfully through much of the winter. They live 15–30 years in the wild but much longer in captivity. They have been hunted as trophies, for hides, and for food. Seealso black bear; brown bear; sun bear.
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Aardvark (Orycteropus afer).
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Lake, Northwest Territories, Canada. Lying astride the Arctic Circle, it was visited before 1800 by North West Company traders and later named for the bears that inhabited its shores. Containing many small islands, Great Bear Lake is roughly 200 mi (320 km) long and 25–110 mi (40–175 km) wide and has a maximum depth of 1,356 ft (413 m). It is the largest lake entirely within Canada and the fourth largest in North America. The lake's waters abound with fish, including the speckled trout.
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(born Sept. 11, 1913, Kingsland, Ark., U.S.—died Jan. 26, 1983, Tuscaloosa, Ala.) U.S. collegiate football coach. He was an all-state tackle in high school and went on to play blocking end at the University of Alabama (1932–36). As head coach at the University of Kentucky (1946–53), his team won 60 games, lost 23, and tied 5. After coaching at Texas A&M University (1954–57), he returned to Alabama (1957–82). His Alabama coaching record of 323 wins, 85 losses, and 17 ties broke Amos Alonzo Stagg's long-standing coaching record for games won; in 1985 it was broken by Eddie Robinson of Grambling State. In all, he took Alabama to 28 bowl games and six national championships.
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