0 Grizzly Bear

 

Animal Unique | Grizzly Bear | Grizzly bears are a subspecies of the brown bears. A subspecies is a population of a species with unique physical, social or genetic traits that distinguish the species as a whole. They are also known as the Silvertip bear, the grizzly, or the North American brown bear generally live in the highlands of western North America. A large population of Grizzly bears living in the interior Alaska and Canada. Today, they can be found in certain areas of Montana, Idaho, Wyoming and Washington, such as Yellowstone National Park and Glacier National Park. Grizzly bears are found in forests, woodlands, meadows, valleys and rivers and streams.  

 

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Order:     Carnivora
Family:     Ursidae
Genus:     Ursus
Species:     U. arctos
Subspecies:     U. a. horribilis

Grizzly bears got their name because their brown fur can be tipped with white. This gives them a "gray" look. They are big brown bears. They have black noses and short, rounded ears. One of the most striking features of the grizzly bear is the hump on his back. The hump is a mass of muscles, which gives the bear extra power for running and digging. A pronounced bump appears on their shoulders, the bump is a good way to distinguish a black bear from a grizzly bear, black bears do not have this hump. Grizzly bears weigh up to 700 pounds. The males are heavier than females. 

 

Although the Grizzly bears are the order Carnivora and have the digestive system of carnivores, they are normally omnivores since their diet consists of both plants and animals. Their food consists of vegetable and animal foods. The plants are most commonly eaten fruits, nuts, grasses, fungi, moss and roots. If Grizzly bears are on the hunt, their prey fish, insects, mountain sheep, elk, and rodents. Grizzly bears feed on fish such as salmon, trout, and bass, and those with access to a more protein-enriched diet in coastal areas may be larger than interior individuals. Grizzly bears also easily catch food for bait left by other animals. Winter can be very stressful for wild animals because the season brings harsh weather and little food. Grizzly bears try to survive the winter by going into hibernation. During the summer and autumn, Grizzly bears build fat reserves by consuming large amounts of food. In late autumn or winter, they find a hill and dig a hole to serve as a protective shelter. When in the den, Grizzly bears slow their heart rate, temperature and metabolic activity and life of stored fat reserves.  

 

Depending on the weather and their fat, Grizzly bears can stay in the cave for more than 7 months. Their hibernation is not a true hibernation, as they can easily wake up from hibernation. Grizzly bears begin to search for friends in the late spring and early summer. Females mate with several males during the breeding season. If a female becomes pregnant grizzly, the development of the embryo is suspended for several months. The female spends the summer eating large amounts of food and store as much fat as possible. Fat is necessary for her and her boy to survive the winter. 

 

Grizzly bears can run quite fast, reaching speeds upwards of 40 miles per hour. They are also good swimmers. Young Grizzly bears climb trees to escape danger, but they lose this ability with age. Grizzly bears use sounds, smells and movements to communicate. They growl, moan or grunt, especially when women communicate with their young. Grizzly bears also rub their bodies on the ground and trees to delineate their territory and find mates. Except for cubs and females, Grizzly bears are normally solitary active animals, but in the coastal areas the grizzly comes together along streams, lakes, rivers and ponds during the salmon spawn. 

 

Most notable in Yellowstone are the interactions between gray wolves and Grizzly bears. With the reintroduction of gray wolves to Yellowstone, many visitors witnessed a once common struggle between a keystone species, the Grizzly bear and the historic rival, the gray wolf. Black bears generally stay out of grizzly territory, but Grizzly bears can occasionally enter black bear terrain to food sources both bears enjoy, such as pine nuts, acorns, mushrooms and berries to obtain. If a black bear sees a grizzly coming, it turns tail and runs or climbs a tree. Black bears are not the strong competition for prey, because they have a more herbivorous diet. Grizzly bears normally avoid contact with people. Despite their obvious physical benefits and many opportunities, they almost never see humans as prey, hardly contributes actively hunting people. Most grizzly bear attacks are the result of a bear that has surprised a very short distance, especially if it has a supply of food to protect or female Grizzly bear  protect their offspring.

 

The Grizzly bear is listed as threatened in the contiguous United States and endangered in parts of Canada. Environment Canada considered the Grizzly bear to a "special attention" species, because it is particularly sensitive to human activities and natural threats. All national parks such as Banff National Park, Yellowstone and Grand Teton, and Theodore Roosevelt National Park have legislation in place to protect bears. However, Grizzly bears are not always safe in parks. In Glacier National Park in Montana and Banff National Park in Alberta, grizzly bears are frequently slain by trains as the Bears captured for grain that has leaked from poorly maintained grain cars. Road kills on park roads are another problem.

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Detail: Grizzly Bear

0 Polar Bear

 

Animal Unique | Polar Bear | Polar bears live only in the northern Arctic where they spend most of their time on ice floes. They are the largest land carnivore in the world and the largest of the bear family. They are well suited for the cold Arctic ice and snow. Although most Polar bears are born on land, they spend most of their time at sea. Their scientific name means "marritme bear", and is derived from this fact. Polar bears can hunt their favorite food of seals in the edge of the sea ice, often of life fat if there is no sea ice present. The Polar bear is classified as a vulnerable species, with eight of the nineteen polar bear subpopulations in decline. For decades, large-scale hunting raised international concern about the future of the species, but populations rebounded after controls and quotas began to take effect. 

 

Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Mammalia
Order:     Carnivora
Family:     Ursidae
Genus:     Ursus
Species:     U. maritimus

The Polar bear is the largest terrestrial carnivore, which is more than twice as large as the Siberian tiger. It shares this title with the Kodiak Bear. Adult females are about half as big as men. The largest polar bear on record, reportedly weighing 1,002 kg, was a male shot at Kotzebue Sound in northwestern Alaska in 1960. The shoulder height of the Polar bear is 130-160 cm. The Polar bear is one of the most sexually dimorphic of mammals, surpassed only by the pinnipeds. 

 

Compared with its closest relative, the brown bear, Polar bear has a more elongated body build and a long skull and nose. As predicted by the northern line All for one animal, the legs are stocky and the ears and tail are small. However, the feet are very large for the load balancing while walking on snow or ice and slippery propulsion when swimming, they can measure 30 cm in an adult. The pads of the paws are covered with small, soft papillae (dermal bumps) which provide traction only on the ice. The Polar bear claws are short and stocky compared to that of the brown bear, perhaps to the earlier need for heavy prey and ice grip to serve. The claws are deeply scooped on the underside to help dig into the ice of the natural habitat. 

 

The Polar bear has many unique adaptations for dealing with the Arctic cold. The Polar bear skin is actually black, that makes it possible to enjoy as much heat as possible from the sun. They are also good swimmers and will swim from ice floe to ice floe. They are seen swimming 50 miles away from ice or land. The white fur is usually yellow with age. When kept in captivity in warm, humid conditions, the coat a pale shade of green due to algae growing in the top coat. Men have significantly longer hair on their legs, that the increase in length to the bear reached 14 years. The male ornamental foreleg hair is thought to attract females, where a similar function to the lion's mane. 

 

Unlike grizzly bears, Polar bears are not territorial. Although stereotyped as greedy aggressive, they are normally cautious in confrontations and often choose to escape rather than fight. Saturated Polar bears rarely attack unless provoked serious man, and hungry Polar bears are very unpredictable and are known to kill and sometimes eat people. Polar bears are stealth hunters, and the victim is often unaware of the presence of the bear to attack in progress. In general, adult Polar bears live solitary lives. Polar bears have a wide range of sounds, including bellows, roars, growls, steam locomotives and sapwood. 

 

Polar bears have fur, which consists of "hollow guard hairs." Sometimes when Polar bears live in zoos in warmer climates, they can grow algae in the hollow guard hairs of their fur. This makes them have a greenish tint to their fur. These hollow hairs keep their hair from matting down as they swim in water. Polar bears are usually solitary, except for female-cub groups during the mating season, and abundant food sources. Pregnant for the winter, but do not hibernate. All the Polar bears may temporarily avoid the bad weather. 

 

Climate change, leading to the loss of Arctic sea ice, is the leading threat to Polar bears.. The survival of Polar bears and the protection of their marine habitat priority areas for the WWF and other conservationists. The main danger of climate change, hunger or malnutrition as a result of habitat loss. Polar bears hunt seals from a platform of sea ice. Rising temperatures cause the sea ice melts earlier in the year, driving the bears ashore before they have built sufficient fat reserves for the period of scarce food to survive in the late summer and early autumn. Reduction of sea-ice cover also forces bears to swim longer distances, which further put their energy stores and occasionally leads to drowning. Thinner sea ice tends to be easier to deform, which seems to make it harder for Polar bears to seals to open. 

 

For the indigenous peoples of the Arctic, Polar bears have long played an important cultural and material role. Polar bear remains were found on the yacht dating from 2,500 to 3,000 years ago and 1,500 year old cave paintings of Polar bears are found in the Chukchi Peninsula. He Inuit and Eskimos have many tales with the bears also legends which bears his people in their own homes and bear hides when going outside, and the stories of how the constellation which is said that a large bear, surrounded by dogs seem on was made. These legends reveal a deep respect for the polar bear, who is portrayed as both spiritually powerful and closely related to humans.

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Detail: Polar Bear