Bears
1. Bears are good climbers and swimmers and despite their size can run quite quickly over short distances. Bears can run more than 45 kph.
2. Bears are, on the whole, solitary animals and only really congregate together when food is plentiful, like when catching salmon in streams.
3. Bears have an excellent sense of smell, much better than a dog and possibly the best of any mammal. It is mostly used to find food but is also used to detect the scent of other bears.
4. Bears are carnivores but most (except the Polar Bear) are heading towards being herbivores, eating mainly nuts, berries, fruit and other vegetation. Insects, rodents and fish are also a large part of their diet. Larger animals that bears eat have usually already been killed. Bears don’t like honey but are opportunistic feeders so will go through human garbage.
5. Bears usually hibernate in dens during the winter but occasionally come out if disturbed. Bears are known to not eat, drink or urinate for months during their hibernation. Mothers only waken to give birth, usually in January, to take good care of their cubs.
6. Bears can stand and sit quite comfortably and be in balance just like humans.
7. Bears can communicate vocally similar to dogs, by barking, growling, whining and roaring to accentuate threats, warnings, excitement and alarm. They rarely growl when aggressive and are mostly silent. The best way to warn a bear you are coming is to make a lot of noise so it runs away.
8. Despite their reputation, bears are not actually violent and rarely attack other animals or humans. The main reason they would act aggressively is when they are surprised and when mothers protect their young cubs or there is a territory dispute. Even in these cases aggression is mostly only used as a threat.
9. Bears are intelligent mammals, have a large brain and are known to have a very good memory and are good at navigating in very large territory.
10. There are 8 main living species of bear. The Polar Bear, the Gobi Bear and the Giant Panda are the most endangered, living in the Arctic, Gobi Desert and Western China respectively. The remaining bears are the other Brown bears (which include the large Grizzly and Kodiak bears), Black bears, Sloth bear, Red Panda and Sun bear, which are also threatened species. Koala bears are not bears.
Polar Bears.
1. The Polar Bear is the largest land carnivore on the planet. Although the Kodiak brown bear is sometimes just as big, the Polar Bear on average reaches larger sizes. The largest Polar Bear we know of weighed over 1000 kilograms.
2. Polar Bears are the top of the Arctic food chain and don’t have any natural predators. Its main threat is from the melting icecaps due to global warming and human poaching.
3. The Polar Bear is an excellent swimmer. The blubber that covers the bear is about 10cm thick and helps them float as well as keeping them warm. Its paws are very large, up to 30 cm in diameter, and very strong, enabling them to swim large distances. Distances of more than 100 km are not unusual. It can also dive about 6 meters and hold its breath for 2 minutes. A bear swims faster (10kph) than it walks (9kph).
4. Newly born baby cubs are about 30cm long and weigh less than a kilogram and cannot see. They are totally dependent on their mother’s warmth and protection in the den. When they leave the den they weigh up to 15kg.
5. The Polar Bear has two layers of fur. The upper layer of Polar Bear fur is not actually white but translucent and hollow, it only appears white or yellow due to the reflections from the sun.
6. Polar Bears are extremely well insulated by their blubber and fur so they experience almost no heat loss. So much so, in fact, that if they run too much or exert themselves for too long they can overheat.
7. Polar Bears have an excellent sense of smell. They can smell food up to 2km away and can smell prey even if it is buried under 1 meter of snow.
8. The Polar Bear’s large paws help it distribute its weight on thin ice and help them walk easily over soft snow. The paw pads are covered with tiny bumps that help with grip. The hairs and claws also stop the bear slipping when crossing slippery terrain.
9. Polar bear skin is actually black, the only place this can be seen is on the pads of their feet, the nose and the inside of their ears. The black colour is best for absorbing the heat from the sun.
10. Polar Bears are not territorial and are patient hunters; they have been known to wait many hours until a seal comes up to breath. The polar bear does not drink because it gets all its liquids from what it eats.
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