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GETTING FOOD
The brown bear, black bear, and giant panda bear are primarily herbavores.
The polar bear, on the other hand, is mostly a meat eater. The giant panda
relys too much on one source of food, the bamboo. This has caused them
great harm and has led them to near extinction. The brown bear and black
bear will eat almost anything. From berries, nuts, and acorns to carrion,
fish, and small mammals, they will eat it. The polar bear's favorite meal
is the seal.
Senses
The hearing and smell of bears are excellent. Smell is used in identification
of others and in searching for food. Their sight is average compared to
other animal species.
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REPRODUCTION AND HIBERNATION
Reproduction
Reproduction among bears takes place in a similar manner to that of canines.
During the three weeks in which the female is in estrus, she will mate with
more than one male. Gestation generally takes about 220 days and for most
the cubs are born while the mother is in hibernation. Then the mother is
ready to come out of the den, so are the cubs.
Hibernation
Not all bears hibernate. Black bears and brown bears do, but the only
polar bear that will hibernate is a pregnate female. Before hibernation
as much food is consumed as possible. When the bear begins to be lathargic,
they will enter an area sheltered from the weather. Hibernation make take place for
4 to 7 months; females hibernate longer than males. During the hibernation
period no waste is passed, but is recycled. Body functions decrease in half,
body temperature drops more than 10 degrees, and the bear's heat beat drops
from 40-70 beats per minute to about 8-12 beats per minute.
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