POLAR BEARS - Trunity by ert554898

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									MARGARITO
• The polar bear is one
  of eight bear species.
  Its Latin name is
  Ursus maritimus,
  which means” sea
  bear.
• The polar bear is one
  the youngest of the
  eight bear species.
  Scientists believe that
  the polar bear
  evolved about
  200,000 years ago
  from brown bear
  ancestors.
• Polar bears are the
  world’s largest land
  predators. They top
  the food chain in the
  Arctic, where they
  dine primarily on
  seals.
• The polar bear’s main
  prey is the ringed
  seal. The ringed seal
  is the most numerous
  seal in the Arctic.
• Adult male polar
  bears weigh from 775
  to more that 1,500
  pounds. Females are
  considerably smaller,
  normally weighing
  330 to 550 pounds.
• Adult male polar
  bears measure 6 ½
  feet to 10 feet long,
  excluding the tail.
  Females measure 5
  to 8 feet long,
  excluding the tail.
• Polar bears range
  throughout the Arctic in
  areas where they can
  hunt seals at open leads.
  The 5 “polar bear nations”
  where the ice bears are
  found include the U.S.
  (Alaska), Canada,
  Russia, Denmark
  (Greenland), and Norway.
• Polar bears are
  superbly adapted for
  survival in the Far
  North. They are well-
  insulated against the
  cold, and they are
  powerful enough to
  hunt seals
  successfully.
• Polar bears have a
  superb sense of
  smell. They also have
  excellent hearing and
  eyesight. These
  heightened senses
  are necessary for
  survival in the
  changing conditions
  of the Arctic.
• Scientists estimate
  that there are roughly
  20,000 to 25,000
  polar bears
  throughout the Arctic.
• Polar bears are
  champion swimmers.
  They have been
  known to swim more
  than 60 miles without
  rest.
• Polar bears’ forepaws
  are partially webbed
  to assist in swimming.
  The massive size of
  the forepaws
  measures up to 12” in
  diameter.
• The polar bear’s fat
  layer, which is 3 to
  4.5 inches thick, not
  only protects it from
  the cold but adds to
  its buoyancy in the
  water.
• The polar bear’s
  compact ears and
  small tail help prevent
  heat loss. When
  curled up in a ball,
  they often cover their
  muzzles to reduce
  heat loss as well.

								
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