Free Essay on the Polar Bear
Uploaded by msnarayana on Oct 14, 2012
Polar bears live only in the northern Arctic where they spend most of their time on ice floes. They are the largest land meat-eater in the world and the largest of the bear family. They are well suited to the cold Arctic ice and snow.
Characteristics and Physical Features of the Polar Bear
Identification:
Height: Average adult male 8.5 ft. (2.6 m)
Average adult female 6.5 ft. (2 m)
Weight: Average adult male 900 lbs. Average adult female 500 lbs.
Color: Off-white fur with black nose, eyes and mouth.
Distinguishing Characteristics: The polar bear has many unique adaptations for dealing with the Arctic cold. The polar bear's skin is actually black, which allows it to soak up as much heat as possible from the sun. They are also great swimmers and will swim from ice floe to ice floe. They have been seen swimming 50 miles away from any ice or land.
Breeding: Sexually mature at 4-8 years. Breed polygamously, April through June, with 1-3 cubs every 28 months. Pregnant females dig a den in October through December where cubs are born December to January and stay until March or April. Lactation lasts 28 months. May live 25-30 years.
Can a polar bear be different colors?
Habitat:
Range: They spend their entire life associated with pack ice. Females may prefer ice along the shoreline while others prefer moving sea ice at the floe edge -usually within 180 miles of shore.
Diet: Eats mostly ringed and bearded seals. They will occasionally eat other mammals, eggs, vegetation and beach-cast carrion. Polar bears don't drink water. They get all the liquids that they need from the animals that they eat.
Polar bears have fur that is made up of "hollow guard hairs." Sometimes when polar bears live in zoos that are in a warmer climate, they can have algae growing inside the hollow guard hairs of their fur. This makes them have a greenish tint to their fur. These hollow hairs also keep their hair from matting down when they swim in water.
Do polar bears stay in groups?
Polar bears are usually solitary except for female-cub groups, during mating season, and at abundant food sources.
Do polar bears hibernate?
Pregnant females den up for winter but do not hibernate. All polar bears may den temporarily to avoid bad weather. How do polar bears swim?
They dog-paddle with their head and much of their back above water. Their blubber helps to float them...