Polor Bears
As most people know the polor bears home is melting from Globle Warming.
Size
Polar bears are the largest land carnivore. Male polar bears (boars) grow two to three times the size of female polar bears (sows). Boars weigh about 350 to more than 650 kg and are about 2.5 to 3m long. The hind limbs are longer than the forelimbs. This makes the large, muscular hind end stand higher than the shoulders. A polar bear's head is oblong and relatively small compared to body size. Polar bears have 42 teeth, which they use for catching food and for aggressive behavior.
Behavior
Like humans, polar bears walk on the soles of their feet with their heels touching the ground first. Like other bears, they can also stand on their hind feet and walk upright for short distances. Polar bears are most active the first third of the day and least active the final third of the day. Polar bears are basically solitary. Usually, only two social units exist: (1) adult females with cubs and (2) breeding pairs.Aggression occurs between males during the breeding season and when males attempt to steal food caught by other polar bears. Young polar bear cubs chase and tackle their siblings.
Swimming
Polar bears are strong swimmers; they swim across bays or wide leads without hesitation. They can swim for several hours at a time over long distances. They've been tracked swimming continuously for 100 km . A polar bear's front paws propel them through the water dog-paddle style. The hind feet and legs are held flat and are used as rudders. Polar bears can obtain a swimming speed of 10 kph . A polar bear's nostrils close when under water.
Hibernation
Hibernating means to pass the winter in a dormant or lethargic state. Animals that hibernate store body fat when food is plentiful. When food is scarce, they hibernate, living off their stored body fat.
Polar bears don't enter deep hibernation. Deep hibernation applies to an animal whose body temperature drops to 5C (41F) for a period of days or weeks. Deep hibernators also show a marked drop in heart rate, and are slow to wake up when disturbed. Only pregnant female polar bears hibernate. a. Polar bears aren't deep hibernators, but enter a state of carnivore lethargy. Though hibernating females sleep soundly, they're easily and quickly aroused.
Diet and Eating Habits
Polar bears feed mainly on ringed or bearded seals. When seals are unavailable, polar bears eat other marine mammals, reindeer, small rodents, sea birds, ducks, fish, eggs, vegetation (including kelp), berries, and human garbage.
Once a seal is captured, a polar bear bites it several times on the head and neck before dragging it several meters from the water to feed. The skin and fat are eaten first, followed by the meat.
Polar bears often stop to wash during feeding, using water nearby or rubbing in the snow.Stalking is a hunting method used in summer when seals haul out on sea ice.Still hunting is the most common method of hunting year-round.The polar bear remains motionless beside a breathing hole or lead edge waiting for a seal to surface. When a seal surfaces, the polar bear bites onto the head or upper body, then flips the entire seal onto the ice.
A polar bear's stomach can hold an estimated 15% to 20% of its body weight. It can assimilate 84% of the protein and 97% of the fat it eats. Polar bears need an average of 2 kg of fat per day to survive.
Reproduction
Female polar bears reach sexual maturity at about 4 years.Male polar bears reach sexual maturity at about 6 years.Most male polar bears don't successfully mate until 8 to 10 years and older.
Breeding takes place in April and May on the sea ice. During the breeding season, males and females find each other by congregating in the best seal-hunting habitats. Male polar bears have been seen following the tracks of breeding female polar bears for more than 100 km
Communacation
Adult polar bears vocalize most when they're agitated or threatened. Sounds include hissing, growling, champing of teeth, and soft chuffing. 2.Cubs vocalize more often and for diverse reasons. Sounds include hissing, squalling, whimpering, lip smacking, and throaty rumblings.
Mothers warn cubs with a chuffing or braying sound. Polar bears also communicate through sight, touch, and smell.
