At the end of the snout is its nose, which is broad and black. Polar bears have 42 teeth, which they use for catching food and for aggressive behavior. They use their incisors to shear off pieces of blubber and flesh. Canine teeth grasp prey and tear tough hides. Jagged premolars and molars tear and chew and they swallow most food in large chunks rather than chewing it up into little pieces like most vertebrates. .
The eyes of a polar bear are dark brown, and set pretty close together, looking forward, they have excellent vision. Polar bears have ears that are small and rounded, which lay flat when they're swimming underwater. They have a small tail about 3 to 5 inches long. Polar bears are completely furred except for the nose and footpads, which are black. Their fur coat is about 2 inches thick. A dense, woolly, insulating layer of under hair is covered by a thin layer of stiff, shiny, clear guard hairs. Their fur is oily and water repellent. The hairs don't mat up when they're wet, which allows them to easily shake free of water and any ice that may form after swimming. Ice forms when the wet fur is exposed to air temperatures at or below freezing. The hairs on a polar bear reflect light, which gives it its white coloration. Oxidation from the sun, or staining, can make the hairs look yellow or brownish in color. These bears completely molt or shed and replace their fur annually, in May or June. This can last several weeks. The polar bears skin is actually black, which helps in the process of keeping them warm because the black skin attracts the suns rays. .
A polar bear's hearing is just about as sensitive as human hearing. Humans can hear sounds with frequencies as low as 0.02 kHz and as high as 20 kHz. The eyesight of these bears also is very similar to that of humans. Unlike humans polar bears have a protective membrane over their eyes that may help shield the eyes from ultraviolet light.
Polar Bear's My report is on Polar Bears. The Polar Bears genus and species name is Ursus maritimus, latin for "sea bear". ... In the South, Polar Bears visit St. ... Polar bears are the largest land carnivore. The male polar bears grow two to three times the size of female polar bears. ...
The global warming could mean extinction for seabirds, walruses, and polar bears. ... The polar bears rely on the ice in order to reach the seals on which they feed. The polar bears eat very little else except ringed seals. ... The change in the ice will affect the food chain of which polar bears are a part. ... (Environment 2) Without the polar bears, the food chain would be broken. ...
Indicator Species Polar bears are one species that are currently feeling the effects of a warming climate. ... Polar bears are starving now and we need to act now to stop climate change," said Kevin Jardine, Greenpeace climate impacts specialist. ... The study reports a decline in weight of both male and female bears as well as a noticeable decline in offspring. ... Polar bears are not the only species currently under stress form a warming climate however. ... Indicator species such as polar bears and butterflies are signaling us that we are treading into uncharted waters. ...
The Act outlined four separate purposes: to conserve fish and wildlife populations and habitats in their natural diversity including, but not limited to, the Porcupine caribou herd, polar bears, grizzly bears, muskoxen, Dall sheep, wolves, wolverines, snow geese, peregrine falcons and other migratory birds and Arctic char and grayling; to fulfill the international fish and wildlife treaty obligations of the United States; to provide the opportunity for continued subsistence uses by local residents; and to ensure water quality and necessary water quantity within the refuge. ... The Refuge is al...
The refuge provides a home to many different, and nearly extinct animals including: musk oxen, caribou, migratory birds, Dall sheep, as well as grizzly, black, and polar bears; and this is just a short list. ... First, oil exploration and extraction activities are concentrated in the refuge's most critical and sensitive areas such as calving grounds for the Porcupine caribou herd and denning areas fro one of America's two polar bear populations. ... It has been reported that one in four Americans drive with seriously under inflated tires. ...
Interest first began with reports of Alaska's surface oil seeps along the arctic coast east of Point Barrow, which in 1923 was established as the 23 million acre Naval Petroleum Reserve Number 4. ... The major debate over this area began after the April 1978 Interior Department's report recommended full-scale oil development on the Coastal Plain of ANWR ("Potential Impacts..."). ... In addition, the coastal waters are home to polar bears throughout their non-dormant months, and even more importantly are the onshore denning areas of the coastal plain used during the winter months. ...
It has been known to turn male into female fish that can bear viable young. ... DDT can be sprayed here in Canada and found in the fat of a polar bear in the arctic due to bioaccumulation. ... Cases have been reported in hunting dogs in the United States and Ontario, Canada. ...
For over 230 year, the poles of the Earth have been visualized by the world as white lands without economic potential, surrounded by massive ice where only native citizens traditionally know as Eskimos, passionate scientists and specific species of animals such as polar bears, narwhals and walruses live in. ... Figure 1.1 from the Japan Aerospace Exploration Agency report (2013) reveals how over the last three decades, the summer Arctic sea ice extent has declined approximately 40 percent. ... A new investigation published in August 2012 in The United Nations Environmental Programme magazin...
East Antarctica moved into its polar position about 80 million years ago, when it was still attached to Australia; the two contents moved apart some 55 million years age. ... Along the polar front, the cold Antarctic surface water's plunge below the warmer sub-Antarctic water, marking the boundaries of Antarctic Ocean. ... Some icebergs as big as 110x75 km have been reported by explorers. ... Climate: The climatic characteristics of the Antarctic continent are determined by its polar position and its isolation . The Amundsen-Scott station of the USA , located at the geograp...