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The polar bear (Ursus maritimus) is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed.The polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300–800 kg (660–1,760 lb).
Hibernation may last days, weeks, or months—depending on the species, ambient temperature, time of year, and the individual's body-condition. Before entering hibernation, animals need to store enough energy to last through the duration of their dormant period, possibly as long as an entire winter.
Grizzly bears also do not defecate or urinate throughout the entire hibernation period. The male grizzly bear's hibernation ends in early to mid-March, while females emerge in April or early May. [53] In preparation for winter, bears can gain approximately 180 kg (400 lb), during a period of hyperphagia, before going into hibernation. [54]
Winter is finally here, and bears are getting ready to find a den to hibernate in over the next few months. In Wyoming's Yellowstone National Park, one bear was caught prepping for his long sleep ...
If the winter is mild enough, they may wake up and forage for food. Females also give birth in February and nurture their cubs until the snow melts. [90] During winter, American black bears consume 25–40% of their body weight. [91] The footpads peel off while they sleep, making room for new tissue.
The winners of the 2024 European Wildlife Photographer of the Year awards have been announced. Launched in 2001, this competition is one of the most prestigious in modern nature photography.
Bears are prolific scavengers and kleptoparasites, stealing food caches from rodents, and carcasses from other predators. [55] [86] For hibernating species, weight gain is important as it provides nourishment during winter dormancy. A brown bear can eat 41 kg (90 lb) of food and gain 2–3 kg (4.4–6.6 lb) of fat a day prior to entering its ...
Folks are wondering whether this Arctic blast means that the rest of the winter will include this level of cold. "That is the $64,000 question!" Cohen told USA TODAY.