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Extirpated. Synonyms. Euarctos americanus. The American black bear ( Ursus americanus ), also known as the black bear, is a species of medium-sized bear endemic to North America. It is the continent's smallest and most widely distributed bear species. It is an omnivore, with a diet varying greatly depending on season and location.
Hibernation. Hibernation is a state of minimal activity and metabolic depression undergone by some animal species. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate. It is most commonly used to pass through winter months – the so-called overwintering .
The male grizzly bear's hibernation ends in early to mid-March, while females emerge in April or early May. [52] In preparation for winter, bears can gain approximately 180 kg (400 lb), during a period of hyperphagia, before going into hibernation. [53] The bear often waits for a substantial snowstorm before it enters its den: such behavior ...
Bears Don't Actually Hibernate! Billy was rescued by the zoo years ago after his left front leg was caught in an illegal trap when he was a young wild bear. The trap worked, and he is now missing ...
Bears of northern regions, including the American black bear and the grizzly bear, hibernate in the winter. [109] [110] During hibernation, the bear's metabolism slows down, its body temperature decreases slightly, and its heart rate slows from a normal value of 55 to just 9 beats per minute. [111]
When bears hibernate, their body temperature drops from 100 degrees Fahrenheit to 88 degrees Fahrenheit, and their heart rate goes from 50 beats a minute to 10, according to the Massachusetts ...
The brown bear ( Ursus arctos) is a large bear native to Eurasia and North America. It is one of the largest land carnivorans, rivaled in size only by its closest relative, the polar bear, which is much less variable in size and slightly bigger on average. The brown bear is a sexually dimorphic species, as adult males are larger and more ...
Asian black bears are diurnal, though they become nocturnal near human habitations. They will walk in a procession of largest to smallest. They are good climbers of rocks and trees, and will climb to feed, rest, sun, elude enemies and hibernate. Some older bears may become too heavy to climb. [ 30]