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How long do black bears hibernate?

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Hibernation is part of a bear's annual cycle of activity, when its metabolic systems change and activity pauses for a period of time varying with the habitat's climate. Grizzly bears hibernate for 5–7 months each year. read more

It is a common misconception that bears hibernate during the winter. While bears tend to slow down during the winter, they are not true hibernators. Black bears, Grizzly bears and Brown bears do go into a deep sleep during the winter months, known as torpor. read more

They redefined mammalian hibernation as a specialized, seasonal reduction in metabolism concurrent with scarce food and cold weather (Watts et al. 1981). Black bears are now considered highly efficient hibernators. Hibernators the size of chipmunks hibernate differently. read more

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