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Hibernation is not just a deep sleep; there are different kinds including brumation, torpor, and true hibernation.
Read MoreHow do bears survive the winter? Find out more!
Read MoreBY GAIL MICHENER
Richardson’s ground squirrels are regularly seen above ground during daylight hours for seven to eight months of the year, but rarely from late October through late February, generating the perception that they hibernate for a four-month period encompassing winter. Winter does not last that long, so what accounts for such extraordinarily long hibernation seasons?
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