Polar Bear Hybernation
Name: Cheryl L. D.
Do polar bears hibernate during the winter months?
Peter Faletra Ph.D.
Office of Science
Department of Energy
There is a definition to understand concerning hybernation.
A google search turned this extensive site up first
And this detailed information from
"3. Only pregnant female polar bears hibernate.
a. Polar bears are not deep hibernators, but enter a state of carnivore
lethargy. Though hibernating females sleep soundly, they are easily and
b. The female polar bear's heart rate slows to about 27 beats per minute
from a normal resting heart rate of about 46 beats per minute (Stirling,
c. When hibernating, a female's body temperature may drop slightly, perhaps
to 35C (95F), or it may remain normal at 37C (98.6F). Unlike most other
hibernators, female polar bears give birth while hibernating. High body
temperature is needed to meet the demands of pregnancy, birth, and nursing
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Update: June 2012