4. Grizzly Bears Don’t Hibernate You may be surprised to learn that grizzly bears don’t hibernate. They enter a mild hibernation called torpor, defined as a physical state of inactivity.

Some scientists prefer to call a black bear’s hibernation a “torpor,” defined as a state of physical inactivity. Others call a bear’s hibernation “denning” as they spend the winter in ...

Oxygen consumption, which is a measure of metabolic rate, (top) and body temperature (bottom) of three black bears during and after hibernation. During hibernation (left side of dashed line ...

and a hibernating bear (in red) in Alaska. The decrease in the bear's body temperature is much less than that of the arctic ground squirrel. The bear's body temperature continuously varies in ...

and the time of year – as bears would normally be hibernating in January. The animal was spotted moving near the Pärnu yacht club early on Sunday morning. A local taxi driver was one of the first to ...