Question

why does polar bear hibernate in winters?

Answer 1

Hibernating means to pass the winter in a dormant or lethargic state. Animals that hibernate store body fat when food is plentiful. When food is scarce, they hibernate, living off their stored body fat. ... Polar bears aren't deep hibernators, but enter a state of carnivore lethargy.

Answer 2

Females do but the males do not as they don't necessarily need the protection from the cold. Instead of shivering to produce heat when cold, their bodies convert their energy into exothermic heat which keeps them warm during the winter months when the sun is nonexistent.