Their diet consists primarily of seals but may include small walruses or whales. While not all polar bears hibernate, some polar bears do, but it is considered to be more of an elongated torpor than authentic hibernation. Polar bears do not hibernate, except in the case of pregnant females.

Polar bears have no natural predators and are almost entirely carnivorous. Also, scientists can extract polar bear dna from just their footprints in the snow. Most species occupy their dens during the.

Despite their heavy build and awkward gait, they are adept runners, climbers, and swimmers. Even between localized areas, success rates vary greatly. Bears use shelters, such as caves and logs, as their dens;

They may eat vegetation (primarily berries) occasionally during the summer. The polar bear often hunts the walrus by rushing at beached aggregations and consuming the individuals crushed or wounded in the sudden exodus, typically younger or infirm animals. Pregnant mothers make hibernation a priority, as that is their opportunity for a safe and peaceful birth.

With the exception of courting individuals and mothers with their young, bears are typically solitary animals. Their white fur provides camouflage while hunting, but is also translucent,. Bears also give birth to live young, and they lactate or produce milk to feed their young.

They may be diurnal or nocturnal and have an excellent sense of smell. They have extraordinary adaptations for survival in the arctic climate. Polar bear families generally emerge from their dens in march or april when the cubs are strong enough to survive in outside arctic conditions and make the trek to sea ice.

Overall, however, it seems that while polar bears may sometimes travel long distances in hunting seals at their. Polar bears are the only bear species to be considered as marine mammals. In fact, unlike other arctic animals they do.