Polar Bear medium sized character jug produced by Quail Ceramics of the Midlands, England, circa 2020. The polar bear is a hypercarnivorous bear whose native range lies largely within the Arctic Circle, encompassing the Arctic Ocean, its surrounding seas and surrounding land masses, this includes the most northern regions of North America and Eurasia. It is the largest extant bear species, as well as the largest extant land carnivore. An adult male weighs around 770�1,540 lb, while an adult female is about half that size. Although it is the sister species of the brown bear, it has evolved to occupy a narrower ecological niche, with many body characteristics adapted for cold temperatures for moving across snow, ice and open water, and for hunting seals, which make up most of its diet. Although most polar bears are born on land, they spend most of their time on the sea ice.