The Ursus arctos, commonly known as the brown bear, is a large bear species found across North America, Europe, and Asia. Recognizable by its powerful build, thick fur, and distinctive hump over the shoulders, it is an omnivorous creature with a varied diet that includes fish, berries, and small mammals. Brown bears are solitary but notable for their complex social behaviors during feeding and mating seasons. They play a crucial role in their ecosystem by dispersing seeds and maintaining the balance of their habitats.

Ursus arctos, commonly known as the brown bear, is native to a wide range of regions across the Northern Hemisphere. Its geographical distribution includes North America (primarily in Alaska and western Canada), Europe (spanning from Scandinavia to Eastern Europe), and Asia (including parts of Russia, China, and Japan).

Brown bears inhabit a diverse array of environments, typically preferring areas with dense forest cover, mountainous regions, and tundra ecosystems. They require habitats that provide sufficient food resources and denning sites. The climate in these regions can range from temperate to subarctic, with significant seasonal variations.

As omnivores, brown bears occupy a versatile ecological niche. They are adept at exploiting a wide range of food sources, including fruits, nuts, roots, insects, fish, and small to large mammals. Their role as apex predators and scavengers influences the ecological balance by controlling prey populations and aiding in nutrient distribution. Regional adaptations may include variations in diet and hibernation behaviors, influenced by local environmental conditions and food availability.