Brown bear
Large omnivorous bear native to Eurasia and North America.
The brown bear (Ursus arctos) is a large bear native to Eurasia and North America. Among land carnivorans, it is rivaled in size only by its closest relative, the polar bear, which is slightly larger on average and much less variable in size. Brown bears exhibit sexual dimorphism, with adult males being larger and more compactly built than females. Their fur can range in color from cream to reddish to dark brown. Unique among bears, they have evolved large hump muscles and paws up to a considerable width and length, adaptations that allow them to dig effectively through dirt. Their teeth resemble those of other bears and reflect their dietary flexibility. Throughout their range, brown bears primarily inhabit forested areas at elevations up to a certain limit. They are omnivorous, deriving about 90% of their diet from plants, contrary to popular belief. When hunting, they take prey ranging from insects and rodents to large animals like moose or muskoxen. In coastal Alaska, they often feed on spawning salmon. For most of the year, they are solitary, associating only for mating or raising cubs. Females typically give birth to one to three cubs, which stay with their mother for 1.5 to 4.5 years. They are long-lived, with an average wild lifespan of 25 years. Attacks on humans, though widely reported, are generally rare. While the brown bear’s range has shrunk and it has faced local extinctions, it remains listed as least concern by the IUCN, with an estimated population of 110,000 in 2017. Extinct populations include the Atlas bear of North Africa and several North American grizzly populations. Many southern Eurasian populations are highly endangered; the Himalayan brown bear is critically endangered, occupying only 2% of its former range and threatened by poaching. The Marsican brown bear of central Italy has a population of only about 50 bears. The brown bear is considered a charismatic megafauna species, kept in zoos since ancient times and tamed for circuses. It has long featured in human culture, literature, art, folklore, and mythology.
- Scientific name
- Ursus arctos
- Average lifespan in the wild
- 25 years
- Dietary plant proportion
- 90%
- Number of cubs per birth
- 1 to 3
- Cub dependency period
- 1.5 to 4.5 years
Lore & Background
The brown bear is a large, sexually dimorphic species; adult males are larger and more compactly built than females. Its fur varies from cream to reddish to dark brown. A defining physical trait is a large hump of muscle over the shoulders, unique among bears, which, along with its wide, long paws, allows it to dig effectively. Its teeth resemble those of other bears and reflect its adaptable diet. The brown bear is native to Eurasia and North America, and among land carnivorans, it is rivaled in size only by its close relative, the polar bear, which is slightly larger on average and less variable in size. Throughout its range, it primarily inhabits forested areas at elevations up to a certain limit. It is omnivorous, deriving about 90% of its diet from plants, though it hunts prey from insects and rodents up to large animals like moose or muskoxen. In coastal Alaska, it feeds heavily on spawning salmon. For most of the year, it is solitary, associating only for mating or raising cubs. Females typically give birth to one to three cubs, which stay with their mother for 1.5 to 4.5 years. The species has an average lifespan of 25 years in the wild. While attacks on humans are widely reported, they are generally rare.
Reader's Guide
The brown bear is considered one of the most popular of the world's charismatic megafauna. It has been kept in zoos since ancient times and has been tamed and trained to perform in circuses. For thousands of years, it has had a role in human culture, often featured in literature, art, folklore, and mythology. Its range has shrunk, and it has faced local extinctions, including the Atlas bear of North Africa and the Californian, Ungavan, and Mexican populations of the grizzly bear. Many populations in southern Eurasia are highly endangered; the Himalayan brown bear is critically endangered, occupying only 2% of its former range. The Marsican brown bear of central Italy is believed to have a population of only about 50 bears. Hybrids with polar bears have occurred both in captivity and in the wild, confirmed by DNA testing in 2006.
Did You Know?
- The brown bear derives 90% of its diet from plants.
- It has evolved large hump muscles, unique among bears, and paws up to 21 cm wide and 36 cm long.
- A grizzly–polar bear hybrid was confirmed in the wild in 2006 by DNA testing.
Frequently Asked Questions
Who is Brown bear?
The brown bear (Ursus arctos) is a large omnivorous mammal found across forested regions of Eurasia and North America. Among all land carnivores, it is second only to the polar bear in overall size.
Why is Brown bear important?
As a dominant omnivore in forest ecosystems, the brown bear influences vegetation, prey dynamics, and nutrient flow across its vast range. It has also occupied a central place in human folklore, art, and mythology for thousands of years.
How many cubs does Brown bear have?
A female brown bear usually produces a litter of one to three cubs per birth. The species is also sexually dimorphic, so males and females differ noticeably in body size and build.
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