Brown bears are some of the largest carnivores on Earth. They hunt alone except during seasonal spectacles such as salmon spawning which causes large numbers of bears to gather together. As well as fish, these fearsome predators can bring down moose, elk and even black bears. Brown bears spend nearly half their lives underground in a state of hibernation. Females even give birth and nurse a litter underground during the winter months, although they will lose a staggering 40% of their body weight in the process.
Scientific name: Ursus arctos
Rank: Species
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The salmon return
Salmon return to spawning grounds and the forest's bears take advantage of their abundance
The salmon return to river spawning grounds and the forest’s bears take full advantage of their abundance.
The grizzly bear and the salmon
Grizzly bears gorge themselves on salmon during the annual run.
Chris Packham watches the annual spectacle of grizzly bears gorging themselves on salmon. The fish return to the rivers of their birth in order to spawn. But by hunting them, the bears spread the salmon nutrients deep into the forest.
August feast
Migrating salmon must always run the gauntlet of the waiting bears.
Migrating salmon must always run the gauntlet of the waiting bears.
Caddis fly picnic
The first feast of spring for brown bears.
The first feast of spring for brown bears.
The following habitats are found across the Brown bear distribution range. Find out more about these environments, what it takes to live there and what else inhabits them.
Discover what these behaviours are and how different plants and animals use them.
Additional data source: Animal Diversity Web
Least Concern
Population trend: Stable
Year assessed: 2008
Classified by: IUCN 3.1
The brown bear (Ursus arctos) is a large bear distributed across much of northern Eurasia and North America. Adult bears generally weigh between 100 and 635 kg (220 and 1,400 lb) and its largest subspecies, the Kodiak bear, rivals the polar bear as the largest member of the bear family and as the largest land-based predator. There are several recognized subspecies within the brown bear species. In North America, two types are generally recognized, the coastal brown bear and the inland grizzly bear, and the two types could broadly define all brown bear subspecies. An adult grizzly living inland in Yukon may weigh as little as 80 kg (180 lb), while an adult brown bear in nearby coastal Alaska living on a steady, nutritious diet of spawning salmon may weigh as much as 680 kg (1,500 lb). The exact number of overall brown subspecies remains in debate.
While the brown bear's range has shrunk and it has faced local extinctions, it remains listed as a least concern species by the IUCN with a total population of approximately 200,000. As of 2012, this and the American black bear are the only bear species not classified as threatened by the IUCN. However, the Californian, North African (Atlas bear), and Mexican subspecies were hunted to extinction in the nineteenth and twentieth centuries and the Marsican brown bear in central Italy is believed to have a population of just 30 to 40 bears.
The brown bear's principal range includes parts of Russia, the United States (mostly Alaska), Canada, the Carpathian region (especially Romania), The brown bear is recognized as a national and state animal in several European countries. It is the most widely distributed of all bears.
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