Grizzly Bear

Grizzly Bear


Grizzly Bear Facts


  • First of all, the powerful and majestic Grizzly Bear actually represents a subspecies of brown bear. At one time there were a total of five separate recognized species of Grizzly Bear, and each had their distinct range.
  • There were once two other subspecies in North America alone, yet sadly, the California Grizzly became extinct in 1924. In addition, experts now believe that the Mexican Grizzly Bear has also become extinct.
  • Also, individual bears living closer to the coast tend to be larger than those living inland, due to their richer diet, which often leads people to believe that these bears represent separate species.
  • Finally, these magnificent animals possess one of the longest natural lifespans of any ursine. Males live an average of 22 years in the wild, while the longer-lived females often reach 26 years of age.

Other Threatened Large Mammals

Saola   Javan Rhino   Okapi

               Saola                           Javan Rhino                            Okapi

Grizzly Bear
Source: Photographer: Ronan Donovan


Grizzly Bear Physical Description

One of the most noteworthy facts about the Grizzly Bear remains their tendency to display sexual dimorphism. Males attain an average weight of 790 lb (360 kg), while females rarely exceed 400 lb (180 kg). An average individual has a body length of 6.5 ft (198 cm), and a shoulder height of 3.35 ft (102 cm). Yet exceptional individuals can attain weights of as much as 1,500 lb (680 kg). While coloring ranges from light tan to nearly black, a typical individual displays dark brown fur. The species also remains distinguished by the presence of a pronounced hump on the shoulders. Finally, their powerful claws may be as much as 4 in (10 cm) in length.

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Carnivora

Family: Ursidae

Genus: Ursus

Species: U. arctos

Grizzly Bear


Grizzly Bear Distribution, Habitat, and Ecology


While the brown bear possesses a broad range, the subspecies of Grizzly Bear remains solely restricted to North America. Within that range, they exist from Alaska to Mexico, and as far east as Hudson Bay, as well as Canada. Yet their numbers continue to decline, due to hunting and habitat loss, despite protection. While technically omnivorous, they primarily have a carnivorous diet. They consume large quantities of small game, fish, and various plants, depending upon their individual habitat. Habitats vary, depending upon territory, yet typically consists of plains or forests. They also spend an average of 5-7 months each year in hibernation, with young actually being born during this period. They typically live solitary lives, except while raising young.

Species Sharing Its Range

Reindeer   North American Beaver   Bald Eagle

            Reindeer                North American Beaver             Bald Eagle


Todd Sain Sr.