Simpkins Grizzly Bear and Cub Fishing 3 Statue

General description: Formerly, taxonomists listed brown and grizzly bears as separate species. Technically, brown and grizzly bears are classified as the same species, Ursus arctos. Brown bears on Kodiak Island are classified as a distinct subspecies from those on the mainland because they are genetically and physically isolated. The shape of their skulls also differs slightly.

The term “brown bear” is commonly used to refer to the members of this species found in coastal areas where salmon is the primary food source. Brown bears found inland and in northern habitats are often called “grizzlies.” In this paper, brown bear is used to refer to all members of Ursus arctos.

The brown bear resembles its close relative the black bear, Ursus americanus. The brown bear, however, is usually larger, has a more prominent shoulder hump, less prominent ears, and longer, straighter claws. Both the prominent hump and the long claws of the brown bear are adaptations that are related to feeding behavior. The long claws are useful in digging for roots or excavating burrows of small mammals. The musculature and bone structure of the hump are adaptations for digging and for attaining bursts of speed necessary for capture of moose or caribou for food. Color is not a reliable key in differentiating these bears because both species have many color phases. Black bears, for example, occur in many hues of brown, and even shades of blue and white. Brown bear colors range from dark brown through light blond.

Bear weights vary depending on the time of year. Bears weigh the least in the spring or early summer. They gain weight rapidly during late summer and fall and are waddling fat just prior to denning. At this time most mature males weigh between 500 and 900 pounds (180-410 kg) with extremely large individuals weighing as much as 1,400 pounds (640 kg). Females weigh half to three-quarters as much. An extremely large brown bear may have a skull 18 inches long (46 cm) and 12 inches wide (30 cm). Such a bear, when standing on its hind feet, is about 9 feet (2.7 m) tall. Inland bears are usually smaller than coastal bears, probably because they do not have a readily available supply of protein-rich food, such as salmon, in their diet.

Brown bears have been known to live 34 years in the wild, though this is rare. Usually, old males may reach 22 years. Old females may live to 26. Brown bears have an especially good sense of smell and under the right conditions may be able to detect odors more than a mile distant. Their hearing and eyesight are probably equivalent to that of humans. When bears stand upright, it is not to get ready to charge but to test the wind and to see better(adfg.state.ak.us).