Remarks
Black bears are the most abundant and widely distributed of the three species of North American bears; they have been recorded in all states except Hawaii.
Black bears (Ursus americanus) are the most abundant and widely distributed of the three species of North American bears. An estimated 100,000 black bears inhabit Alaska.
The black bear is the smallest of the North American bears. Adults stand about 29 inches at the shoulders and are about 60 inches from nose to tail. Males are larger than females, and weigh about 180-200 pounds in the spring. They are considerably lighter when they emerge from winter hibernation and may be about 20 percent heavier in the fall when they’re fat.
Black bears can vary in color from jet black to white. Black is the color encountered most frequently across the state, but brown or cinnamon-colored black bears are sometimes seen in Southcentral Alaska and on the southeastern mainland. Cinnamon-colored black bears are also common in Alaska’s Interior. Some bluish-colored bears called glacier bears may be found in the Yakutat area and in other parts of Southeast Alaska. Black bears often have brown muzzles and some also have a patch of white hair on their chest.
Black bears are most easily distinguished from brown bears by their straight facial profile and their claws, which rarely grow more than 1 ½ inches in length. Black bears have adequate sense of sight and hearing, but have an outstanding sense of smell.
For most of the year, black bears are solitary creatures, except from June through July when mating takes place. The cubs are born in their dens following a gestation period of about seven months. The cubs are born blind and nearly hairless, weighing in under a pound. One to four cubs may be born, but two is most common. Cubs remain with their mothers through the first winter following birth. Black bears mature sexually at 3 to 6 years of age, depending upon their environment. In the more southern parts of their range, bears will breed every other year; however, if a litter is lost early during the first summer, the sow will breed again that year. In more marginal environments such as northern Alaska, black bears keep their cubs with them an extra year and will breed every third year.
As with brown bears, black bears spend the winter months in a state of hibernation. Their body temperatures drop, their metabolic rate is reduced, and they sleep for long periods. Bears enter this dormancy period in the fall, after most food items become hard to find. They emerge in the spring when food is again available. Occasionally, in the more southern ranges, bears will emerge from their dens during winter. In the northern part of their range, bears may be dormant for as long as seven to eight months. Females with cubs usually emerge later than lone bears. Dens may be found from sea level to alpine areas. They may be located in rock cavities, hollow trees, self-made excavations, even on the ground.
When it comes to food, black bears are creatures of opportunity. There are certain patterns of food-seeking which they follow. Upon emerging in the spring, freshly sprouted green vegetation is their main food item, but they will eat nearly anything they encounter. Winter-killed animals are readily eaten, and in some areas black bears have been found to be effective predators on new-born moose calves. As summer progresses, feeding shifts to salmon if they are available, but in areas without salmon, bears rely on vegetation throughout the year. Berries, especially blueberries, ants, grubs, and other insects help to round out the black bear’s diet.
In Alaska, black bears occur over most of the forested areas of the state; depending on the season of the year, they may be found from sea level to alpine areas. They are not found on the Seward Peninsula, on the Yukon-Kuskokwim Delta, or north of the Brooks Range. They are also absent from some of the large islands of the Gulf of Alaska, notably Kodiak, Montague, Hinchinbrook and others, and from the Alaska Peninsula south of the Lake Iliamna area. In Southeast Alaska, black bears occupy most islands with the exceptions of Admiralty, Baranof, Chichagof, and Kruzof; these are inhabited by brown bears. Both bear species occur on the southeastern mainland.
There are an estimated 100,000 black bears in the state of Alaska.