Of all the radio collared bears in Maine, all have died from accident, automobiles, hunters, other bears etc. Weights vary between parts of country, time of year and food supply. Typical Maine female weighs about 150 pounds, male about 250. In other parts of country typically get 300-400 pounders. Dens may be a hollow log or simply a thick clump of conifer growth, or under roots of a partially overturned tree.
Bears are solitary and territorial.
Males have large territories covering several female territories. Females do not disperse as far as males, tend to stay in vicinity of mothers territory, so you get matriarchal related female clusters. Bears may travel long distances for seasonal food source, up to 50 miles to get to a favorite beech ridge or other nutritious food. Between 1500 and 2000 usually harvested, most over bait or with dogs. These practices are controversial, and have been outlawed by referendum in some states as unsporting.