Subspecies of brown bear
Formerly or currently considered subspecies or populations of brown bears (ursus arctos) have been listed as follows: == List == === Eurasia and North Africa === === North America === == Ecotypes or regional populations == Brown bear size, most often measured in body mass, is highly variable and is correlated to extent of food access. Therefore, bears whose range in areas with access to openings, cover, and moisture or water are on average larger, whereas those bears that range into enclosed forested areas or arid, sparsely vegetated regions, both of which tend to be suboptimal foraging habitat for brown bears, average smaller.