Why do black bears have different fur colors? Scientists suggest that it is a natural genetic phenomenon that allows bears to adapt and survive best in their climates and habitats. For example, in dense deciduous forests in the Appalachians, bears are primarily black -" appropriate camouflage for dense thickets and underbrush. In dry western regions, black bears are predominantly brown or cinnamon in color, reflective of the rocky, more sparsely vegetated landscape. The American Bear Association notes that only 1% of black bears in Pennsylvania are brown, while 90% of black bears in Yosemite National Park are tan, light brown, or cinnamon.