06/04/2026
Cinnamon Black Bear
Scientists have identified a genetic variant known as R153C in a pigmentation gene (TYRP1), that will change the production of melanin, turning a black bear brown. This mutation forces the bears body to produce reddish/yellow pheomelanin instead of pure black eumelanin. A bear's fur can also naturally darken to black as they reach adulthood. Heavier spring and summer molting or sun-bleaching can cause a bear's coat to take on a rusty, cinnamon appearance.