mushroom on a birch - fomes fomentarius. birch tinder fungus. oxidoreduction. winter forest. growth on a birch, a tree

autumn background beautiful birch brown chaga closeup curative detail ecology environment false flora food forest fungi fungus green grey healing hoof inonotus landscape macro microscope moss mushroom mushrooms mushroomtinder nature obliquus outdoor oxidoreduction parasite park pattern season snowman spring texture tinder tree wild winter wood