Birch Polypore Fungus
This is a picture of Birch Polypore Fungus on a rotting piece of birch log. I found this on a hike near Monterey Ny. Below is a link if your interested in learning more about Birch Polypore Fungus:
Fomitopsis betulina https://g.co/kgs/fxfEtW
Steepshot