Another day.....

.....another wood.

This is the well known Birch polypore.

Fomitopsis betulina. Until 2016 it was known as Piptoporus betulinus but professional botanists enjoy reclassifying and changing names.

Its common name, known to many people, is Razorstrop fungus. So called because it was often used by barbers for sharpening cutthroat razors.

It grows almost exclusively on birch trees. Sometimes it can be seen on live trees, but much more often, as here, it flourishes on dead birches laying on the ground. It grows in countries right across the Northern Hemisphere.

It can be home to many insects and mites.