Oak Polypore Buglossoporus quercinus

This fungus occurs on the limbs and trunks of living or dead veteran oak trees (i.e. trees which are 250–800 years old), or on fallen heartwood. Typical habitats include medieval forests, deer parks, wood pasture and wooded commons. Image: Miroslav Klimeš (Flickr)

Find out more: iNaturalist, Fungi of Great Britain and Ireland