Xanthoria parietina, the golden shield
I often struggle with identifying fungi, so when it comes to lichens, I normally don’t bother beyond the basic fruiticose/foliose/crustose distinction. However, when I found this striking specimen recently I thought I’d try looking it up. In this case, it’s an easy one, the relatively unmistakable Xanthoria parietina, the gold shield lichen.
Nikon D5200 Tamron 70-300mm f32 95mm +68mm 1/20 ISO 3200