Lichen
It’s said that the abundance of lichen is an indicator of air quality. I hope then the variety of species on this one branch in Gulberwick is a good sign.
Paul Harvey has a fine introductory article about lichen in Shetland on the Shetland Amenity Trust website.
[Gulberwick during Lockdown collection - Image 3 of 80]
Posted:
Image #1061