Forum Flora Germanica

Lands there for me, but marked part had obvious pink tinge, whereas outside marked part no pink. Any opinion ?
details: http://agrozoo.net/jsp/Galery_one_image ... 4ab50f56d0

I see some "glistening", maybe snail-slime. Snails eat lichen.

Grazing by snails causes paler thalli as the pigment itself is eaten or reduced. Thalli
with strong fungal infections, grazed or otherwise abnormally affected should not be
evaluated at all.

https://theses.cz/id/510xm3/45114110

The sharpest eye I have seen ever (-:

Checked original and there are indeed some traces. There were snails (likely these: http://agrozoo.net/jsp/Galery_one_image ... 211fd085d5) around on wall, I was wondering what they do as there was nothing but lichens.

Thanks.