Picture taken on the 6th April 2007 at Targasonne, Alta Cerdanya, Oriental Pyrenees, France, Catalonia, on the top of an isolate granite boulder, almost flat surface, place with bird droppings, 1.650 m. altitude, with Ramalina polymorpha and Ramalina capitata, Rhizoplaca melanophthalma, Cornicularia normoerica, Candelariella vitellina, etc. all coprophilous lichens.
This lichen community is not disturbed by the manured substratum and can live in ammonia ion and uric acid rich habitats. Such lichens are called ornithocoprophilous and they are very common at the "Chaos of Targasonne".
Brodoa atrofusca is frequent in upland areas of Europe and Catalonia (Montseny and Pyrenees).
Ramalina polymorpha differs from Ramalina capitata in its flat lacinia with soralia in all surface.