Marker 17These rocks offer a plant habitat comparable to stone walls, but plants have been established here for longer. Most shelter along fissures or shelves, where they can find a few minerals and organic matter, leaving the smooth rock faces to lichens. The dolomite rock has created particular soil conditions here, which are favourable to certain plants such as Kernera saxatilis. Erosion has created small cavities that shelter certain birds, such as the black redstart (phoenicurus ochruros) in summer and the alpine accentor (prunella collaris) in winter.