sentences:  "Arion distinctus" occurs in a variety of moist habitats, including gardens, waste ground and woodland, but may be absent in harsh upland habitats.In Switzerland it occurs up to 2000 m. It is typically found amongst ground litter or sheltering under wood, stones and soil clods.Studies in agriculture and horticulture have often not distinguished "A. distinctus" and "A. hortensis", but both species are considered to be economically significant pests.