The conservation of biodiversity (biological diversity) in nature, is considered to be an important basis for human well-being. Green roofs too are capable of contributing to this; it is mainly low-maintenance roofs, that is to say, quite undisturbed green roofs, that are important refuges for various animal and plant species. Beetles, wild bees and butterflies find food and shelter there. However, the development of biodiversity depends to a great extent on how the habitats that are provided for the flora and fauna on a roof are structured.