The Regental alluvial plain on the stretch of river between Cham and Pösing represents a riparian landscape used largely as grassland with distinctive meander necks, including several areas of ponds, oxbows and reedbeds. Species of national importance found there include the European beaver (Castor fiber), black-necked grebe (Podiceps nigricollis), corncrake (Crex crex), black-tailed godwit (Limosa limosa), common snipe (Gallinago gallinago), common redshank (Tringa totanus), curlew (Numenius arquata), bluethroat (Luscina svecica), moor frog (Rana arvalis), European tree frog (Hyla arborea) and the yellow-bellied toad (Bombina variegata).

The first phase of funding made a critical contribution to stabilizing populations of endangered species. Sites were acquired, arable land was converted into typical alluvial plain grassland and water restoration and visitor management measures were carried out. The principal project objective is to create a redispersal centre for the meadowbirds occurring in the project area. In the second phase of funding, measures to achieve these overall objectives and sustain them in the long term will include the purchase of further land in the central meadowbird breeding grounds. In addition, measures are planned for restoring the alluvial plain relief and rewetting the acquired sites.