Why Werraaue bei Berka und Untersuhl stands out
The reserve is best known as one of the most important meadow-breeding bird areas in Thuringia, with extensive wet grassland, oxbow systems, and reed-fringed old gravel pits providing habitat for threatened ground-nesting species. It is also notable for unusual inland saline vegetation communities, a legacy of salt discharges from the historic potash mining industry further up the Werra catchment. Its position along the former inner-German border gives it added significance within the Green Belt biotope network, where the Werraaue functions as a key stepping stone connecting floodplain habitats across Thuringia and Hesse.
Werraaue bei Berka und Untersuhl history and protected-area timeline
Until the sixteenth century, the Werra valley around Berka and Untersuhl was covered by extensive floodplain forests. As the population grew and the cultural landscape expanded, these forests were cleared, the floodplain was drained, and the land converted to permanent grassland for hay and pasture.
Between 1850 and 1860 the Werra near Untersuhl was straightened, shortening the river by roughly 1.2 kilometres. The resulting incision of the riverbed reshaped the banks and lowered the groundwater table across the floodplain. From the late nineteenth century until about 1930, the gravel deposits underlying the floodplain were commercially extracted, leaving behind several pit lakes, including the "Baggerloch" still visible today.
After a period of intensive arable use, renaturation of the wet habitats began in 1994. Three early reserves, "Werraaue bei Untersuhl", "Werraaue südwestlich Berka", and "Werraaue östlich Dankmarshausen", were provisionally secured between 1990 and 1995. They were merged and permanently protected on 30 April 1996 by ordinance of the Thuringian State Administration Office in Weimar, creating the 255.8 hectare Naturschutzgebiet "Werraaue bei Berka und Untersuhl".
Since 2020, additional renaturation work has focused on tributaries entering the Werra from the left. Compensatory measures tied to the construction of the Leibis-Lichte drinking water reservoir are being used to restore near-natural meanders and an "Entwicklungskorridor", a dynamic corridor in which streams can re-shape their own beds through lateral erosion, bank collapse, and natural deposition.
Werraaue bei Berka und Untersuhl landscape and geographic character
The Werraaue lies in the Berka basin, a natural region within the Salzunger Werrabergland of the East Hessian Bergland, bordered to the east by the Oberellener and Frauenseer Hügelland. Elevations within the reserve range from about 206 to 231 metres above sea level, producing a strikingly flat, low-relief floodplain.
The topography is shaped by a slow, meandering Werra, by several old oxbow arms that have partially silted into wet slack water and partially been restored, and by flood-relief channels and drainage ditches that trace former river pathways. The most important drainage features today are the Rhedengraben in the north and the Erlichsgraben in the south. Steep banks along stretches of the Werra, often enriched by historical saline discharges from the upstream potash industry, are colonised by nitrophilous tall-herb vegetation.
Alongside open grasslands and reed-edged waterbodies, the reserve preserves small remnants of floodplain woodland and lines of pollarded willows near Untersuhl, which contribute to the structural diversity of the floodplain landscape.
Werraaue bei Berka und Untersuhl ecosystems, habitats, and plant life
Ecologically, the Werraaue combines several distinct floodplain habitat types within a compact area. The most conspicuous habitats are species-poor but flower-rich wet grasslands dominated by ryegrass, fringed by reed beds along the old gravel pits and by flood-meadow communities in the silted oxbow remnants. Steep Werra banks and disturbed areas support tall-herb stands, while the unusual salinity of floodplain sections, inherited from decades of upstream potash industry effluents, has created small inland salt-influenced patches.
These saline patches host distinctive plant communities, including striking occurrences of European glasswort and sea aster, alongside brackish-tolerant species characteristic of inland salt sites. Pollarded willows, residual floodplain forest fragments, and scattered old avenues of trees add structural variety and refuge for many insects, amphibians, and bats.
The mosaic of open grassland, reed, standing water, slow-flowing channels, and woody elements supports an unusually diverse floodplain fauna for central Germany, with both typical wet-grassland species and more specialised wetland and forest-edge species depending on these habitats in close combination.
Werraaue bei Berka und Untersuhl wildlife and species highlights
The reserve is particularly significant for meadow-breeding birds of open farmland, a group that has been heavily affected by agricultural intensification and landscape fragmentation. Breeding species include whinchat, yellow wagtail, water rail, and meadow pipit, with suspected or probable breeding by penduline tit, red-backed shrike, and marsh harrier. White stork regularly uses the floodplain as a feeding area, and kingfisher, red kite, black kite, black stork, and little grebe have all been observed.
The Werraaue is regarded as one of the most valuable meadow bird areas in Thuringia, but many of the species it supports are in decline. Curlew has effectively vanished as a breeder in Thuringia, lapwing and snipe are decreasing sharply, and significant negative trends are documented for tawny pipit, whinchat, grey partridge, great grey shrike, wheatear, and meadow pipit.
Beyond the birds, the wider Werra floodplain is designated under the EU Habitats Directive for populations of bullhead and brook lamprey, plus otter, in the main river; for yellow-bellied toad and northern crested newt in suitable wet habitats; and for a series of bat species, including lesser horseshoe, Bechstein's, Barbastelle, and pond bats, with Bechstein's and Barbastelle recognised as species of national conservation responsibility for Germany.
Werraaue bei Berka und Untersuhl conservation status and protection priorities
Werraaue bei Berka und Untersuhl sits at the intersection of multiple overlapping conservation regimes. As a German Naturschutzgebiet it carries the strict protections attached to that designation, including defined protective purposes around preserving near-natural floodplain habitats, securing breeding, feeding, and roosting areas for meadow birds and reed specialists, and maintaining the characteristic open floodplain meadows through extensive grassland use.
At the European level, the site belongs to the Natura 2000 network through both a Flora-Fauna-Habitat area and a Bird Protection Area. The Habitat Directive site seeks to conserve the natural course of the Werra with its notable populations of bullhead and brook lamprey, preserve old arms and standing waters as breeding habitat for amphibians such as yellow-bellied toad and northern crested newt, maintain inland salt-site habitats that support the dark meadow-clover butterfly, and secure critical bat populations.
The Bird Protection Area identifies nearly eighty bird species of conservation interest, several of which are now regionally extinct or critically threatened, including osprey, little crake, common sandpiper, curlew, and black-tailed godwit as extinct; bittern, spotted crake, white stork, little bittern, lapwing, common teal, black-headed gull, great grey shrike, and rook as critically endangered; and corncrake, whinchat, garganey, and wryneck as strongly endangered. Through all these layers the Werraaue also forms a key node in the Green Belt biotope network, declared a National Natural Monument by the Thuringian parliament in 2018 to link fragmented habitats and secure genetic resources across the former inner-German border.
Werraaue bei Berka und Untersuhl cultural meaning and human context
The Werraaue occupies a culturally distinctive position along the former inner-German border, an area that remained largely unbuilt and undeveloped for decades. This borderland status allowed traditional floodplain meadows and old river features to be preserved, while the landscape today also bears visible traces of nineteenth- and twentieth-century gravel extraction and river straightening.
The reserve sits between the Thuringian villages of Berka and Untersuhl and is closely associated with long-established extensive grassland use, including grazing by hardy cattle breeds, that has shaped both the open floodplain character and the rural identity of the Werra valley community. Local trails, information panels, and canoe-friendly sections of the Werra reflect a deliberate effort to make visitors aware of these landscape values without compromising habitat protection.
Top sights and standout views in Werraaue bei Berka und Untersuhl
The Werraaue's most distinctive quality is the tight coupling of river meanders, oxbow lakes, reed beds, saline-influenced patches, and extensive wet grassland within a single compact reserve. This combination, unusual for central Germany, supports both specialist meadow-breeding birds and a wider floodplain fauna.
A second defining feature is the reserve's role as a connecting node within two larger conservation networks: the Natura 2000 system, through which it links habitat protection for fish, amphibians, and bats across the Werra valley, and the Green Belt biotope network along the former inner-German border, where it functions as a refuge and stepping stone for species that depend on large, unbroken floodplain complexes.
Best time to visit Werraaue bei Berka und Untersuhl
Spring and early summer are the most rewarding periods to visit the Werraaue, when wet meadows are at their richest and breeding birds such as whinchat, yellow wagtail, and meadow pipit are most active. Late spring offers the densest combination of flowering grassland and singing birds, while early morning visits typically provide the best chance to observe more secretive species along the reed-edged oxbows.
Late summer brings dramatic insect activity and expanding reed stands, while autumn can suit visitors interested in migratory waterbirds using the floodplain as a staging area. Mowing and grazing schedules are deliberately late in protected sections to protect ground-nesting birds, meaning the open character of the meadows is most fully visible between late spring and mid-summer before management cuts begin.
