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The numerous winter visitors and staging migrants gathering at Lake Constance in winter provide a magnificent and endlessly fascinating wildlife spectacle, which is also reflected in the many and varied sounds we hear from this sound image. Hundreds of Curlews, Whooper Swans and gulls, thousands of ducks, as well as many other bird species, have chosen Lake Constance, with it's extensive shallows and reedbeds as a staging, moulting and overwintering site.

For more than 20 years, at first only in the spring, later in the autumn and winter, Walter Tilgner has been making digital sound-recordings in the typical fen and reedbed habitats of the Lake Constance landscape, mainly in the Rhine Delta of Vorarlberg, Austria, and over recent years in cooperation with the organization Vorarlberger Naturschau - inatura [Vorarlberg Conservation and Natural History Study Centre, Dornbirn, Austria].