The sp. is threatened of extinction in Switzerland with the only actual breeding localities in the Valais and at Lake Constance (Untersee). We report on a new locality near St. Margrethen where S. paedisca was recorded regularly since 1994 in summer and autumn. Records derive from the northern slope of the "Heldsberg" at 420 - 440 m a.s.l., which is mainly covered with deciduous and coniferous forest. It is yet unclarified whether the species is autochthonous at the locality or whether the animals originated from the large populaiton in the Rhine delta (Vorarlberg, Austria), approximately 5 km away.