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In  2018–2019,  the  occurrence  of  Cordulegaster  bidentata  Selys,  1843  in  the  Wielickie  Foothills,  located  between the Beskidy mountain ranges (in the south) and the Vistula river valley (in the north) was investigated. It was  examined  whether  C.  bidentata  inhabits  fragmented  landscape,  with  forest  patches  of  various  sizes.  Larvae  of  this  dragonfly were searched in the forest streams, the bottom of which was visually scanned using binoculars. The presence  of 49 larvae was confirmed on 17 stream sections out of 53 (32%). They were recorded in almost the entire geographical  extent of the study area, from the southernmost to the northernmost forest patches. The neighboring occupied streams  were separated by a maximum of 3.7 km, and breeding sites were found in forest patches of an area of 75–1280 ha. It  was confirmed that C. bidentata occurs up to the orographic edge of the Western Carpathians. Its range is continuous  between the northern edge of the Beskidy Mountains and the Vistula valley. New data shift the northern range limit of  C. bidentata in the Western Carpathians by nearly 20 km. The field method used proved to be efficient in assessing the  distribution  of  larvae  in  large  areas,  with  relatively  little  field  effort.  Its  wider  use  would  allow  a  more  complete  recognition of distribution of C. bidentata in the Carpathian Foothills.

fragmenta faunistica

Cordulegaster bidentata Selys, 1843 in fragmented landscape of the Wielickie Foothills: reassesement of the northern limit of species range in the Western Carpathians