Die Libellenfauna des Tongrubengebiets bei Gozdnica (SW Polen) mit besonderer Berücksichtigung von Leucorrhinia caudalis (Charpentier, 1840)

Waters of anthropogenic origin potentially represent a high value for the dragonfly fauna. For this reason, post mining waters were examined for dragonflies in a clay pit area near Gozdnica (Lubuskie Voivodeship, SW Poland) in 2017. The main goals of this study were the verification of the potential occurrence of Leucorrhinia caudalis (Charpentier, 1840) in this area as well as the contribution of these water bodies to the regional dragonfly diversity. As a result of the investigation were two new records of L. caudalis with reproduction evidence at one water body and the observations of imagines at two sites. Additionally, two further species protected according to national and European law: Leucorrhinia pectoralis (Charpentier, 1825) and Leucorrhinia albifrons (Burmeister, 1839) were found in the area. Furthermore, the entire area is particularly suitable for pioneer colonizers such as Ischnura pumilio (Charpentier, 1825) and Libellula depressa Linnaeus, 1758, as well as for thermophilous species such as Orthetrum coerulescens (Fabricius, 1798) and Crocothemis erythraea (Brullé, 1832). A total of 30 species of dragonflies were detected. For 16 species the proof of reproduction was provided. The examined water bodies are an important habitat for widespread generalists and for rare specialists. Therefore, they significantly contribute to the regional biodiversity.