From 2018 to 2021, we conducted a research of dragonflies in the Dolnovážska niva floodplain areas. We categorized the sites into four habitat types – gravel pits, lowland river, lowland canal, and oxbow lakes (paleopotamal). The main focus of the dragonfly research was on the gravel pits near the villages of Koplotovce and Horné Zelenice. Flowing waters were represented by the old channel of the Váh River and the Horný Dudváh, and dragonfly material was also recorded in the oxbow lakes in the inundation area of the Váh River. From 302 records, we obtained 2,515 specimens from 30 locations and identified 40 species of dragonflies. The most abundant species were Ischnura elegans and Platycnemis pennipes, while dominant species included Calopteryx splendens and Sympetrum striolatum. We confirmed the occurrence of 12 protected species of national importance in the area, Anax parthenope, Epitheca bimaculata, Gomphus flavipes (a species of European importance), Lestes virens, Libellula fulva, Onychogomphus forcipatus, Orthetrum brunneum, O. coerulescens, Sympecma fusca, Sympetrum meridionale and Sympetrum pedemontanum respectively. A significant finding was the confirmation of a large population of Chalcolestes parvidens (the first confirmed occurrences in Slovakia). The most notable result was the first recorded occurrence of Erythromma lindenii in Slovakia.”