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Biodiversity has strongly declined throughout the world mainly due to human activities. Thus, standardized indicators are needed more than ever before to effec?tively monitor anthropogenic disturbance and its impact on ecosystems. In this study, hov?erfly species of two largest phytophagous genera (Cheilosia and Merodon) were chosen as bioindicators to assess the quality of 15 sites located in Serbia; in or around mountains Fruska Gora, Kopaonik, Stara Planina, Dubasnica and Pcinja region. Sufficiently close associations with particular habitats (each having its own characteristic assemblage) make phytophagous hoverflies perfect candidates for such a role. Syrph the Net database was used as a useful tool for assessing quality of habitats and detecting differences between them.

Pollination is a required process for survival of numerous plant species and crops. Hoverflies (Diptera: Syrphidae) play a significant role in this phenomenon. Due to raising environmental pressures, pollinator diversity and pollination services are at risk. Faunistic studies and biodiversity research are the essential elements and steps in the process of species preservation. This study aimed to analyze diversity of hoverflies in two CORINE land cover types (Broad-leaved forest and Natural grasslands), based on a recent one-year study. To achieve this goal, Shannon?s diversity index (H), Shannon?s equitability (EH), and Jaccard similarity coefficient (Jt) were calculated. Values of indices and coefficients indicate which parts of Vojvodina and what land cover types can be considered as hoverfly reservoirs.