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The Natura 2000 site "Dealurile Clujului Est" is a vast area (approx. 18.000 ha), with valuable steppe-like and forest habitats still very well preserved. The importance of this site comes from the syntopic presence of 4 Maculinea taxons, an extremely rare situation in Europe, and from the fact that the mesophilic medows from this area have the highest plant diversity in the world. In this study we emphasize the effect of mowing and grazing on the butterfly diversity from the site. We used the transect method, walking 6 transects in mowed areas and 6 transects in grazed areas. We used similarity measures and unpaired t-test compare the two different land use types, regarding species number, number of individuals, species diversity and evenness. [ABSTRACT FROM AUTHOR]