NATURA SLOVENIAE 18(2): 23-37 Prejeto / Received: 25.10.2016 ZNANSTVENI ČLANEK Sprejeto / Accepted: 17.11.2016 Surveys of butterfly and skipper fauna in the southwestern part of the Republic of Macedonia (Lepidoptera: Papilionoidea & Hesperioidea) Vid ŠVARA1, Miloš POPOVIĆ2,3, Andrej PETERNEL4, Đorđe RADEVSKI3, Kaja VUKOTIĆ5, Rudi VEROVNIK6 1 Jakčeva ulica 1, 2380 Slovenj Gradec, Slovenia; e-mail:
[email protected] 2 University of Niš, Faculty of Sciences and Mathematics, Department of Biology and Ecology, Višegradska 33, 18000 Niš, Serbia; E-mail:
[email protected] 3 HabiProt, Bulevar Oslobođenja 106/34, 11040 Beograd, Serbia 4 Javorje 31, 4223 Poljane, Slovenia; E-mail:
[email protected] 5 Osek 14b, 5261 Šempas, Slovenia; E-mail:
[email protected] 6 University of Ljubljana, Biotechnical Faculty, Department of Biology, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; E-mail:
[email protected] Abstract. Data from four surveys within the last six years were combined in order to improve the knowledge of the butterfly distribution in the Republic of Macedonia. These surveys covered a total of 40 localities, with special emphasis on less sampled areas of the south-western part of the country. The study yielded recording of 131 species, including several habitat specialist and potentially threatened butterflies. Interesting records for the following species are discussed in detail: Muschampia tessellum, Anthocharis gruneri, Euchloe penia, Tarucus balkanicus, Cupido alcetas, Pseudophilotes bavius, Polyommatus aroaniensis, Polyommatus escheri, Araschnia levana and Melitaea ornata. Ten species observed are considered threatened at the European level and 18 of them at the country level. This proves high conservation value of the studied region with many butterfly rich habitats still preserved.