First confirmations of the greater noctule bat Nyctalus lasiopterus (Schreber, 1780) presence in Slovenia after more than 85 years

Abstract

During a transect count using ultrasound detectors within the framework of the national bat monitoring scheme, three foraging Nyctalus lasiopterus were observed on 27. 6. 2014, and eventually confirmed by an analysis of their echolocation calls recorded in the forest clearing Šetinov laz near the hamlet of Leskova dolina close to Mt. Snežnik in southern Slovenia. The re-examination of recordings made at the same site during 15 other transect counts in the 2007–2014 period revealed that N. lasiopterus was also present there on 14. 10. 2013. These observations are the first confirmations of this rare species’ occurrence in over 85 years, and opens up questions about the regular presence of N. lasiopterus in Slovenia.27. 6. 2014 sva v okviru državnega monitoringa netopirjev med transektnim popisom netopirjev z ultrazvočnim detektorjem na gozdni jasi Šetinov laz pri zaselku Leskova dolina blizu gore Snežnik v južni Sloveniji opazila tri prehranjujoče se velike mračnike Nyctalus lasiopterus in določitev vrste kasneje potrdila z analizo posnetkov njihovih eholokacijskih klicev. Ko sva pregledala posnetke, narejene med 15 ostalimi popisi na isti lokaciji v letih 2007–2014, sva ugotovila, da je bil veliki mračnik tam zagotovo prisoten tudi med popisom 14. 10. 2013. To so prva opazovanja te redke vrste po več kot 85 letih, ki odpirajo vprašanje, ali so veliki mračniki redno prisotni v Sloveniji.