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Snake predation on bats in Europe: new cases and a regional assessment

Abstract Among reptiles only snakes are known to frequently feed on bats and even inside this group chiropterophagy is rare, with most records being noted in the tropics. In the temperate region and especially in Europe, only a handful of cases have been described. Here, we report further cases of bat predation in underground habitats of Bulgaria, highlighting the importance of the Aesculapian snake (Zamenis longissimus) predation on bats in the Western Palearctic. Until now, 11 species of bats have been recorded as preys of snakes in Europe. Our observations are the first records of snake hunting on Mediterranean horseshoe bats (Rhinolophus euryale) and on greater mouse-eared bats (Myotis myotis) in Europe, and only the third to fourth observation of underground predation. The observation in a short time of two incidences of hunting in a fairly small area, coupled with the regular presence of snakes in cave environments, may suggest a more common bat hunting habit for Aesculapian snakes. Bat predation of snakes in the Balkan region (or in the Mediterranean) certainly is more common than previously assumed. The number of records may increase substantially with targeted search during crepuscular and night hours in the entrance area of underground bat shelters.