Nice photo! Did you find this one after it fell out of a roost?
I narrowed this down to one of the three Nyctalus species. The shape of the ears and the pelage are the key characteristics. Without additional photos showcasing the length of the forearms, I am unable to give a definite i.d. However, based on the comparison of the arm to the leaf stem in the picture, and the location of this spotting, leads me to think that this is a lesser noctule (Nyctalus leisleri). But since European bats are not my forte, I welcome any suggestion on this identification
Link to the key I used : http://www.greenbalkans.org/article_files/121437854580.pdf
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