Stwierdzenie późnego występowania mopka zachodniego Barbastella barbastellus (Chiroptera: Vespertilionidae) w skrzynkach szczelinowych dla nietoperzy

The Western Barbastelle, Barbastella barbastellus (Chiroptera: Vespertilionidae, Schreber, 1774), was observed to inhabit „crevice” bat boxes very late in the year. In November 2016, on two out of the three study areas, a small number of Western Barbastelle specimens, five individuals and one individual, respectively, were observed to inhabit bat boxes at night temperatures below zero and snow cover. The occurrence of this species in summer-type hiding places during winter weather conditions has not been reported previously for Poland.