Search for: [Description = "The echolocation calls of the noctule bat Nyctalus noctula \(Schreber, 1774\) were recorded at night, from June to August 1991, using a QMC S200 bat detector, in 5 habitats \(river, forest\-meadow ecotone, village, coniferous forest, deciduous forest\) of the Białowieża Primeval Forest \(eastern Poland\). Two main kinds of signals were identified\: search calls and feeding buzzes."]