 In southern Australia they hibernate over the austral winter, in colder periods from April–May until September; The bat use fat reserves to extend a period of torpor for up to eleven days.Gould's long-eared bats eat flying and terrestrial insect species.As with the related species, the lesser "N. geoffroyi", they appear later in the evening and closely peruse the foliage or ground to detect, or listen for, insect prey.