 There is some variation in the morphology of this species across its range, with some taxonomists suggesting there may be cryptic species that have not yet been identified within the species.The echolocation call of the little forest bat is regionally variable, in New South Wales the characteristic frequency of search phase calls is between 42.5 and 53 kilohertz depending on the region where it is found.This is more than double the maximum frequency of the human hearing range and cannot be heard without the assistance of a bat detector.