is . ▁The ▁related ▁b ats ▁of ▁genus ▁V es pad el us , ▁the ▁eastern ▁forest ▁bat ▁V . ▁p um ilus ▁and ▁large ▁forest ▁species ▁V . ▁dar ling ton i , ▁are ▁distinct ly ▁dark er ▁in ▁skin ▁colour ▁and ▁their ▁pen is ▁is ▁bent ▁at ▁an ▁ac ute ▁angle . ▁The ▁struct ural ▁characteristics ▁of ▁their ▁ul tras ound ▁calls ▁are ▁able ▁to ▁be ▁disc ern ed ▁in ▁son og rams , ▁although ▁imper fect ▁recording ▁conditions ▁may ▁not ▁allow ▁them ▁to ▁be ▁distinguished ▁from ▁some ▁other ▁ves pad el uses . ▁ ▁The ▁e ch ol ocation ▁calls ▁are ▁em itted ▁at ▁a ▁frequency ▁of ▁ 3 8 ▁to ▁ 4 6   k Hz , ▁and ▁visual ▁output ▁of ▁signals ▁received ▁by ▁bat ▁detect ors ▁are ▁class ified ▁as ▁" cur ved ▁calls , ▁tail ▁absent ▁or ▁up - s we eping ". ▁ ▁Distribution ▁and ▁habitat ▁ ▁An ▁en demic ▁of ▁Tas mania ▁and ▁the ▁southern ▁regions ▁of ▁Australia , ▁relatively ▁common ▁in ▁coast al ▁and ▁sub - co ast al ▁habitat . ▁The ▁distribution ▁range ▁extends ▁from ▁sout heast ▁Queensland ▁to ▁the ▁E y re ▁Pen ins ula , ▁then ▁restricted ▁to ▁the ▁coast ▁until ▁their ▁deeper ▁in land ▁ing ress ▁to ▁the ▁sem iar id ▁and ▁for ested ▁regions ▁of ▁south west ▁Australia . ▁The ▁south west ▁of ▁the ▁continent , ▁across ▁an ▁area ▁to ▁the ▁north ▁of ▁Per th , ▁is ▁a ▁region ▁of ▁low ▁divers ity ▁in ▁micro bat ▁tax a ▁and