hibernating natterer`s bat myotis natteri and daubenton`s bat myotis daubentonii with dew

bat both brickwork chiroptera condensation covered daubentoni daubentons dew diamondencrusted disused ecology england hibernaculum hibernating jewel jewels license looking myotis natterers natteri nocturnal pipistrelle protected railway similar species sussex torpid torpor tunnel two wet wild