A larger species of microchiropterans (microbats) and the largest in Australia, the size is comparable to the megabat species (flying fox, fruitbat). The fur colour is grey, ranging in tone from mid, sometimes dark, to very pale grey at the back and whitish at the ventral side and head, The colour of populations is a geographic cline, becoming darker toward the coastal regions. A ring at the eye is dark. and colour of the wing membranes and other bare skin is pale and brownish. The interfemoral membrane extends the wing surface between the length of the legs. The great length of the ear, from notch at head to tip, is 44 to 56 millimetres and they are fluted in form; the inner margins of the ears are fused for half their length.