The Southern Emu-wren is a tiny bird with a long (10 cm) filamentous tail, made up of six feathers, which is usually held upright. Male birds are grey-brown streaked black above, warm tawny brown below, with a distinctive blue chin and throat and some blue around the eyes. Females are similar but lack the blue colouration. This species is shy and has a weak flight, preferring to spend most of its time low in dense cover and will run like a mouse, with its tail down.