The song of Purple-crowned Fairy-wrens is quite unlike that of any other fairy-wren in Australia. A loud, repeated "chicka-chicka-chicka-chicka", usually initiated by one of a pair, followed by the other to form a duet which lasts five seconds or so, then subsides gradually to an excited chattering of notes resembling the normal contact calls. Other fairy-wrens do duet occasionally, but with Purple-crowned it is the norm and they coincide so well, the combined effect is sufficient to penetrate the sound of rushing water so often part of their streamside environment. Sample 051-200 is an example of duetting by the western subspecies recorded at Drysdale River, W.A. Sample 134-590 is also duetting, this time by the eastern subspecies on the Gregory River at "Riversleigh" in NW Queensland. Songs of several birds from each of these locations have been compared and there do not appear to be any significant differences. Sample 050-500 is a typical example of the 'tzit" contact call given fairly continually by most birds while they are foraging and it is distinctive enough to be a good guide to their presence. I recorded this at Manning Creek on Mount Barnett Station, W.A.