They can be recognised when in close vicinity (described in my Readers Digest/Birds of Australia), by their loud accelerating trill; 'tsee' of alarm; sharp 'prrip-prrip' contact call.
In the hot summer, a male wren (perhaps this fellow), is sometimes very determined to fight with his reflection in the windows here, while his little harem of may be four or five jennys, continue to fossick around the garden. I've often been concerned he'll knock himself up in the heat of the day!
These photos taken a little down the coast, in the Munmorah State Conservation Area/National Park.
Linking to: World Bird Wednesday
Later notation: After reading this article in Australian Geographic, I'm wondering if the 'harem' I'd referred to, could more likely have been the male fairy-wren and his jenny (female partner), with several juveniles.
Have left a comment there and await an answer.