This little sleepy one has been tricky to identify but in consulting with three prominent birders we are leaning towards this being a speckled warbler based on the pattern of the striation on the ventral side, the bi-coloured tail feathers and the colouring of the dorsal side and wing coverts.
If that is the case this will be the 2nd out of 10,000 digital records of speckled warbler at Wonga Wetlands.