Moving between trees in search of Sawfly lavae to eat. Once if found a bunch it would eat three or four before moving on to a new bunch. I saw it eat around 20 and got a good video of the technique of snipping off the heard and extracting whatever part it likes to eat. After it finished eating it started chewing on pieces of dead wood.
Thanks Partrick - much appreciated he is avoiding the sac of concentrated eucalyptus sac that the spitfire dribbles when disturbed. Avoidance of Eucalyptus dribble may be why he was moving between clumps rather than staying to eat a whole clump