This photo is taken near the CSIRO gate, the red Callistemon is called 'Firebrand' and the pink one is Callistemon polandii called 'Peak Downs'.
Callistemon pearsonii. The last with the butterfly (sorry, I'm not sure which - it wouldn't open its wings!) is not on a Callistemon but a Melaleuca - Melaleuca Sieberi these two genus are hard to tell apart. Indeed, I have read on wikipedia that Callistemon is now placed in the genus Melaleuca.