The tree is a native Fig - not the ones that people usually eat! When I looked up "fig tree" in my books about local native trees I found that there lots of fig trees that grow locally. Without more experience I couldn't ID it although a friend suggested that it might be a Ficus rubiginosa.
I have taken lots of photos of Figbirds (Sphecotheres viridis) but never before one in a Fig Tree.
There were other smaller birds up in the very top of the tree but I couldn't see them properly in among the leaves. The only other bird I saw clearly was this little Red-browed Finch ( Neochmia temporalis) which was using a puddle to take a drink. I used to call this a Red-browed Firetail but my birdbook says it is a finch!