PASSERIFORMES: Ptilonorhynchidae
Ptilonorhynchus guttatus
A Western Bowerbird inspects his bower.
The piece of white chalk may have been introduced by some other party, I didn't see how it got there, but in any case, the bowerbird didn't like it in the centre of the bower and moved it to the approach where there were bits of bone and small white plastic items.
I concurred with the bowerbird's taste. The collection of round green seeds looked much better on their own to me. Who's a bird-brain?