It is great bowerbird ( _Chlamydera nuchalis_ ). It is much bigger than the mentioned flycatcher. I have seen both species and there is no room for confusion. Most of the pictures online are birds perched on the ground next to their "buildings", but I found a picture that should convince you.
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Notice:
-Stout bill
-Patterned wing coverts
-Marks on the undertail coverts