I have only a few owls than I would expect but have seen 2/3 Australian Frogmouths and the only Australian Owlet Nightjar. The Owlet Nightjar is one of my favourite birds has it looks so cute, they are said to mimic squirel gliders which are also nocturnal and live in tree hollows.
See more raptor photos here
Australian Owlet-Nightjar - Aegotheles cristatus
Tawny Frogmouth - Podargus strigoides
Papuan Frogmouth - Podargus papuensis
Southern Boobook - Ninox boobook
Powerful Owl - Ninox strenua
Tawny Owl - Strix aluco