Sorry for poor quality photo, but hoping someone can identify?
Bibra Lake, Western Australia.
I have a few different thoughts.
It has distinct netted secondary/tertiary wing pattern in dark blue which isn't visible here..
Smaller than WoodSwallow size, bigger than fairy Wren etc size.
G'day, I'm leaning towards a White Breasted Robin at a quick glance on my phone.
Cheers Muz
Good call. I'm thinking it is a little bigger and not as plump though...?