Exactly. They are members of the Commonwealth of Nations.
Any explanation why there are 4 big stars and one little one on this flag?
The layout of the Australian Flag, explained.
The five stars at the fly end are the Southern Cross (constellation), which is not visible from the Northern Hemisphere.
It's very recognizable in the Australian sky, much the same way as Orion and Ursa Major are here. Or, at least, I found it so.