Button quail sexing methods?

[duckncover]

I can't seem to figure out who is who. They are 7 weeks old and I want to make sure I have at least one male female pair together.

 

[Nabiki]

In the first picture the one with the bib is male. The tuxedo isn't feather sexable

The second picture is a male.

The third picture, the dark one with a bib is male, the pale one I'm not sure on, but there is a faint bib, so possibly male.

The fourth picture, female

The fifth picture,not feather

The sixth picture, may not be feather sexable, but I m thinking female.

 

[Hiram Means]

The fourth picture, female

With male in foreground

 

[Hiram Means]

I would say #6 is male because of the blue