Sexing King Quails?

[AGG]

I only have one king quail left as its other friend somehow vanished from the aviary (no holes already checked twice). Im going to get another quail but dont know which sex i need, how do i sex king quails?

 

[ButtonquailGirl14]

pic? males will usually have red or rust color around their vents... they can be VERY hard to sex! believe me, i raised 18!

 

[DK newbie]

As long as they are mature (6-8 weeks old) and not white on the belly, they are usually pretty easy to sex.
If there is a bib (black and white striped pattern below the beak) they are males - but the bib shouldn't be confused for a white spot, which females can have too. In some colors, there is no bib and then you'll have to look at other things, like the rust red vent feathers mentioned above or blue/gray feathers on the sides of the bird, both of which are signs of a male.
If the bird is silver colored, the rust red vent feathers will be very pale, but they'll still be there if it's male.
If you flip the bird over and take a good picture of it's underside, we should be able to sex it - as long as the underside is not white.