6 week old quail, help with sexing

[Lalegid]

I have 3 6 week old quail, I was wondering what sexes they are and if anyone could take a guess based on their colours? I'm not sure how sexing works with quail.
Anyway, here they are. The brown one just crowed at me as I took the photo, lol! Not sure about the other 2, both yellow. The first photo is of the brown one, a male. The 2nd photo is one of the yellow quail, the last 2 photos are of the other yellow quail (terrible photos, it wouldn't stay still!)

 

[dc3085]

Golden mutations color sex the same as pharaoh (wild type) quail. Those both have speckled chests so they are hens. The other bird is a tibetan tuxedo and would have to be vent sexed or seen crow as you did.

 

[Lalegid]

Neat, thank you!