I think it is still too early to tell yet. The picture makes them all look like they have a lot of white growing in. But that may just be the lighting. Keep watching for white flecks under the chin and the face stripe. They will be the boys. The heads of the boys will grow in darker than the girls also and you may start to see some black feathers there. Sometimes you can start to make guesses around 10 to 12 weeks, but depending on how they mature, it will probably take longer. Good luck!
P.S. The white on them really is as white as it looks in the photos. I was a little concerned about that. I guess if they were females, that would come in tan, huh?
See, that is what I originally thought...that all of them look like they are sporting white. But I didn't know if it was just the photo or a flash. If they are all really looking that white, then you may have a LOT of roo's there!!!
Well, all I can say is that at least they are growing up together and may not kill each other when they are adults! If you don't introduce any lovely ladys to them, they can probably live together in peace.
Did you hatch them yourself? Seems like when ever I incubate lately, I have an over abundance of roo's to hens. Must be something in the water around here.
I did not hatch these quail myself, I purchased them at, what I was told, 3 weeks of age. Let's see when that was so I can calculate how old they are....Well looks like they might be a little over a month old now.
Here is how they looked when I brought them home (supposedly 3 weeks old):