I think its about 12 weeks....I can't remember exactly. It came in my random CL find that was all supposed to be jumbo coturnix. This one is pretty small compared to the browns. I have a few others that are this coloring as well. This one is in a pen of 3 birds that has been my "trouble" pen. I lost one bird a couple weeks ago (that got attacked by the others) and just pulled a second one out that was loosing feathers fast. So I'm down to 3 that are all the dark color and I can't sex them. I'll look at the sticky again, but I did try once with no success. I've got one banded as a male-I've seen him crow. But not sure on the other 2. I think the smallest one in the pen is male, because I've watched the other male picking on him now. But this one doesn't seem to fight with anyone, so I was thinking maybe a girl. Thanks for the help!