I have several quail of different ages, but none older than 2 months. Ii though you could tell a male by the cinnamon color on its chin/chest....but I have 5 (the oldest group) and 4 of them have the cinnamon color, but I have not heard them crow at all. Nor do I have any eggs from them, and I haven't seen any mating, tho two had small bloody spots on their heads, I assume, from fighting (males?) The next oldest group (there's only 2 in this batch) already has one crowing, (one A&M coloration, the other regular) also no eggs, but I think they are only about 4 weeks. The rest are about 2-3 weeks and are a mix of A&Ms and regular Coturnix. Too young to tell, I think. I want to keep one or two males and we willl be eating the rest, but aside from staring at them for hours to see them mate, how can I tell the males from the females? Any info on this would be lovely! Thanks so much!