I'm guessing grey one is a male one.. since he has a thin white bib (he doesn't have pink/red/rusty vent feathers..but he does crow) btw, does rusty mean brown? I have a black one slowly changing into blue and brown(on vent). Sooo pretty Anyway. Doesn't button quail crow like a puppy? That's how my mom describe it. It sound like little puppy crying for mommy. Other times I hear weird sound.. like... I don't know but it really is weird/funny/but cute. lol I'll try to post vent feather pic later.. They are now having sand bath... splashing sand everywhere. So please help me identify sex and color of my button quails!