Sexing Gouldians

[finchandlovebird]

I know many of you are such experts you can identify colors from new born chicks. Your posts always amaze me. But what about sexing Goulds?
I have 4 who fledged 12/29, 3 green & 1 blue. When will I be able to identify their sex? They still all look the same, not coloring out yet. I know there's a male among them 'cause I saw him "dancin'" in front of his mom a long time ago. When should they be "coloring out" & when should I be able to identify their sex? Some say "singing", but don't both sexes sing?

[Dayna]

Hens are always duller in color than cocks. Cocks sing, hens don't. Depending on what goulds you paired together can tell you what gender the chicks will be from their back color alone. I haven't had finch babies that young but my canaries would start moulting right after I seperated them from the parents and usually finished around 4 months.