When are zebra finches adults?

[Kathycorvette]

I have another 3 babies, about 5 to 6 weeks old. How long before I can tell if they are male or female?
thanks

[xz_zebs]

They should start showing markings soon. Here is a good timeline for zebras:

http://www.zbirds.com/breeding.html

Most of my zeb male babies start showing faint breast bars before anything else, but each bird molts a bit differently.

[Kathycorvette]

Thanks!
One of the birds is getting the brown on the sides with the white dots, so he's a male! We'll have to see if the other 2 are females.
I separated the male from mom and the babies because she lays so many eggs and wanted her to rest a bit before the next clutch! I didn't realize how much they multiply!
Do other kinds of finches breed as much?

[Sally]

Kathycorvette Zebras and Societies are the rabbits of the finch world. It is sometimes difficult to stop them, and separating the sexes is the only sure way.