Possible sex of fledged Gouldians

[davlee]

Male is yellow back. Hen is green back. Young are yellow. Any idea what sex they are please?

[Craig52]

If Euro yellow, the mutation is sexlinked dominant so the yellow back being male will give yellow hens.
If it was the opposite you would get sf cock birds and normal hens.
Sometimes times but rarely you can
get single factor cocks and hens.

[finchbreeder]

Do you know if they are Euro or Aussie yellow?

[davlee]

finchbreeder, no I don't

[finchbreeder]

Inheritance is different in each.
Can you put a pic of the parents up?

[Cdunell]

A pic of the parents might help if you have one