I am guessing and I am not an export in telling the gender but I think your jack maybe a girl budgie... Your budgie has pale blue with white. When they get older the blue turns to brown. I may be wrong. When you have a male the cere is a purplish blue...
I think you might have to wait for a breeder on the form to tell you the gender.... Very tricky to tell....
I think you might have to wait for a breeder on the form to tell you the gender.... Very tricky to tell....