Hi there. Ring Neck parrot sexes can be determined after they reach adulthood and their adult feathering, with the male having a distinct ring at the neck, and females with none or a light shadowy ring. At 2 months old, the only way to determine the sex of the chick is by a DNA test, either by a feather or a blood sample. That test is not expensive here in the US, not sure where you are located. You send the sample to them by mail.