Differences in Goffin Cockatoos?

[Birdluver]

I was wonder if there are any differences in the sexes of Goffin Cockatoos? Is a certain sex bigger or smaller, louder or quietier , tone of squak is different, the eyes are darker, and etc?

The reason why I was wondering, because I have a 9 year old Goffin named Pretty Girl, but not really sure if she is a girl.

I am also fostering a DNA sexed male Goffin. He seems to be bigger and his tone of screaming/swaking is deeper.

Thank you
Carrie

[Birdluver]

Have any of you heard of differences between males and females?

[The Outlaw]

For the record, what I know about toos wouldn't fill a thimble. I do remember reading somewhere that the female's eyes are a different color than males. Unfortunately, I can't really remember which is which.

THE OUTLAW

[The Outlaw]

However, visual sexing of the lighter colored cockatoos is not as accurate. These birds fall into two groups (see table below). The larger species can often be sexed based upon the color of the birds' eyes. In these species, males have black or dark brown irises and females have lighter brown, reddish brown or burgandy colored irises. Females develop their eye color as they mature, so a bird may be 3 to 4 years old before this technique can be applied. Sexing by eye color works much of the time, but it is not completely accurate. Even experts have mistaken a dark eyed female or a lighter eyed male for the opposite sex.

The smaller cockatoo species such as the Goffins, Ducorps, Bare Eyed and Slender Billed are almost impossible to sex visually. Many people have tried judging the sex of these species by examining the color of the eyes. However, it has been found that the eye color seems to vary by individual rather than by sex.

By Carol Highfil