Opaline, pearl, and yellow-sided

Opaline is a sex-linked gene given many names in different species.  While opaline is correct no matter which species you are talking about, you will also hear it called "pearl" in cockatiels and "yellow-sided" in Green Cheeked Conures. Opaline is a pattern altering gene that re-arranges the way the colors are distributed rather than completely subtracting entire an pigment group.

Rio the opaline of "yellow-sided" Green Cheeked Conure, lives in the UK with his owner, Triggs.

Rio the opaline of "yellow-sided" Green Cheeked Conure, lives in the UK with his owner, Triggs.

Another of the adorable Rio

Another of the adorable Rio

A group of Cockatiel babies learning to forage.  The group has both grey and opaline or "pearl" individuals as well as one pearl-pied.

A group of Cockatiel babies learning to forage.  The group has both grey and opaline or "pearl" individuals as well as one pearl-pied.

Pearl female and normal male. Photo courtesy of Emerald Tree Aviary-Farm.

Pearl female and normal male. Photo courtesy of Emerald Tree Aviary-Farm.

My absolute favorite photo of my lovely girl, Glorie.

My absolute favorite photo of my lovely girl, Glorie.

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