Procrastination is a six-and-a-half month old single-factor spangle and going through his first molt. I noticed the barring on his head had blue splotches when he started to molt. I found it odd but didn't think much of it. As he has continued to molt, more and more blue barring is showing up (I'm pretty sure ALL of his new feathers have blue barring where it used to be the lighter black barring that single-factor spangles have).
I have never come across this before and was wondering what is causing the color change of his barring. Also, should I expect him to return to normal the next time he molts?
I'm not sure how well you can see his blue barring in the pictures but I tried to get a couple pictures to show the color. He is still going through his molt and his "baby" feathers still have the normal barring color for a spangle. So he currently has both the normal barring and his new, strangely blue, barring.
Sometimes spangles get suffusion, which is body colour showing up on the wings and head areas. I'd say that is what this is. It could also indicate that he is a spangle opaline but from those pictures that doesn't seem quite right.
Thank you for the information. I'm excited for Procrastination to finish molting.
I'm not the best at identifying opaline but I know his paternal grandmother was opaline (very distinct on her). Procrastination's mother has a combination of mutations (spangle, clearflight pied) and I can't tell for sure if she is opaline too... but I don't think she is. Either way, it is fun to see him gain beautiful blue markings from head to tail.