[nev90]

Kiochi is a spangle cobalt
Chihiro is a type 1 yellow face grey
Benny is a type 2 yellow face recessive pied sky blue
Joon is an opaline cinnamon sky blue

Benny looks like an adult but, because of his mutation, he won't develop iris rings to help us guess his age. Joon appears to be about 3 or 4 months old

 

[nev90]

No, I'm telling you, these birds are over a year old. And how's benny blue...? *confused*

Benny is a type 2 yellow face and (as often happens with T2s) the yellow colour has "run" into the white making most of his body a lighter yellow than his face. His base colour is sky blue even though he has very little of it and what he has is also affected by the yellow "running". He is a blue based budgie so if he was mated to a blue or white he would produce blue chicks (some with yellow faces) but no green series chicks

Loon looks young because she has a very smooth white cere and her iris rings have not developed

 

[nev90]

They are both opaline but do you have a better picture of Chiyo, preferably a front and a back view, because I think he has another mutation as well. They are both male. The marks on Trevor's beak are normal, they'll disappear as he matures

 

[nev90]

Thanks for posting the pictures. The blue colour doesn't look quite normal for sky blue but I can't see another mutation other than opaline. Maybe it's the camera flash

 

[nev90]

If the tail is black along with the blue cheek patches then they have a grey factor with the opaline sky blue. An opaline sky blue would usually have purplish cheek patches and a dark blue tail

 

[nev90]

Sorry to bring up and old thread, but he DOES have iris rings. What does this mean...?

As he has iris rings he must be a double factor dominant pied. This means that both of his parents were dominant pieds and he has inherited a double dose of the mutation. It is the pink cere and the orange beak that makes him look like a recessive pied