So there has been a lot of lovin' going on amongst my guys lately! I am trying to discourage breeding, but I have some very determined budgies! They don't care if it's dark, they still sing

but on the plus side after seeing Marli invite Smudge to mate with her, and then watching his bungled attempts at it, seeing Marli get bored and give up on him

it seems Smudge is definitely a boy! I wondered as my boy Skylar has taken a shine to Smudge and they do little flirty dances together! Marli and Marlow's love affair seems to have cooled off too! But anyway, to the point

Smudge has been confusing me on his mutation too, he seems to have a little green vest and is a diluted colour when compared to Sparks who has no dilution (Sparks is another yellow I have), I thought maybe recessive pied like Sparks, but Smudge is now getting quite a blue cere and I am sure I see some faint grey iris rings coming in.
Sorry for the poor photo, it was part of a bigger one with most of the budgies in it so I've cropped it down to try and make him easier to see. He's such a tiny little boy