For easy reference here are the mutations in males that at adult hood do not have the typical blue ceres we often see.

All of the mutations except for double factor dominant pied will have a pink/purple cere when mature, not blue. They often do not change very much from the time they are a few weeks old through out their entire life.

Albino and lutino males will be all white or all yellow with red/ruby eyes. Lacewing males are white or yellow with cinnamon head, wing and tail markings. These mutations will have a pink/purple cere as adult males.

Male albino examples

Male lacewing examples

Dark eyed clear males will be all white or all yellow with solid black eyes and no iris rings. As adults they have a pink/purple cere.

Male dark eyed clear examples

Recessive pied males have pied markings, but have black eyes with no iris rings at maturity unlike a like a dominant or clearflight pied male. They will have a pink/purple cere at maturity.

Male blue based recessive pied examples

Male green based recessive pied examples

Male fallows both German and English will keep a pink/purple cere at maturity, which looks the same as when they are chicks.

Male fallow examples

While it is the most common in double factor dominant pied males, both dominant and clearflight pied males can have a mottled pink/blue pattern to their cere at maturity when the pied mutation effects it.

Male blue based double factor dominant pied examples

Male green based double factor dominant pied examples