Mutation

There are many mutation of this bird , Here are some example :

Budgerigar mutations
Color	Blue	Cinnamon	Clearwing	Dark Dilute	Dominant Clearbody
	Ino	Slate	Violet	Greywing	Sex-linked Clearbody
Fallow mutations	German	English	Scottish
Grey mutations	Recessive	Anthracite	Dominant	English
Yellowface mutations	YF 1	YF 2
Pattern mutations	Mottled	Blackface	Opaline	Spangle	Saddleback
Pied mutations	Recessive	Clearflight	Australian
Feather mutations	Crested	half circular	Feather duster

There are also some other mutation :

Mauve , Full Body Gray (FBG) , Lecewing , Dilute , English Budgerigar , Exhibition Budgerigar