Which Burung budgerigar breeds come in Muka hitam?

Club breed standards describe Muka hitam for the Budgerigar.

Burung budgerigar pattern

Muka hitam

Budgerigar mutation: black wavy markings across the body and a black face, the mask's markings fusing into the throat spots (WBO Blackface).

2 Burung budgerigar breeds list Muka hitam. It is in a club standard for 2 breeds.

Breed	WBO
Budgerigar	Mengikut piawaian (“Blackface”)
BudgerigarBlackface	Mengikut piawaian (“Blackface”)