e/Yellowface II budgerigar mutation

Information
has gloss	eng: The Yellowface II budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. In combination with the Blue, Opaline and Clearwing mutations, the single factor Yellowface II mutation produces the variety called Rainbow.
lexicalization	eng: Yellowface II budgerigar mutation
instance of	c/Budgerigar colour mutations