Tangerine White Back
This mutation is very much like the Tangerine Pearled, with the addition of a "white back". The "white back" is a result of a double dose of the modifier gene (M//M) which only works on the tangerine gene. Should be white from the tail to just below the lower neck region. The neck ring & flight feathers are white. Eye coloration as in Tangerine Pearled.