An interesting "Mutation" that occasionally turns up in breeders nests is the Tri Coloured Bengalese. Unfortunately As far as is known nobody has discovered how to
breed this colour by design, despite many fanciers trying. I place some examples here for your interest, not many as they are few and far between

The last thumbnail here is a bird bred by Mr Peter Hill, it was bred from Self coloured birds and shows no
 White, but I believe it to also be a form of tri colour...
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