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Old 21st January 2017
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Re: Spotty Blackbird

Very interesting genetic abnormality, indeed not only confined to birds but also humans.

As drmark may verify, in humans it is called viti ligo due to interracial beeding.
My brother and I have white pigmentation patches on top, sides and back of our head due to our Chinese / Irish heritage.
It appeared only a few years ago. If it spreads I may become entirely white ...
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