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melanism

melanism

سَفَع

melanism

سُفْعَة

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Adaptive melanism has been shown to occur in a variety of animals, including mammals such as squirrels, many felines and canids, and coral snakes. en.wikipedia.org

The depletion of tigers in those regions may have eliminated the carriers of genes for melanism and pseudo-melanism. en.wikipedia.org

They also show an adaptation to high altitudes called altitudinal melanism. en.wikipedia.org

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