This means that they’re considered leucistic. It’s the result of a variant (also called an allele) of the mc1r gene, which is involved in the production of the pigment melanin. As this ...

But unlike in cases of albinism, leucistic animals are not totally devoid of pigmentation. Which might be why this particular bird still has regular-coloured eyes, despite its pale plumage.

I set up a groundblind and waited seven hours to get this shot. What a rare privilege!" says Terry Spencer. Learn the difference between albino and leucistic birds.

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