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How do wild and domesticated Muscovy ducks differ in appearance?

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Wild Muscovy ducks are glossy black with white wing patches and green and purple-blue iridescent feathers that are most noticeable atop their wings. Domesticated Muscovy ducks are larger and heavier and have varied coloration and more white feathers. In wild populations only the males have red facial caruncles, while in domesticated ones both males and females have them.

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