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Mallard Ducks Choose a Mate by Drake’s Bill Color

Mallard Ducks

The color of a Mallard’s bill indicates its state of physical and reproductive health. Therefore, Mallard ducks can choose a healthy mate by assessing the drake’s bill color. Strange, but true. Here’s how it works:   Carotenoids and Free Radicals Carotenoids influence the red, yellow, and orange hues of a duck’s feathers, skin, legs, and […]

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