Why Does Water Roll Off a Duck’s Back?

This happens because oil and water don’t mix.

water off a duck's back

When a duck is swimming or out in the rain, the bird secretes an oil from glands near its tail. With its bill, the duck rubs the oil over its body.

The oil keeps the water from soaking through the duck’s feathers, making the bird “waterproof.”

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.

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