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Did you know ducks and geese are waterproof? Well at least their feathers are! The ability for waterfowl to keep dry has to do with the structure of their feathers and the oils they groom themselves with. At a microscopic level, the outer layer of feathers of adult ducks and geese, also known as contour feathers, have what are called barbicels on them. These small, interlocking structures create a physical barrier to water. However, these alone do not make waterfowl waterproof! Instead, preening
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