Animals
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DuckDucks’ feathers have evolved to be highly waterproof. Even when they dive underwater, their under layer of downy feathers will remain dry. All domesticated ducks, except the Muscovy duck, descend from the wild mallard Anas platyrhynchos. Ducks have rows of small bristles lining their mouth which allow them to filter water out of their beaks without losing their food. This filtering system is very similar to that of the blue whale. Despite the stereotype, not all ducks quack. It tends to be only the females that actually quack. All ducks do however have a range of communicative calls, including grunts, yodels and whistles. Ducks are perfectly adapted to water-life. Beyond their filtering system, their webbed feet are excellent for allowing them to move with ease in water as well as permitting them to easily walk on slippery river banks. Ducks use their beaks for feeding and for grooming themselves. They will pick dirt or debris out of their feathers.
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