Duck Feet

The large webbed feet of ducks paddle alternately like canoers rather than rowers. Their feet spread out for the power stroke, then fold up for the recovery stroke. There is a lot of motion underwater without showing any exertion from above. Ducks floating calmly on a pond are the epitome of serenity, but their continuous efforts, unseen above the surface, are constant and powerful even when they simply stay in place.

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