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Penguins feet are set far back of the body. Which allows them to stand upright, which is more difficult to do in ducks (mallards, for example) who have their legs more in the middle. Therefore, if there is ice to slide on, it is often quicker to lay on their stomachs and push with their feet, especially down an icy slope, that to walk upright with a penguin's waddle.

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9y ago

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