Penguins are very unique animals. Some people wonder if penguins have feathers. Well, they do. Their feathers are short, and they are waterproof. Some people also wonder if penguins have knees. It is true, penguins do have knees. You can not see them because they are covered with feathers. Penguins also do not have any teeth, like any other bird. A penguin's ears are in the same place as ours. Their ears are also covered by feathers, just like their knees. Most penguins are black and white. The largest species of penguins are the Emperor penguins. They are 120 cm high, and they weigh up to 30 kilograms. The smallest species is the blue penguin, only 25 centimeters high, and 1 kilogram.
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