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Some of    stand out from the crowds. But few are as special as this all-black penguin. Andrew Evans, a    Geographic photographer, saw the black penguin on the island of South Georgia in the Antarctic.(南极)
He was there with a group of   to watch local wildlife. He took pictures and   of it. The black penguin showed “no different behavior than of his fellow penguins. In fact, he seemed     well,” Evans wrote on a National Geographic blog.
Almost all of the penguins we have seen are black and white. Biology experts say this penguin is different it is suffering from a special      . The illness turns his skin black. About one in every 250,000 penguins has the illness, but no      all-black ones have been    before. Because they are rare, very little is   about all-black penguins.