Penguin problems

Scientists say these penguins are actually 4 different species

See if you can tell the difference between these 4 species of penguin.

Two young gentoo penguin chicks happily running on the grass field in the Falkland islands.  Wildlif...
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The world just gained 3 more penguin species.

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According to a new paper in Evolution and Ecology, what was thought as a single species — Gentoo penguins — should actually be classified as four species.

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