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These birds evolved in different hemispheres, millions of years apart, but from a distance you would be hard-pressed The giant penguins, like these Kumimanu, that lived in Aotearoa New Zealand around 60 million years ago bore a striking resemblance to some plotopterids. (Mark Witton) to tell them apart, plotopterids looked like penguins, they swam like penguins, they probably ate like penguins -- but they werent penguins.