CNN – African penguins, unlike their relatives that live in snow and ice, thrive in the cold currents of the South Atlantic Ocean. But when they come to land, their thick black coat absorbs the heat, and they desperately look for cover – both for themselves and their fragile eggs. Historically, the penguins dug burrows in layers of guano – accumulated seabird and bat feces – that lined Africa’s penguin colonies, but in the 19th century, traders started selling guano as fertilizer, leaving the penguins and their eggs increasingly exposed to predators and the scorching sun.
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