Generations have watched in wonder as yellow-and-black striped caterpillars fold into green-and ... wings around 5 to 12 times per second — much more slowly than the average butterfly, who flaps about ...
Generations have watched in wonder as yellow-and-black striped caterpillars fold into green-and ... wings around 5 to 12 times per second — much more slowly than the average butterfly, who flaps about ...
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