A brilliant toddler has told me that a butterfly can鈥檛 be an insect because it has more than six legs when it鈥檚 a caterpillar. He鈥檚 wrong, but I鈥檓 not sure why. What should I tell him?
Lynn Tylczak, Albany, Oregon, US
This article appeared in print under the headline 鈥淚nsect impostor?鈥�
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