These two locations are from my observations.
In this video, we can see more strange pupate locations.
https://www.bilibili.com/video/BV1F3411n7JN/
What other strange location do you see?
fwiw, butterflies seem to purposely leave host plants to pupate. This is about monarchs specifically, but in my experience it extends to most butterflies and even moths.
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Power cords, if they escape in my office. This is particular frustrating with the species that go into diapause for a few years.
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