Transformation
From caterpillar to chrysalis: the J-hang
After about two weeks of nonstop eating, a monarch caterpillar stops mid-bite, wanders off its milkweed, and spins a tiny silk button. It hooks its tail end in, lets go with everything else, and hangs upside down in the shape of the letter J. For the next half day it barely moves — because inside, the biggest renovation in nature is already underway.
Then, in just a few minutes, the skin splits behind the head and peels away to reveal the soft green chrysalis, which hardens into the smooth, gold-dotted case in this video. That gold band isn’t decoration, by the way — it’s a row of tiny reflective beads, and nobody fully agrees on why it shines. It just does, like everything about this stage.
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