Once the caterpillars grow to about four or five centimeters long, they start hunting for dark, secret corners. Then they start arching their bodies, and after winding and writhing for a time, they gradually end up as jadelike chrysalises. This whole process really looks like it must take a huge amount of energy.
當幼蟲長到約 4 ∼ 5 公分，便尋找一隱密處，倒掛著慢慢地彎曲身體，在一陣痙攣式的扭動後，逐漸結為翠綠色的蛹，感覺得出來這是需要很大的力量的。