Several larvae begin to pupate despite not being developed enough, and in their weakened state they die in their chrysalis, never having the chance to spread their wings in the warmth of the sun.
因此，有些幼蟲在發育不全的情況下雖然勉強結蛹，但由於體質羸弱終至早夭，無緣在陽光下飛舞。