Over the weekend nearly all the caterpillars finished growing and climbed to the top of their cups. We still have one very hungry caterpillar munching away :).
Most are hanging from the lid and will/have shed their exoskeletons one last time (5x in total) before they pupate (become chrysalides).
The pupa underneath will wriggle out of this skin, forcing the empty caterpillar skin up and away from itself. The pupae is light green with the lower body similar to a smooth caterpillar. The detailed parts will flatten into a more smooth and hard chrysalis enclosure.
They will not be disturbed for at least two or three days to allow them to safely harden into chrysalides.