Stack of storage containers; each with 1 caterpillar of Papilio indra minori.  There are small holes drilled in these containers not to give the caterpillars more oxygen; but to keep the frass as dry as possible in order to avoid disease.  Indra swallowtail caterpillars are more susceptile to getting sick as compared to their machaon group counterparts such as the anise, western black or eastern black swallowtails.