Most people are likely aghast at why I would photograph caterpillar poop.  One of the most sought after butterflies in the United States is the indra swallowtail.  Those who know how to find their caterpillars oftentimes subject them to disease because they do not understand the shelf life of cuttings of the particular variety of parsley (Lomatium or Cymopterus) used to raise their caterpillar.  This photo shows frass from a healthy caterpillar of Papilio indra.  If the frass is wet, the caterpillar is showing signs of sickness and will die.