These are the caterpillars on Day 3 (Saturday, September 13). They've grown a bit compared to the first picture, but still have the same coloring. Here's some wilting parsley. We remove the sticks, parsley, and caterpillars from the habitat for cleaning, usually every day. Cleaning consists of tapping out the droppings (called "frass"), then putting the sticks back in with fresh parsley and our charges.