It never fails, as soon as my Dutchman Pipe slowly grows back, the polydamas swallowtail caterpillars return. I spotted at least six this morning. The caterpillar will grow to approximately 5.3 centimeters before creating its chrysalis. It’s fun to watch these guys grow as they change in texture – from a rough textured appearance to more of a smooth texture – and can change in color ranging from dark brown to light tan.