I'm growing dill this year mainly to use in pickling, so I don't mind so much that the little patch of fragrant herbs are being consumed by these beautiful black swallowtail caterpillars.  At least, I won't mind until I go to make pickles, in which case… bummer.  So many of these little guys are hanging out that I'm thinking another round of seed sowing is in order so they won't run out of food-- I would love to see some black swallowtail chrysalises in the garden!  Now to figure out where that seed packet went...