Eastern Swallowtail butterfly caterpillars (first week in June 2018)

At the end of May, I thought I saw a hummingbird in the garden.  But it was an Eastern Swallowtail butterfly, with black wings and blue markings.  She laid eggs on our dill plants, one of three types of plants the caterpillars will eat.  The butterflies are good pollinators and the caterpillars don't eat eggplants, tomatoes, bell peppers, etc., so we want to keep them around.

Caterpillar on dill.  We use the dill to make homemade ranch dressing.

I think there are seven caterpillars in this photo.  I only see six.