
Eastern Black Swallowtail Caterpillar
The larvae of this species changes color quite dramatically with each molt. These pictures show the last instar, which is green with black bands dotted with yellow spots on each segment. I spotted this caterpillar on fennel (Foeniculum vulgare) in a rural garden.

The Black Swallowtail is a butterfly found throughout much of North America. It is the state butterfly of Oklahoma. An extremely similar-appearing species, "Papilio joanae", occurs in the Ozark Mountains region, but it appears to be closely related to "Papilio machaon", rather than "P. polyxenes".
Similar species: Moths And Butterflies
By Christine Young
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Uploaded Jan 9, 2018. Captured Sep 27, 2017 09:37 in 281 Main St S, Woodbury, CT 06798, USA.