“…four native Northeastern swallowtail caterpillars side by side for comparison. A family portrait of evolutionary relatives, if you will. From left to right: the Eastern tiger swallowtail (Papilio glaucus), pipevine swallowtail (Battus philenor), Eastern black swallowtail (Papilio polyxenes), and spicebush swallowtail (Papilio troilus)…” — photo by Ansel Oommen, posted with permission.

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