Yellow Swallowtail Caterpillar

Yellow swallowtail caterpillar

Tiger Swallowtails are generalists, meaning the caterpillars are able to feed from a wide variety of host plants, including wild cherry, magnolia, birch, ash, cottonwood, and willow.

Are yellow swallowtail caterpillars poisonous?

"Don't eat 'em; they're quite poisonous." Both the caterpillar and the adult are poisonous. The caterpillars of the Pipevine Swallowtail feed on the poisonous host plant, Aristolochia, also known as the pipevine, Dutchman's pipe or birthwort. It contains the lethal toxin aristolochic acid.

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