Blue Pipevine Swallowtail Butterfly

Host plants for the caterpillars include the Pipevine (Aristolochia species), including Dutchman's pipe (A. californica), Virginia snake root (A. serpentaria) and others. Pipevines confer a poisonous quality to the larvae and resulting adults, much as the Monarch butterfly obtains protection by feeding on milkweed, or heliconiines by feeding on passion flowers.
• Nectar resources
Adults seek nectar from flowers, including thistles (Cirsium species), bergamot, lilac, viper's bugloss, common azaleas, phlox, teasel, azaleas, dame's rocket, lantana, petunias, verbenas, lupines, yellow star thistle, buckeye, Wild Ginger and butterfly bush,