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Pipevine swallowtail butterfly (P5142058) | by T. Christensen
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Pipevine swallowtail butterfly (P5142058)

Our native California Pipevine butterfly, Battus philenor, is a handsome swallowtail notable for its deep iridescent blue color decorated with orange and white polka dots. It favors coastal scrub and inland riparian areas, but essentially is found wherever the native California pipevine plant, Aristolochia californica (also known as Dutchman’s Pipe for its strangely shaped flowers) is found. It is the sole host plant for this butterfly, which is consequently entirely dependent upon it for survival.


Among many food plants is Jupiter’s Beard, Centranthus ruber, a volunteer in our garden, shown here. All butterflies, of course, have host plants where eggs are laid and caterpillars develop, as well as food plants that are sources of nectar during the insect’s butterfly stage.


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Taken on May 14, 2018