Black swallowtail butterfly
Papilio polyxenes
insectView on iNaturalist
Large black butterfly with yellow spot-bands and blue hindwing spots. Bay Area native; caterpillars feed on fennel, dill, and native parsley; garden pollinator.
Plants that support Black swallowtail butterfly
3 plants
American Cow-parsnip
Heracleum maximum
perennial herb
Caterpillars feed on plant foliage; multiple generations Apr-Sep in California
Bay Area native
American Deervetch
Vicia americana
vine
Adult nectar source; multiple generations in California
Bay Area native
American-hemp
Apocynum cannabinum
perennial herb
Adult butterfly visits flowers for nectar during migration and breeding
Bay Area native