one of the instars of the Black Tiger Swallowtail butterflly eating Aegopodium podagraria 'Variegatum'
found 2 of these caterpillars on the Aegopodium podagraria 'Variegatum' in the garden.
The plant is highly invasive and never seemed to have a natural pest.
I don't recognize the caterpillar, but it would be interesting to know
which species this is as it might be useful for eliminating this invasive plant.