Lepidoptera: Moths and Butterflies - Alex Wild Photography
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Papilio polyxenes - eastern black swallowtail - caterpillar with defensive osmeterium everted.

Urbana, Illinois, USA

Papilio polyxenes - eastern black swallowtail - caterpillar with defensive osmeterium everted. Urbana, Illinois, USA

Papilionidaeinsect defenseslepidoptera