Caterpillar of black swallowtail
This caterpillar absorbs toxins from the host plants, and therefore tastes poor to bird predators.[9] The black swallowtail caterpillar has an orange "forked gland", called the osmeterium. When in danger, the osmeterium, which looks like a snake's tongue, everts and releases a foul smell to repel predators.
Its caterpillar is called the parsley worm because the caterpillar feeds on parsley.
en.wikipedia.org/wiki/Papilio_polyxenes
Columbia, South Carolina
Caterpillar of black swallowtail
This caterpillar absorbs toxins from the host plants, and therefore tastes poor to bird predators.[9] The black swallowtail caterpillar has an orange "forked gland", called the osmeterium. When in danger, the osmeterium, which looks like a snake's tongue, everts and releases a foul smell to repel predators.
Its caterpillar is called the parsley worm because the caterpillar feeds on parsley.
en.wikipedia.org/wiki/Papilio_polyxenes
Columbia, South Carolina