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There are several on the last remains of the parsley. 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.
Parsley in an herb garden box.
Most of these last caterpillars have been falling prey to jumping spiders and wasps.
Spotted on Oct 10, 2012
Submitted on Oct 11, 2012