Tiger swallowtail genome gives clues to insect’s stinky defense

Eastern tiger swallowtail (Papilio glaucus) caterpillar

As caterpillars, Eastern tiger swallowtails have a forked organ on their heads that emits smelly compounds to deter predators. A look at the insect’s genome explains how it may have evolved this stinky biological warfare. 

Edith Smith/Shady Oak Butterfly Farm

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