Black Swallowtail caterpillars face a big world when they pop out of their tiny eggs. Facing many predators like foxes, frogs, ants, and wasps, they have to defend themselves. Not to worry-they have a secret weapon, a stinky-cheese aroma. When the Black Swallowtail caterpillars feel threatened, they protrude their orange horns that have a stinky-cheese smell. Will this be enough to get them to metamorphosis and becoming beautiful Black Swallowtail butterflies?