CATERPILLAR of the GREAT MORMON BUTTERFLY
by Haentjens Raphaël - Macropixels
These caterpillars have a interesting defense mechanism — First they have fake eyes on either side of their head to make them look like a snake, then they have an organ in their head called the osmeterium. When threatened, the caterpillars display the osmeterium, which resemble two brightly colored ‘horns’ sticking up from the caterpillar’s head. The osmeterium can emit foul-smelling terpenes. The smell, the horns and the caterpillar’s thrashing movements, helps to ward off predators.
Great Mormon Butterfly
Io Moth Caterpillar