The Abbott's Sphinx Moth (Sphecodina abbottii) caterpillar, have discovered that best way to [hopefully] survive their harsher younger years is to have a big ol' eye spot on their butts. This isn't just your average eye spot, though. I mean this thing looks incredibly real - right down to the white reflection spot in the "pupil." If you poke the caterpillar, the little guy will squeak and try and bite the attacker.