Of course, these butterflies can't eat her. There are butterflies that have eaten people. But not around here. And to be fair, Izzy doesn't know about those incidents. If she had known, she'd be even more terrified. Besides, those man-eating butterflies were flukes. Science experiments, evil plots, and malfunctioning alien probe mutations. They're not exactly common. Although they have inspired a not-insubstantial amount of media. Some more exaggerated than others.