A fake head might sound like a magician’s prop, but for some butterflies it’s a lifesaving illusion. Many species—including the Bartram’s scrub-hairstreak, which lives exclusively in Florida’s pine rocklands, one of the world’s most critically endangered habitats—display markings on the back of their hind wings that resemble a face. A bright patch of color, faux “antennae,” an eyespot, head-shaped contours, and convergent lines combine to look like a creature staring upward.