Eye spots on the outer hindwings of a giant owl butterfly Caligo idomeneus La Selva Reserve, Amazon Basin, Rio Napo drainage, Ecuador Photographed under controlled conditions

Eye spots on the outer hindwings of a giant owl butterfly, Caligo idomeneus, La Selva Reserve, Amazon Basin, Rio Napo drainage, Ecuador, Photographed under controlled conditions (Photo by Wild Horizons/UIG via Getty Images)