Piotr Naskrecki / Forest Giant-Owl (Caligo eurilochus) butterfly chrysalis, Costa Rica

Piotr Naskrecki / Forest Giant-Owl (Caligo eurilochus) butterfly showing false eye spots, Costa Rica

Nick Garbutt / Close up of eye on wing of Owl butterfly {Calligo eurilochus} Ecuador

Nick Garbutt / Wing detail of Owl butterfly {Caligo eurilochus} Mindo Cloudforest, Ecuador

Pete Oxford / Owl butterfly (Caligo eurilochus). Ecuador, Amazonia, South America

Michael & Patricia Fogden / Forest Giant-Owl (Caligo eurilochus) butterfly flying in the rainforest, Costa Rica

Konrad Wothe / Forest Giant-Owl (Caligo eurilochus) butterfly wing showing eye-mark, Germany

Norbert Wu / Forest Giant-Owl (Caligo eurilochus) butterfly close-up of false eye spot on wing, Costa Rica

Pete Oxford / Forest Giant-Owl (Caligo eurilochus) butterfly chrysalis, Mindo Cloud Forest, Ecuador

Brian Lightfoot / Giant owl butterfly {Caligo eurilochus} resting on leaf. Central America.

Karine Aigner / Giant owl butterfly (Caligo eurilochus) left, and a Blue Morpho butterfly far right, emerge from their Chrysalis at the Mindo butterfly Farm (Mariposas de Mindo) Mindo, Ecuador.

Karine Aigner / A giant Owl butterfly (Caligo eurilochus) emerges from it's Chrysalis at the Mindo butterfly Farm (Mariposas de Mindo) Mindo, Ecuador.