Stephen Dalton / Owl butterfly (Caligo eurilochus) sheltering from rain

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

Sean Crane / Forest Giant-Owl (Caligo eurilochus) butterfly wing with false eye spot, Ecuador

Edwin Giesbers / Close-up of eye on wing of Owl butterfly (Caligo eurilochus) Costa Rica

Nick Garbutt / Close up of eye on wing of Owl-eye Butterfly (Calligo eurilochus). Forests of Napo River, Ecuador

Nick Garbutt / Owl-eye Butterfly (Calligo eurilochus). Forests of Napo River, Ecuador

Nick Garbutt / Owl-eye Butterfly (Calligo eurilochus) shortly after emergence from coccoon. Forests of Napo River, Ecuador

Nick Garbutt / Close up of eye on wing of Owl-eye Butterfly (Calligo eurilochus). Forests of Napo River, Ecuador

Mark Moffett / Forest Giant-Owl (Caligo eurilochus) butterfly pupa in chrysalis, South America

Pete Oxford / Owl butterfly {Caligo eurilochus} Amazonia, Ecuador

Juan Manuel Borrero / Owl butterfly {Caligo eurilochus} Monteverde NR, Costa Rica

Brian Lightfoot / Owl butterfly {Caligo eurilochus}