Ingo Arndt / Close-up of Owl butterfly (Caligo memnon) face, Central America (Captive)

Alex Hyde / Close-up of Owl Butterfly (Caligo memnon) head showing compound eyes and proboscis. Captive, originating from Central America.

Nick Garbutt / Owl-eye Butterfly (Caligo sp), Amazonia, Ecuador, South America.

Steve Gettle / Atreus Owl (Caligo atreus) butterfly wing with false eyespot, Ecuador

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

Thomas Marent / Boomerang Owl (Caligo oedipus) butterfly wing showing false eyespot, Tatama National Park, Colombia

Thomas Marent / Atreus Owl (Caligo atreus) butterfly, Tatama National Park, Colombia

Alex Hyde / Owl Butterfly (Caligo sp.) resting amongst understory vegetaion, Manu Biosphere Reserve, Amazonia, Peru. November.

Juan Carlos Munoz / Owl butterflies (Caligo sp) fully emerged adults and pupae.

Joao Burini / Owl butterfly (Caligo sp), Intervales State Park, Sao Paulo, Atlantic Forest South-East Reserves, UNESCO World Heritage Site, Brazil.

Joao Burini / Scales of a Owl butterfly (Caligo sp) magnified 28x, deceased insect found in Tapirai Sao Paulo, Brazil. South-east Atlantic forest.

Hermann Brehm / Brazilian owl butterfly (Caligo brasiliensis), Brazil