Luiz Claudio Marigo / Two Illioneus Giant-owl butterfly (Caligo illioneus) Pantanal of Mato Grosso, Mato Grosso State, Center-west of Brazil.

Luiz Claudio Marigo / Illioneus giant owl butterfly (Caligo illioneus) feeding on gum from tree, Ariosto Island in Teles Pires River, Alta Floresta, Mato Grosso State, Brazil

Albert Lleal / Illioneus Giant Owl (Caligo illioneus) caterpillar, Venezuela

Albert Lleal / Illioneus Giant Owl (Caligo illioneus) on fallen log in forest, Venezuela

Albert Lleal / Illioneus Giant Owl (Caligo illioneus) on flower, Venezuela

Thomas Marent / Illioneus Giant Owl (Caligo illioneus), Tambopata-Candamo Nature Reserve, Peru