The owl butterflies (genus Caligo) are known for their huge eyespots, which resemble owls' eyes. They are found in the rainforests of Mexico, Central, and South America.
Owl butterflies are very large and fly only a few meters at a time, which make it difficult for their avian predators to follow them to their resting place. The butterflies prefer to fly in dusk, when few predators are around. The Latin name may possibly refer to their active periods; Caligo means darkness.
This butterfly was photographed in Thailand.