This is commonly called an "Owl Butterfly" and it's scientific name is Caligo Memnon. It has the owl eye marking as means of protection against predators, thinking it is an owl instead of a sweet morsel butterfly......it feeds on rotting fruit and has a bluish-purple coloration on the top of its wings. Its wingspan can reach up to 150 mm. It slightly resembles the blue morpho when it is resting with wings folded....however, the blue morpho has the most amazing iridescent blue-lavender coloration imaginable when in flight...a truly spectacular sight.