One of several species of beautiful blue Morpho butterflies, all of which are large with iridescent blue wings on the topside and are native to South/Central America.
Blue Morpho species have a brown underside with false "eye-spots" to deter predators. The pattern of eyespots on the underside forewing are variable.
Male and female are similar in appearance (and are attracted to light blue when mating).
The beautiful iridescent blue fades with age, initially leading to a "banded" appearance which could be mistaken for a "Banded Morpho" (separate species).
More of the variable eye-spots on the underside. Centre above shows Morpho having just emerged from chrysalis.