Invertebrates
Blue Morpho Butterfly
Morpho peleides
Flashing brilliant blue with each wingbeat before vanishing into dull brown camouflage at rest, a blue morpho butterfly produces one of the most striking colour displays in the rainforest without a single grain of blue pigment.
Overview
The blue morpho butterfly, Morpho peleides, is a Least Concern insect found across tropical rainforest from Mexico through Central America into South America. Its brilliant structural blue wing colour, dramatic flickering effect in flight, and camouflaged brown underside make it one of the most visually striking and well-known butterflies in the Americas.
Colour made of structure, not pigment
Rather than relying on blue pigment, which is exceptionally rare in nature, the blue morpho’s wing scales are built from microscopic structures that scatter light to produce the colour directly, the same basic principle behind the blue of a clear sky.
Status
Least Concern, remaining widespread across suitable rainforest habitat throughout its range from Mexico to South America.
Blue Morpho Butterfly: common questions
Why is the blue morpho butterfly's wing colour so vivid?
Its wings contain microscopic scale structures that scatter light in a way that produces brilliant blue colour, a phenomenon called structural colour, entirely different from the way pigments produce colour in most other butterflies.
Why does the blue morpho's colour seem to flash on and off?
As the wings open and close during flight, the vivid blue upper surface alternates with the dull brown underside, creating a flickering effect that can make the butterfly briefly seem to disappear and reappear.
What does the blue morpho butterfly eat?
Adults feed mainly on fermenting fruit juice, tree sap, and fungi rather than visiting flowers for nectar like many other butterflies.
Why is the underside of the blue morpho's wings so different from the top?
The dull brown underside with eyespot patterns offers camouflage when the butterfly rests with its wings closed, hiding the vivid blue that would otherwise make it an easy target for predators.