The blue morpho's (Morpho peleides) vivid, iridescent blue colouring is a result of the microscopic scales on the backs of their wings, which reflect light. Its underside is a dull brown with many eyespots, providing camouflage against predators such as birds and insects when its wings are closed. Among the largest butterflies in the world, with wings spanning from five to eight inches, blue morphos live in the tropical forests of Latin America from Mexico to Colombia.
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