Achilles was a Greek hero of the Trojan War, the central character of Homer's Iliad.

In Morpho achilles patroclus, the dorsal sides of the forewings are black, with two broad vertical bands of brilliant blue.

The undersides of the hindwings are olive brownish, with several ocelli formed by blue, yellow, and red concentric rings.

The caterpillars feed on various species of climbing plants (Dalbergia, Inga, Machaerium, Machaerium aculeatum, Myrocarpus, Platymiscium, and Pterocarpus), while the adults mainly feed on rotting fruits or fermenting juice and tree sap.

This species can be found over a huge range of countries, particularly in Argentina, Suriname, Bolivia, Colombia, Peru, Ecuador, Venezuela, Paraguay, and Brazil.