Evolution main content.


Part of the The Butterfly Conservatory exhibition.

Detail of a butterfly with wings folded together, sitting on a leaf. © AMNH/D. Finnin


Many scientists think that the specialized association between today's butterflies and flowering plants suggests that butterflies developed during the Cretaceous Period, often called the "Age of Flowering Plants," 65 million to 135 million years ago—a time when dinosaurs also roamed the earth.

Evolutionary relationships among major Lepidopteran groups are not well understood. What we do know is that, despite the attention they receive from scientists and the public alike, butterflies are not the pinnacle of Lepidoptera evolution. One recent theory is that an obscure moth family, the Hedylidae, represents the closest living relatives of the butterflies. Essentially, this theory suggests that butterflies are just a group of brightly colored moths.