Comparison of butterflies and moths
A common classification of the Lepidoptera involves their differentiation into butterflies and moths. Butterflies are a natural monophyletic group, historically treated as the suborder Rhopalocera, which includes Papilionoidea (true butterflies), Hesperiidae (skippers), and Hedylidae (butterfly moths).
Source: Wikipedia — Comparison of butterflies and moths (CC BY-SA 4.0)