Original: Butterflies are a natural monophyletic group, often given the sub-order Rhopalocera, which includes Papilionoidea (true butterfiles), Hesperiidae (skippers), and Hedylidae (butterfly moths).
Simplified: Butterflies are a natural monophyletic group. Rhopalocera, which includes Papilionoidea (true butterflies), Hesperiidae (skippers), and Hedylidae (butterfly moths).