The Saturniidae, commonly known as saturniids, are among the largest and most spectacular of the moths. They form a family of Lepidoptera, with an estimated 2,300 described species worldwide. The Saturniidae include such Lepidoptera as the giant silkmoths, royal moths and emperor moths. Adults are characterized by large size, heavy bodies covered in hair-like scales, lobed wings, reduced mouthparts, and small heads.