Saturniids include some of the largest winged insects on Earth, with wingspans ranging from roughly 2.5 cm to nearly 30 cm (1 to 12 inches), such as the Atlas moth ( Attacus atlas ) and Hercules moth ( Coscinocera hercules ).
Male saturniids possess long, broad, feather-like antennae designed to detect female pheromones from over a mile away. saturniid moth
Saturniid moths undergo a complete metamorphosis: egg, larva (caterpillar), pupa, and adult. Saturniids include some of the largest winged insects
They lack a frenulum (a structure locking the wings), instead having hindwings that overlap the forewings, giving the impression of a single, continuous, broad wing surface. The Life Cycle: "Survival of the Fattest" giving the impression of a single