Giant silkworm moths

Definition

A common name for the moth family Saturniidae, encompassing large-bodied species with reduced or non-functional mouthparts in adults. Larvae typically possess prominent tubercles or branched spines and feed on woody plants; many produce silk cocoons, though commercial silk production is limited compared to Bombyx mori. Adults are characterized by broad wings, often with eyespots or translucent patches, and feathery antennae (especially males). The group includes some of the largest Lepidoptera by wingspan and mass.

Etymology

From 'giant' (large size), 'silkworm' (larval silk production), and 'moths' (Lepidoptera); applied to Saturniidae to distinguish from the domesticated silkworm (Bombycidae: Bombyx mori).

Example

The luna moth (Actias luna) and cecropia moth (Hyalophora cecropia) are familiar North American giant silkworm moths whose adults survive solely on larval fat reserves, lacking functional mouthparts.

Synonyms

• Saturniidae
• giant silk moths

Related Terms

• Saturniidae
• Bombycidae
• silkworm
• Lepidoptera
• eyespot
• pectinate antennae
• aposematism
• pupal diapause

Usage Notes

Not a formal taxonomic rank but a widely used vernacular designation. Some specialists prefer 'giant silk moths' to avoid confusion with true silkworms (Bombycidae). The family includes approximately 2,300 described species globally, with highest diversity in the Neotropics and Indo-Malayan regions. Many species are declining due to habitat loss and introduced parasitoids (e.g., Compsilura concinnata).