Leaf-eating caterpillars

Definition

Caterpillars that consume living leaf tissue as their primary food source; a functional feeding guild within Lepidoptera larvae distinguished from stem borers, root feeders, or seed predators. Leaf-eating caterpillars typically possess chewing mandibles and may be external feeders (skeletonizing tissue or consuming entire leaves) or leaf miners (feeding between epidermal layers). Their feeding mode shapes plant–herbivore interactions, community assembly, and forest defoliation dynamics.

Etymology

Compound of 'leaf' (Old English lēaf), 'eating' (Old English etan), and 'caterpillar' (Middle English catirpel/catirpeller, perhaps from Old North French catepelose 'hairy cat').

Example

Fall webworm caterpillars (Hyphantria cuneara) are leaf-eating caterpillars that construct silken tents to feed communally on deciduous foliage, often skeletonizing leaves while leaving major veins intact.

Synonyms

• folivorous caterpillars
• foliage-feeding larvae

Related Terms

• Leaf miners
• skeletonizers
• defoliators
• herbivory
• host plant specificity
• chewing mouthparts
• Lepidoptera
• feeding guild

Usage Notes

Distinguish from 'leaf miners' (internal feeders) when precision matters; 'folivorous' is the technical adjective but is less common in applied entomology. The term is functional rather than taxonomic—leaf-eating caterpillars occur across multiple lepidopteran families. Contrast with 'sap-feeding' or 'wood-boring' larvae.