Bug Identifier
Inchworm (Spanworm)
Community identification

Inchworm (Spanworm)

Geometridae (Family)

Order & Family
Order: Lepidoptera; Family: Geometridae
Size
Typically 1 to 2 inches (25 to 50 mm) in length.
See this bug in the Encyclopedia

Natural Habitat

Found globally in gardens, forests, and shrublands, often on the foliage of host plants.

Diet & Feeding

Herbivorous, primarily feeding on the leaves of trees, shrubs, and various crops.

Behavior Patterns

Characterized by a unique looping gait caused by the absence of middle prolegs; many species are masters of camouflage, mimicking twigs to avoid predators.

Risks & Benefits

Generally harmless to humans; however, large populations can cause significant defoliation to trees and agricultural crops, though they serve as a vital food source for birds.