Inchworm (Geometer moth caterpillar)
Scientific Name: Various species within the family Geometridae (as it's a caterpillar, not a specific adult species can be determined from the image alone)
Order & Family: Lepidoptera (Order), Geometridae (Family)
Size: Typically range from 1 cm to 5 cm (0.4 to 2 inches) in length, depending on the species and developmental stage.
Natural Habitat
Widely distributed in wooded areas, forests, gardens, and other vegetated environments where their host plants are abundant. They are found on the leaves and branches of their food sources.
Diet & Feeding
Herbivorous. Inchworms primarily feed on the leaves of various plants, trees, and shrubs. The specific diet varies greatly depending on the species of geometer moth.
Behavior Patterns
Inchworms move by arching their bodies into a loop, bringing their rear legs up to meet their front legs, and then extending forward. This distinctive movement is due to having fewer prolegs (fleshy, stubby legs on the abdomen) than most caterpillars. They are typically solitary and can be found on host plants. When disturbed, some species may drop from the plant on a silk thread or stand rigid, mimicking a twig.
Risks & Benefits
Generally low risk to humans. Some species can be considered pests in agriculture or forestry if their populations boom, leading to defoliation of crops or trees. Benefits include their role as a food source for birds and other invertebrates, and as pollinators in their adult moth stage. They are also part of the natural food web.
Identified on: 7/5/2025