Bagworm Moth Larva

Scientific Name: Thyridopteryx ephemeraeformis

Order & Family: Lepidoptera: Psychidae

Size: 1 to 2 inches (2.5 to 5 cm) at maturity

Bagworm Moth Larva

Natural Habitat

Found on various deciduous and coniferous trees including cypress, juniper, cedar, and oak, as well as on man-made structures.

Diet & Feeding

Generalist herbivores that feed on foliage, including leaves and needles of host plants.

Behavior Patterns

Larvae construct protective cases made of silk and plant debris; they carry these cases while feeding and eventually pupate inside them.

Risks & Benefits

Can cause significant defoliation to landscape trees and shrubs; considered a garden pest but provides food for birds and predatory insects.

Identified on: 6/25/2026