
Community identification
Bagworm (Larva/Pupa Case fragment)
Thyridopteryx ephemeraeformis
- Order & Family
- Order: Lepidoptera, Family: Psychidae
- Size
- Cases range from 1/4 inch to 2 inches in length.
Natural Habitat
Found on a variety of evergreen and deciduous trees and shrubs, often in residential landscapes.
Diet & Feeding
Larvae feed on leaves and needles of host plants, including cedar, juniper, arborvitae, and oak.
Behavior Patterns
Larvae construct protective silk cases covered with plant debris. Females never leave the bag, while males emerge as moths to mate.
Risks & Benefits
High populations can cause severe defoliation and death of ornamental trees. Not harmful to humans directly, but a significant horticultural pest.