Community identification
Evergreen Bagworm
Thyridopteryx ephemeraeformis
- Order & Family
- Order Lepidoptera, Family Psychidae
- Size
- Cases range from 1 to 2 inches (2.5 to 5 cm) in length.
Natural Habitat
Found on a variety of host trees including juniper, cedar, arborvitae, and other evergreens or deciduous trees.
Diet & Feeding
Larvae feed on the foliage of host trees, primarily needles and leaves.
Behavior Patterns
Larvae construct spindle-shaped cases made of silk and plant debris for protection. They carry these cases as they feed. Females are wingless and remain in the bag for their entire life, while males develop into black moths.
Risks & Benefits
They are considered a significant landscape pest; heavy infestations can completely defoliate and kill host trees. They serve as a food source for some birds and parasitic wasps.