Acorn Moth vs Common Bagworm Moth

Side-by-side species comparison

Attribute Acorn Moth Common Bagworm Moth
Scientific Name Blastobasis glandulella Psyche casta
Order Lepidoptera Lepidoptera
Family Blastobasidae Psychidae
Size 15–22 mm wingspan Males 12-15 mm wingspan; females wingless
Habitat Woodlands Underground
Diet Omnivores Wood Feeders
Regions Eastern North America Europe
Conservation Not Evaluated Least Concern

Acorn Moth

A small moth whose larvae bore into and consume the contents of acorns on the forest floor. It is common in oak woodlands across eastern North America.

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Did You Know?

In heavy infestation years, it can destroy over half the acorn crop on the forest floor.

Common Bagworm Moth

A small moth whose larva builds a distinctive portable bag from silk and plant debris that it carries everywhere. Adult females are wingless and never leave their larval bag.

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Did You Know?

The wingless female mates, lays eggs, and dies entirely within the bag she built as a caterpillar.