The Fall Webworm Moth is a small, white moth (sometimes with brown spots) whose caterpillars build conspicuous, large silk webs enclosing the tips of tree branches in late summer. Despite their alarming appearance, infestations rarely kill trees. Introduced to Europe and Asia in the mid-20th century, it became a significant pest there. Adults are attracted strongly to lights and are common from summer through fall.
Best time to see a Fall Webworm Moth
The best time to see a Fall Webworm Moth is June–September, when about 72% of U.S. sightings happen, based on 48,509 research-grade iNaturalist observations.
Not certain it is a Fall Webworm Moth? What bug is this? walks through what to check first and the lookalikes that catch people out.
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