The Fall Armyworm Moth is one of the most economically destructive moths in the Americas. Its caterpillars are true 'armyworms' — gregarious larvae that march in dense bands across fields devouring every grass plant in their path. Adult moths migrate seasonally across North America, colonizing northern crops each summer. Larvae are identifiable by a distinctive inverted Y on the head.
Best time to see a Fall Armyworm Moth
The best time to see a Fall Armyworm Moth is August–October, when about 70% of U.S. sightings happen, based on 8,177 research-grade iNaturalist observations.
Not certain it is a Fall Armyworm Moth? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Fall Armyworm Moth sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
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