The Sigmoid Prominent is a small, beautifully patterned prominent moth with brown-and-white wings bearing a distinctive S-shaped dark marking — the sigmoid that gives it its name. It is associated with poplars and aspens. Adults rest with the body arched and wings raised at the front, the characteristic 'prominent' posture.
Best time to see a Sigmoid Prominent
The best time to see a Sigmoid Prominent is March–July, when about 64% of U.S. sightings happen, based on 893 research-grade iNaturalist observations.
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Recent Sigmoid Prominent sightings near you
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