The White Underwing is a striking underwing moth where white replaces the red of most relatives, bearing black banding on brilliant white hindwings. Its gray-and-white forewing pattern mimics the gray bark of the birch and aspen trees it inhabits. It is one of the largest and most beautiful members of the Catocala genus.
Best time to see a White Underwing
The best time to see a White Underwing is August–September, when about 83% of U.S. sightings happen, based on 1,900 research-grade iNaturalist observations.
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Recent White Underwing sightings near you
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