The Great Ash Sphinx is one of North America's largest hawk moths, with a wingspan reaching 4.5 inches and intricately patterned gray-and-white forewings resembling tree bark. It is strongly attracted to light and is one of the most frequently encountered large moths at porch lights across the eastern United States. The pale green or pinkish caterpillar can be found on ash, lilac, and privet in late summer.
Best time to see a Great Ash Sphinx
The best time to see a Great Ash Sphinx is May–August, when about 67% of U.S. sightings happen, based on 1,927 research-grade iNaturalist observations.
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Recent Great Ash Sphinx sightings near you
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