The Ultronia Underwing is a medium-sized underwing moth with mottled gray-and-black forewings and bright red hindwings with a broad black median band. It is one of the most commonly encountered underwing moths at lights across the eastern United States. Like its relatives it rests cryptically on bark by day.
Best time to see a Ultronia Underwing
The best time to see a Ultronia Underwing is June–July, when about 65% of U.S. sightings happen, based on 4,381 research-grade iNaturalist observations.
Not certain it is a Ultronia Underwing? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent Ultronia Underwing sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
Spot a Ultronia Underwing? Identify it instantly.
Point Huck at any plant, bird, or animal for an instant ID, its rarity, and a live map of where it is being seen near you.
Get HuckGet an alert when a Ultronia Underwing is spotted
Pick a park, state, or city and we’ll email you when one turns up there. One check a day, only when there’s something new.
Free. Unsubscribe from any email. See our Privacy Policy.
Love insects & arthropods? Get Huck field notes
Spotting tips, new species, and the best of what people are finding in the wild - straight to your inbox.