description Ailanthus webworm moth Overview
The Ailanthus webworm moth is a small insect in the family Attevidae, found across much of North and Central America. Adult moths display distinctive bright orange forewings marked with white spots outlined in black, and they are notably active during daylight hours, unlike most moth species. The larvae feed on tree of heaven (Ailanthus altissima) and related plants in the family Simaroubaceae, spinning communal silk webs around the host's foliage. The species' range in North America has expanded alongside the widespread introduction and spread of Ailanthus, an invasive tree native to China.
help Ailanthus webworm moth FAQ
What do Ailanthus webworm moths look like?
These small insects display distinctive bright orange forewings marked with white spots that are carefully outlined in black. Their vibrant, wasp-like coloring makes them easily recognizable compared to typical drab moth species.
Are Ailanthus webworm moths active at night?
Unlike most moth species, adult Ailanthus webworms are notably active during daylight hours. You can frequently spot them feeding on nectar from flowers in full sunshine during the summer.
What do Ailanthus webworm caterpillars eat?
The caterpillars feed primarily on the leaves of the Tree of Heaven (Ailanthus altissima), which is how the moth gets its common name. They create messy webbed nests in the branches of these invasive trees to protect themselves while feeding.
Are Ailanthus webworm moths invasive to North America?
The moths are native to North and Central America, but their geographic range in the United States has expanded significantly. This population growth is directly tied to the widespread introduction of their host plant, the invasive Tree of Heaven, across the continent.
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