Ailanthus Webworm Moth: Pollinator on an Invasive Host

Striking Little Moth

The ailanthus webworm moth (Atteva aurea) catches attention with its distinctive pattern—orange wings marked with white spots ringed in black, resembling an elongated ladybug. Despite its showy appearance, it's a common visitor to fall flowers.

Host Plant Connection

The caterpillars feed exclusively on tree-of-heaven (Ailanthus altissima), an aggressive invasive tree. This makes the moth a rare example of a native insect utilizing an exotic host. The moths don't damage the tree significantly but don't control it either.

Pollinator Role

Adults are frequent nectar visitors on late-season flowers, particularly sedums. They contribute to pollination while their caterpillars utilize an invasive plant—a net ecological benefit in disturbed landscapes.

No Control Needed

These moths are harmless to gardens, people, and structures. Enjoy their colorful presence on autumn blooms.