Polyphemus Moth

Natural Habitat

Woodlands, forests, suburban areas, and orchards across North America where host plants are abundant.

Diet & Feeding

Adults do not feed as they lack functional mouthparts. Larvae (caterpillars) feed on the leaves of a wide variety of deciduous trees and shrubs, including oak, maple, birch, willow, elm, and fruit trees.

Behavior Patterns

Nocturnal; adults emerge in spring/early summer; males are strong flyers and attracted to female pheromones. Adults do not feed and live only for a short period (about 1-2 weeks) to reproduce. Larvae (caterpillars) are voracious feeders on host plants.

Risks & Benefits

No risks to humans (non-stinging, non-biting). Benefits include being a pollinator (though indirect for adults, larvae contribute to nutrient cycling) and a food source for birds, bats, and other animals. As defoliators, large caterpillar populations can sometimes cause damage to trees, especially in cultivated settings like orchards, but they rarely threaten the overall health of mature trees.

Identified on: 8/16/2025