Luna Moth

Luna Moth facts at a glance

How big is a luna moth?

An adult luna moth measures 5 cm long — about 3% of the height of an average adult person (1.73 m) — and weighs around 2 g, a small fraction of an average adult’s body weight (70 kg).

What is a group of luna moths called?

Explore more animal collective nouns and baby animal names .

Appearance

The luna moth is among the most striking moths in North America, with broad, pale-green wings, eyespots, and long, twisting tails trailing from the hindwings. Its body is white and furry, and the antennae of males are large and feathery for detecting females. Its size and soft color make it unmistakable when it appears at lights on summer nights.

A brief adult life

Adult luna moths have no functional mouthparts and do not feed, living on energy stored during the caterpillar stage. As a result they survive only about a week, during which their sole purpose is to find a mate and reproduce. Females release pheromones to attract males, which locate them using their sensitive antennae.

Caterpillars and life cycle

Luna moth caterpillars are plump and bright green and feed heavily on the leaves of trees such as walnut, hickory, birch, and sweetgum. After eating and growing through several stages, the caterpillar spins a silken cocoon wrapped in a leaf, where it pupates. Depending on the region there may be one or several generations a year, with the final generation overwintering as a pupa.

Tails and defense

The luna moth's long hindwing tails are more than decoration: as the moth flies, the spinning tails create confusing echoes that disrupt the echolocation hunting bats use to target prey. This can cause bats to strike the harmless tails instead of the body, giving the moth a chance to escape. Their nocturnal habits also help them avoid many daytime predators.

Did you know? Luna Moth facts

• The luna moth is a large, pale-green silk moth of eastern North America, with long, sweeping tails on its hindwings and a wingspan up to about 11 cm (4.5 in).
• Adult luna moths have no functional mouthparts and cannot feed, relying entirely on energy stored as caterpillars. This is why they live only about a week, just long enough to mate and lay eggs.
• The adult luna moth lives only about a week. Most of its life is spent as a caterpillar and pupa, with the whole cycle taking a few months and the final generation overwintering as a pupa.
• Luna moth caterpillars feed on the leaves of trees such as walnut, hickory, birch, and sweetgum. They eat heavily to build the energy reserves the non-feeding adult will rely on.
• The long hindwing tails spin as the moth flies, creating misleading echoes that confuse the echolocation of hunting bats. This can cause a bat to strike the tails rather than the body, helping the moth escape.
• Conservation: Least Concern (IUCN).

Diet & feeding

Luna Moth feeds primarily as a caterpillars eat leaves; adults do not feed. The luna moth is among the most striking moths in North America, with broad, pale-green wings, eyespots, and long, twisting tails trailing from the hindwings. Its body is white and furry, and the antennae of males are large and feathery for det

Adaptations

• The luna moth is among the most striking moths in North America, with broad, pale-green wings, eyespots, and long, twisting tails trailing from the hindwings. Its body is white and furry, and the antennae of males are large and feathery for detecting females. Its size and soft color make it unmistakable when it appears at lights on summer nights.
• Adult luna moths have no functional mouthparts and do not feed, living on energy stored during the caterpillar stage. As a result they survive only about a week, during which their sole purpose is to find a mate and reproduce. Females release pheromones to attract males, which locate them using their sensitive antennae.

Behaviour & ecology

• The luna moth is among the most striking moths in North America, with broad, pale-green wings, eyespots, and long, twisting tails trailing from the hindwings. Its body is white and furry, and the antennae of males are large and feathery for detecting females. Its size and soft color make it unmistakable when it appears at lights on summer nights.
• Adult luna moths have no functional mouthparts and do not feed, living on energy stored during the caterpillar stage. As a result they survive only about a week, during which their sole purpose is to find a mate and reproduce. Females release pheromones to attract males, which locate them using their sensitive antennae.
• Luna moth caterpillars are plump and bright green and feed heavily on the leaves of trees such as walnut, hickory, birch, and sweetgum. After eating and growing through several stages, the caterpillar spins a silken cocoon wrapped in a leaf, where it pupates. Depending on the region there may be one or several generations a year, with the final generation overwintering as a pupa.

Communication

• Luna Moth uses scent, posture, and vocal signals to mark territory and coordinate social behaviour.
• Communication intensity often peaks during breeding seasons and territorial disputes.

Habitat & range

Deciduous forests of eastern North America

Ecological role

Luna Moth participates in pollination, decomposition, or prey-base support for birds and other insectivores.

Conservation status of the Luna Moth

Sources & references

This guide is compiled and reviewed against established zoological and conservation references. Key sources for the Luna Moth:

• IUCN Red List of Threatened Species

  Conservation status (Least Concern) reflects the IUCN Red List category for Actias luna.

• iNaturalist — observations & photos

  Search citizen-science observations and community IDs for Actias luna. Useful for range checks and recent sightings — not a substitute for formal Red List status.

• GBIF — occurrence data

  Global Biodiversity Information Facility species search for Actias luna. Explore published occurrence records used in range research.

• IUCN Red List — Actias luna.

  Conservation status (Least Concern) and population trends.

• Animal Diversity Web — Actias luna. University of Michigan Museum of Zoology.

  Life history, morphology, and range.

• Wikipedia — Luna Moth.

  General taxonomy and overview (cross-check primary sources).

• Global Animal Guide editorial standards

  How we research, source, review, and update every guide for accuracy.