Luna Moth Facts: Luna Moth Pictures and Information: Discover One Of The Largest Moths Of North America

Luna moth facts, pictures and in-depth information.


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What Is A Luna Moth?

luna moth on tree

The luna moth is a large green moth found in North America (the species occasionally also appears in Western Europe as a vagrant). It is a member of the subfamily Saturniinae, within the family Saturniidae (the giant silk moth family).

Easily identified due to its large size, lime-green color, and the long, tail-like extensions of the hindwings, the luna moth flies at night and is typically found in deciduous hardwood woodlands and forests.

Read on to find out more about this distinctive American moth…


Luna Moth Facts (At A Glance)

  • Scientific name: Actias luna
  • Type of Animal: Insect
  • Animal Family: Saturniidae (the giant silk moth family)
  • Where Found: North America
  • Pupae Body Length: 2.75 to 3.5 in. (7.0 to 8.9 cm)
  • Adult Wingspan: 3 to 7 inches (7.6 to 17.8 cm)
  • Conservation Status: Secure (source)

Other Luna Moth Facts

  • In its adult form the luna moth’s mouthparts are non-functioning and the insect does not eat. It lives off energy stored up from its pupal stage.
  • The luna moth only lives for around seven days in its adult form.
  • Luna moth larvae (caterpillars) feed on the leaves of a variety of broadleaf trees, including white birch, American persimmon, American sweet gum, and species of hickory, walnut and sumac.
  • Luna moth larvae regurgitate their food in order to deter predators, and also make a clicking sound as a warning by rubbing their serrated mandibles (jaws) together.
  • The long, tail-like extensions of the adult’s hindwings are thought to confuse the echolocation of bats that feed on the moths.

How To Identify A Luna Moth

luna moth

In its adult form the luna moth is easily identified due to its combination of large size, pale green color and hindwing tails. Its unique appearance means that it is easily distinguished from other North American species.

On each of the luna moth’s four wings is a single, pale eyespot with a darker, ‘eyebrow’-like top edge.

luna moth wings close up

A thick dark stripe runs along the front edge of the insect’s forewings and over the head. Thin reddish and white stripes run along the rear edges of both the front and hind wings.

The luna moth has prominent, feathery antennae. Those of the male are especially feathery.

Close up of luna moth head

The luna moth wingspan is between 3 and 7 inches (7.6 and 17.8 cm), making the species one of the largest moths of North America.

How To Identify A Luna Moth Caterpillar

luna moth caterpillar
Benny Mazur / CC BY [2.0]
A luna moth larva (caterpillar) is large (up to 3.5 in. (8.9 cm) and bright green in color. Its body is divided into bulbous segments, each of which has a yellow line close to the rear edge. A yellow stripe and three rows of brown-colored bumps run along each side of the caterpillar’s body.


Where Are Luna Moths Found?

In the United States, luna moths are found east of North Dakota in the north to east Texas in the south. In Canada, the species is present from Saskatchewan eastwards.

Is It Rare To See A Luna Moth?

Although relatively common, the luna moth is rarely seen due to its nocturnal lifestyle and short lifespan as an adult. Because adults do not feed, they are not seen on flowers collecting nectar.

Is The Luna Moth Endangered?

The luna moth is not currently threatened. Its conservation status is ‘Secure’.

Luna Moth Habitat

Typical luna moth habitat is deciduous woodland. The species may be found in any habitat containing its host trees. The luna moth spends the first two stages of its life (egg and larva) in a tree, only descending to the ground prior to spinning the silk cocoon in which it pupates.

luna moth on wall


Luna Moth Life-Cycle

In the southernmost parts of the luna moth’s range adults begin to emerge in February, and there may be up to three generations per year.

In more northerly regions, adults emerge in May and June, and only one generation will appear each year.

Female luna moths emit pheromones (scent chemicals) to attract males. After mating, the female will lay between 200 and 400 eggs on the undersides of the leaves of its food plants. The eggs hatch after around 14 days.

As the pupa grows, it sheds its skin every 4 to 10 days, with each stage being known as an ‘instar’. A luna moth goes through five instars before pupating. It will spend a total of 6 to 7 weeks in its larval form.


5 thoughts on “Luna Moth Facts: Luna Moth Pictures and Information: Discover One Of The Largest Moths Of North America”

  1. I have a Luna Moth in my apartment and has laid eggs on my wall. What am I supposed to do? I will not kill them. I love them.

    Reply
    • Ideally the eggs should be left alone. If the eggs are hard they can be moved with extreme care, ideally with a delicate paintbrush. If the eggs are soft they should be left where they are – they may harden in a few days. If the eggs won’t move then don’t force them – they should be left in place.

      Reply
  2. I have a luna caterpillar that has begun its process. How long before it hatches, we have it in a gallon jar with sticks and its curled up in a leave. How do I ensure this moth hatches?

    Reply

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