Insects nocturnal

North American Luna Moth

Actias luna

A breathtaking emerald of the night, the Luna Moth is a short-lived wonder of the backyard world. With its long flowing tails and luminous green wings, spotting one is a highlight for any nature enthusiast.

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Quick Identification

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Size

Wingspan typically ranges from 7.5 to 10.5 cm (3 to 4.5 inches); total length including tails can exceed 12 cm (5 inches).

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Colors

Luminous lime-green wings with a reddish-purple or brown leading edge; four distinct circular eyespots with transparent centers; males have large, feathery light-brown antennae.

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Key Features

Distinctive long, tapering tails on the hindwings
Pale lime-green coloration unlike any other large North American moth
Four translucent eyespots ringed in yellow, white, and black
Large, plumose (feathery) antennae used by males to detect pheromones

When You’ll See Them

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Activity pattern nocturnal

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Peak hours 10:00 PM - 2:00 AM

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Season May through July (Northern regions have one brood; Southern regions may have up to three)

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Diet Adult Luna Moths do not eat. As caterpillars, they forage on the leaves of deciduous trees including Walnut, Hickory, Sweetgum, Paper Birch, and Persimmon.

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Habitat Deciduous woodlands and suburban neighborhoods with plenty of hardwood host trees.

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Behavior

The Luna Moth is one of North America’s most ethereal sights, often described as a 'living emerald.' These giant silk moths have a fascinatingly brief adult life, lasting only about seven to ten days. Because they emerge from their cocoons without functional mouthparts, they do not eat as adults; their entire existence is dedicated to finding a mate and, for females, laying eggs on suitable host plants.

As nocturnal creatures, they spend their days resting motionless on the undersides of leaves or tree trunks where their green color provides excellent camouflage. At night, they take to the air with a somewhat erratic, floppy flight pattern. Males are particularly active fliers, using their sensitive antennae to track the pheromone trails released by females from miles away.

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Camera Tips

Capturing a Luna Moth on camera requires a different strategy than mammals because they aren't motivated by food. Instead, they are highly attracted to light. The most effective way to photograph them is to set up a 'moth sheet'—a white bedsheet hung vertically with a UV light or a strong LED shining directly onto it. Place your camera on a tripod facing the sheet. Luna Moths will often land and remain perfectly still for long periods, allowing for incredible macro shots.

If you prefer a more natural setting, position your camera near host trees like Walnut or Sweetgum. Since Luna Moths are erratic fliers, use a fast shutter speed (at least 1/250s) if you hope to catch them in motion, but a slower shutter with a ring flash is ideal for stationary shots to capture the intricate scales on their wings. Set your camera to trigger on motion only if you have a high-quality sensor that can handle low-light conditions without excessive noise.

Placement height should be between 3 to 6 feet off the ground, as they often flutter at this level when searching for mates or host plants. Because they are only active for a few weeks a year, timing is critical. Check local sightings in late spring and early summer, and ensure your camera is ready during the first few hours after total darkness. Avoid using heavy scents or perfumes near the camera, as you don't want to interfere with the pheromone trails the males are trying to follow.

Similar Species

Species that look similar or are commonly confused with North American Luna Moth.

Polyphemus Moth

Brownish-tan in color with much larger, prominent 'owl' eyespots and no long tails on the hindwings.

Promethea Silkmoth

Much darker in color (deep maroon or black) and lacks the long green tails and lime-green hue of the Luna.

Frequently Asked Questions

Luna Moths are strictly nocturnal. They are most active during the deep night, typically between 10:00 PM and 2:00 AM, though they may be seen resting near porch lights in the early morning hours.

The best way to attract Luna Moths is to plant host trees such as Black Walnut, Hickory, or Sweetgum. Additionally, using a UV light or 'blacklight' against a white surface at night can draw them in from the surrounding woods.

Adult Luna Moths do not eat at all; they don't even have mouths! They live off the energy stored from their time as caterpillars. As larvae, they eat the leaves of several deciduous tree species.

Yes, they are relatively common in suburban areas that have mature hardwood trees. However, they are often overlooked because of their short adult lifespan and nocturnal habits.

The Luna Moth is easily distinguished by its vivid lime-green color and exceptionally long hindwing tails. No other large moth in North America possesses this specific combination of color and tail length.

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