Atlas Moth Identification Guide

Key Features

• One of the largest moths in the world by wing surface area, with a wingspan that can exceed 24–27 cm (9.5–10.5 inches) in large females
• Wings are broad, angular, and reddish-brown to rusty orange, patterned with black, white, and pink lines and large triangular transparent "windows" near the wingtips that let light pass through
• Forewing tips are elongated and curved, each resembling the head of a snake, complete with a dark eye-like marking — a feature thought to startle or deter predators when the moth is at rest
• Thick, furry brown-orange body and legs; feathery, comb-like antennae, especially broad and plume-like in males, used to detect female pheromones from long distances
• No functional mouthparts as adults, so the moth does not feed at this life stage and relies entirely on fat reserves built up as a caterpillar
• Females are generally larger and heavier-bodied than males, with a broader abdomen for egg-laying

Where & When to Spot One

• Native to tropical and subtropical forests of Southeast Asia, including India, China, and Indonesia
• Adults are night-active but are sometimes seen resting on tree trunks or walls during the day, especially near lights after dusk the previous evening
• Adult flight period is brief, generally just one to two weeks, since adults live only to mate and lay eggs before dying
• Multiple generations may occur per year in warm, humid climates, so sightings can happen across most of the warmer and wetter months

Similar Species

• Other giant silk moths, such as the Atlas Moth's close relatives in the genus Attacus, share the huge size and snake-head wingtip pattern, and can be difficult to separate without close inspection of the wing markings
• Cecropia and Polyphemus moths are similarly large but have rounder wings, different color patterns, and are native to North America rather than Asia
• Owl moths in the genus Erebus can rival it in wingspan but have a darker, more mottled gray-brown pattern without the reddish tone or transparent windows
• The combination of extreme wingspan, triangular transparent windows, and curved snake-head wingtips is distinctive among moths worldwide

Quick ID Checklist

• Enormous wingspan (often 20+ cm)
• Reddish-brown wings with triangular clear "windows"
• Curved, snake-head-shaped forewing tips
• Broad, feathery antennae
• Found resting on trees or walls near lights at night in tropical Asia