Fatal Metalmark vs Edwards' Atlas Moth

Side-by-side species comparison

Attribute Fatal Metalmark Edwards' Atlas Moth
Scientific Name Calephelis nemesis Attacus edwardsii
Order Lepidoptera Lepidoptera
Family Riodinidae Saturniidae
Size 18-25 mm wingspan 200-260 mm
Habitat Rivers & Streams Forests
Diet Nectar Feeders Omnivores
Regions Southwestern United States, Mexico Himalayas, from Pakistan to Myanmar
Conservation Least Concern Least Concern

Fatal Metalmark

A tiny dark brown butterfly with fine metallic silver lines across the wings and minute checkered fringes. Despite its ominous name, it is a harmless nectar feeder.

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Did You Know?

The name 'nemesis' refers to the Greek goddess of retribution, though the reason for this dramatic name is unclear.

Edwards' Atlas Moth

A massive Himalayan silk moth rivaling the atlas moth in size, with rich brown wings and large translucent fenestrae. It inhabits high-altitude forests across the Himalayas.

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Did You Know?

Attacus edwardsii was once considered the largest moth in the world before accurate measurements confirmed the atlas moth's slightly greater wing area.