Calleta Silk Moth vs Railroad Worm
Side-by-side species comparison
| Attribute | Calleta Silk Moth | Railroad Worm |
|---|---|---|
| Scientific Name | Eupackardia calleta | Phrixothrix hirtus |
| Order | Lepidoptera | Coleoptera |
| Family | Saturniidae | Phengodidae |
| Size | 85-110 mm wingspan | 30-65 mm (larvae) |
| Habitat | Deserts & Drylands | Underground |
| Diet | Omnivores | Omnivores |
| Regions | Southwestern United States, Mexico | South America |
| Conservation | Least Concern | Least Concern |
Calleta Silk Moth
A dark brown silk moth with striking white crescent markings and a broad white postmedial band on each wing. It is native to the Sonoran Desert and surrounding regions.
Did You Know?
Native peoples historically harvested its cocoons to make rattles and small containers.
Railroad Worm
A beetle larva with 11 pairs of green-glowing lateral organs and a red-glowing headlamp — the only land animal that produces two different colors of bioluminescence simultaneously.
Did You Know?
The railroad worm is the only terrestrial animal that glows in two colors at once — green along its sides like railway car windows and red on its head like a locomotive.