Hickory Horned Devil vs Autumn Dun
Side-by-side species comparison
| Attribute | Hickory Horned Devil | Autumn Dun |
|---|---|---|
| Scientific Name | Citheronia regalis | Leptophlebia marginata |
| Order | Lepidoptera | Ephemeroptera |
| Family | Saturniidae | Leptophlebiidae |
| Size | 150 mm (caterpillar), 130-155 mm wingspan (adult) | 10-14 mm |
| Habitat | Woodlands | Woodlands |
| Diet | Herbivores | Detritivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Hickory Horned Devil
The largest caterpillar in North America at up to 150 mm, with dramatic curved horns and fearsome appearance. Despite looking terrifying, it is completely harmless.
Did You Know?
Despite being the most terrifying-looking caterpillar in North America with its huge curved horns, the hickory horned devil is completely harmless — it cannot sting or bite.
Autumn Dun
A dark-winged mayfly that emerges in spring despite its common name. Nymphs inhabit slow-flowing sections of woodland streams among leaf litter.
Did You Know?
Its common name refers to the brownish autumnal color of the adult, not its emergence season.