Autumn Dun vs Light Cahill Mayfly
Side-by-side species comparison
| Attribute | Autumn Dun | Light Cahill Mayfly |
|---|---|---|
| Scientific Name | Leptophlebia marginata | Heptagenia solitaria |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Leptophlebiidae | Heptageniidae |
| Size | 10-14 mm | 9-13 mm |
| Habitat | Woodlands | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
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.
Light Cahill Mayfly
A pale-colored mayfly highly prized by fly fishers for imitating hatches. Nymphs prefer moderate current over gravel substrates.
Did You Know?
The Light Cahill dry fly pattern, designed to mimic this species, has been used since the 1880s.