Autumn Dun vs Yellow May Dun
Side-by-side species comparison
| Attribute | Autumn Dun | Yellow May Dun |
|---|---|---|
| Scientific Name | Leptophlebia marginata | Heptagenia sulphurea |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Leptophlebiidae | Heptageniidae |
| Size | 10-14 mm | 10-15 mm |
| Habitat | Woodlands | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | Europe | Europe |
| 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.
Yellow May Dun
A bright sulfur-yellow mayfly common across European rivers during early summer. Its flat nymphs are adapted to fast-flowing water on stony substrates.
Did You Know?
The striking yellow color of this mayfly makes it one of the most easily recognizable species on European rivers.