Western Iron Dun vs Flat-headed Mayfly
Side-by-side species comparison
| Attribute | Western Iron Dun | Flat-headed Mayfly |
|---|---|---|
| Scientific Name | Epeorus longimanus | Epeorus assimilis |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Heptageniidae | Heptageniidae |
| Size | 10-14 mm | 10-14 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Herbivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Western Iron Dun
An iconic eastern mayfly that signals the start of spring fly-fishing season. Nymphs have only two tails and cling to rocks in fast current.
Did You Know?
It was named after Theodore Gordon, considered the father of American dry-fly fishing.
Flat-headed Mayfly
A stream-dwelling mayfly nymph with a flattened body for clinging to rocks in rapids.
Did You Know?
Its flattened nymph shape allows it to live in the boundary layer of fast currents.