Mountain Flathead Mayfly vs Western Iron Dun
Side-by-side species comparison
| Attribute | Mountain Flathead Mayfly | Western Iron Dun |
|---|---|---|
| Scientific Name | Cinygmula ramaleyi | Epeorus longimanus |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Heptageniidae | Heptageniidae |
| Size | 7-10 mm | 10-14 mm |
| Habitat | Mountains | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | North America | North America |
| Conservation | Least Concern | Least Concern |
Mountain Flathead Mayfly
An alpine mayfly restricted to high-elevation cold streams in the Rocky Mountains. Nymphs feed on diatom films on boulder surfaces.
Did You Know?
This species cannot survive in water temperatures above 15 degrees Celsius.
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.