Giant Michigan Mayfly vs Pale Evening Dun
Side-by-side species comparison
| Attribute | Giant Michigan Mayfly | Pale Evening Dun |
|---|---|---|
| Scientific Name | Hexagenia bilineata | Heptagenia adaequata |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Ephemeridae | Heptageniidae |
| Size | 18-28 mm | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Giant Michigan Mayfly
A large burrowing mayfly with two dark stripes on its thorax. Nymphs dig into soft clay and silt bottoms of large rivers.
Did You Know?
Mass emergences along the Great Lakes have caused road closures due to the slippery accumulation of millions of dead adults.
Pale Evening Dun
A flat-bodied mayfly whose nymphs press tightly against rocks in swift currents. Adults emerge at dusk during summer months.
Did You Know?
Its extremely flattened body allows it to resist currents that would sweep away most other insects.