Olive Drake Mayfly vs Pale Evening Dun
Side-by-side species comparison
| Attribute | Olive Drake Mayfly | Pale Evening Dun |
|---|---|---|
| Scientific Name | Ephemera lineata | Heptagenia adaequata |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Ephemeridae | Heptageniidae |
| Size | 15-22 mm | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Olive Drake Mayfly
A large burrowing mayfly with distinctive mottled brown wings. Nymphs excavate U-shaped burrows in sandy stream bottoms.
Did You Know?
Mass emergences at dusk can be so dense they appear on weather radar.
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.