Pale Evening Dun vs Trico Mayfly
Side-by-side species comparison
| Attribute | Pale Evening Dun | Trico Mayfly |
|---|---|---|
| Scientific Name | Heptagenia adaequata | Tricorythodes stygiatus |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Heptageniidae | Leptohyphidae |
| Size | 8-12 mm | 3-6 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Detritivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
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.
Trico Mayfly
A tiny mayfly that forms enormous morning spinner falls over calm streams and rivers. Males have distinctive white bodies with black thoraxes.
Did You Know?
Trico spinner falls create such dense blankets of spent mayflies on the water surface that trout gorge themselves to satiation.