Dark Hendrickson Mayfly vs Flat-headed Mayfly
Side-by-side species comparison
| Attribute | Dark Hendrickson Mayfly | Flat-headed Mayfly |
|---|---|---|
| Scientific Name | Leptophlebia cupida | Epeorus assimilis |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Leptophlebiidae | Heptageniidae |
| Size | 8-12 mm | 10-14 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Herbivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Dark Hendrickson Mayfly
A dark-bodied spring mayfly important to trout anglers in the Northeast. Nymphs inhabit leaf packs and debris in slow to moderate stream sections.
Did You Know?
It often emerges alongside Ephemerella subvaria, and the two species together form the famed Hendrickson hatch.
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.