Blue-Winged Olive vs Flat-headed Mayfly
Side-by-side species comparison
| Attribute | Blue-Winged Olive | Flat-headed Mayfly |
|---|---|---|
| Scientific Name | Baetis tricaudatus | Epeorus assimilis |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Baetidae | Heptageniidae |
| Size | 5-9 mm | 10-14 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Herbivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Blue-Winged Olive
A small olive-colored mayfly with distinctive bluish-gray wings, abundant in clean streams across North America. It produces multiple generations per year.
Did You Know?
Blue-winged olives are among the few mayflies that hatch in winter, providing vital food for trout during cold months.
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.