Flat-headed Mayfly vs Tiny Winter Black Stonefly
Side-by-side species comparison
| Attribute | Flat-headed Mayfly | Tiny Winter Black Stonefly |
|---|---|---|
| Scientific Name | Epeorus assimilis | Capnia nigra |
| Order | Ephemeroptera | Plecoptera |
| Family | Heptageniidae | Capniidae |
| Size | 10-14 mm | 4-8 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Herbivores | Detritivores |
| Regions | Europe | Europe, Northern Asia |
| Conservation | Least Concern | Least Concern |
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.
Tiny Winter Black Stonefly
A tiny black stonefly that emerges in late winter across European streams. It is among the earliest insects to appear each year.
Did You Know?
Females are often wingless or short-winged, relying on walking rather than flight to find mates.