Pale Morning Dun vs Spring Stonefly
Side-by-side species comparison
| Attribute | Pale Morning Dun | Spring Stonefly |
|---|---|---|
| Scientific Name | Ephemerella excrucians | Amphinemura sulcicollis |
| Order | Ephemeroptera | Plecoptera |
| Family | Ephemerellidae | Nemouridae |
| Size | 7-10 mm | 6-9 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Detritivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Pale Morning Dun
A small pale yellowish mayfly that hatches in large numbers on western North American streams during late spring. It is a crucial food source for trout.
Did You Know?
Pale morning duns often hatch in such dense swarms that trout become highly selective, ignoring all but perfect imitations.
Spring Stonefly
A small dark stonefly that emerges in early spring in European streams. Nymphs are shredders of decomposing leaf litter in headwaters.
Did You Know?
Adults are among the first insects to appear each spring, sometimes emerging while snow still covers the banks.