Spring Stonefly vs Mahogany Dun
Side-by-side species comparison
| Attribute | Spring Stonefly | Mahogany Dun |
|---|---|---|
| Scientific Name | Amphinemura sulcicollis | Isonychia harperi |
| Order | Plecoptera | Ephemeroptera |
| Family | Nemouridae | Isonychiidae |
| Size | 6-9 mm | 13-17 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
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.
Mahogany Dun
A large reddish-brown mayfly with impressive filter-feeding forelegs. Nymphs prefer moderate to fast riffles with clean gravel substrates.
Did You Know?
Adults hold their forelegs forward in flight, making them easy to identify on the wing.