Sweltsa Green Stonefly vs Eastern Salmonfly
Side-by-side species comparison
| Attribute | Sweltsa Green Stonefly | Eastern Salmonfly |
|---|---|---|
| Scientific Name | Sweltsa borealis | Pteronarcys biloba |
| Order | Plecoptera | Plecoptera |
| Family | Chloroperlidae | Pteronarcyidae |
| Size | 6-9 mm | 30-40 mm |
| Habitat | Forests | Rivers & Streams |
| Diet | Predators | Detritivores |
| Regions | North America | North America |
| Conservation | Least Concern | Least Concern |
Sweltsa Green Stonefly
A small northern green stonefly found in cold boreal and montane streams. Nymphs prey on early-instar chironomids and other tiny larvae.
Did You Know?
This species is one of the most cold-adapted stoneflies and can be active in near-freezing water.
Eastern Salmonfly
A large dark stonefly of Appalachian streams that emerges in late spring. Nymphs process leaf litter and are important detritivores.
Did You Know?
Nymphs retain functional gills throughout development, unlike many stoneflies that lose them with age.