Green Stonefly vs Northern Stonefly
Side-by-side species comparison
| Attribute | Green Stonefly | Northern Stonefly |
|---|---|---|
| Scientific Name | Alloperla caudata | Nemoura arctica |
| Order | Plecoptera | Plecoptera |
| Family | Chloroperlidae | Nemouridae |
| Size | 8-12 mm | 6-10 mm |
| Habitat | Mountains | Rivers & Streams |
| Diet | Detritivores | Herbivores |
| Regions | North America | Arctic Scandinavia, Finland, northern Russia, Iceland, Arctic Canada |
| Conservation | Least Concern | Least Concern |
Green Stonefly
A small bright green stonefly found along clean mountain streams in North America. Despite its small size, it is an important indicator of excellent water quality.
Did You Know?
The presence of green stoneflies in a stream is considered strong evidence of pristine water quality by aquatic biologists.
Northern Stonefly
A small, dark brown stonefly with two long cerci at the tip of the abdomen. Adults hold their wings flat over the body. Nymphs develop in cold, well-oxygenated streams and are indicators of clean water.
Did You Know?
Stonefly nymphs are so sensitive to pollution that their presence in a stream is used as an indicator of excellent water quality.