Yellow Stonefly vs Northern Stonefly
Side-by-side species comparison
| Attribute | Yellow Stonefly | Northern Stonefly |
|---|---|---|
| Scientific Name | Isoperla dicala | Nemoura arctica |
| Order | Plecoptera | Plecoptera |
| Family | Perlodidae | Nemouridae |
| Size | 9-13 mm | 6-10 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Predators | Herbivores |
| Regions | North America | Arctic Scandinavia, Finland, northern Russia, Iceland, Arctic Canada |
| Conservation | Least Concern | Least Concern |
Yellow Stonefly
A bright yellow springfly found in clean Appalachian streams. Nymphs are predatory on small invertebrates in gravel substrates.
Did You Know?
Males produce vibrational signals by rubbing their abdomen against the substrate, audible through special sensors.
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.