Giant Stonefly vs Needle Stonefly
Side-by-side species comparison
| Attribute | Giant Stonefly | Needle Stonefly |
|---|---|---|
| Scientific Name | Pteronarcys californica | Leuctra fusca |
| Order | Plecoptera | Plecoptera |
| Family | Pteronarcyidae | Leuctridae |
| Size | 30-50 mm body | 6-10 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Herbivores | Herbivores |
| Regions | North America | Europe, Asia |
| Conservation | Least Concern | Least Concern |
Giant Stonefly
Large aquatic insects whose nymphs require pristine, cold, oxygen-rich streams. Adults are poor fliers and stay near water. Important food source for trout.
Did You Know?
Stonefly nymphs are so sensitive to water pollution that their presence is used by scientists as a living indicator of water quality — no stoneflies means polluted water.
Needle Stonefly
A small slender stonefly that rolls its wings tightly around its body at rest, giving it a needle-like appearance. Common in small streams across Europe.
Did You Know?
Needle stoneflies are among the most pollution-sensitive aquatic insects and disappear quickly from streams affected by acid rain.