Giant Salmonfly vs Giant Stonefly
Side-by-side species comparison
| Attribute | Giant Salmonfly | Giant Stonefly |
|---|---|---|
| Scientific Name | Pteronarcys princeps | Pteronarcys californica |
| Order | Plecoptera | Plecoptera |
| Family | Pteronarcyidae | Pteronarcyidae |
| Size | 35-50 mm | 30-50 mm body |
| Habitat | Mountains | Rivers & Streams |
| Diet | Detritivores | Herbivores |
| Regions | North America | North America |
| Conservation | Least Concern | Least Concern |
Giant Salmonfly
A massive stonefly of western mountain rivers with a three-year nymphal life cycle. Nymphs feed on decomposing leaf material in cold streams.
Did You Know?
Adults are among the largest flying insects in North America and can barely sustain flight due to their weight.
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.