Western Stone vs Small-headed Stonefly
Side-by-side species comparison
| Attribute | Western Stone | Small-headed Stonefly |
|---|---|---|
| Scientific Name | Doroneuria baumanni | Perlodes microcephala |
| Order | Plecoptera | Plecoptera |
| Family | Perlidae | Perlodidae |
| Size | 25-35 mm | 15-22 mm body |
| Habitat | Mountains | Rivers & Streams |
| Diet | Predators | Predators |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Western Stone
A large predatory stonefly of Pacific Northwest mountain streams. Nymphs have distinctive patterned heads and powerful mandibles.
Did You Know?
Nymphs take up to three years to complete development in cold mountain streams.
Small-headed Stonefly
A large spring-emerging stonefly found in clean upland rivers. Nymphs are predatory, feeding on mayfly and midge larvae. An important bioindicator species.
Did You Know?
Nymphs require the cleanest, most oxygen-rich water of any stonefly, making them sensitive pollution indicators.