Cascades Stonefly vs Small-headed Stonefly
Side-by-side species comparison
| Attribute | Cascades Stonefly | Small-headed Stonefly |
|---|---|---|
| Scientific Name | Doroneuria theodora | Perlodes microcephala |
| Order | Plecoptera | Plecoptera |
| Family | Perlidae | Perlodidae |
| Size | 22-30 mm | 15-22 mm body |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Predators | Predators |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Cascades Stonefly
A large predatory stonefly endemic to Cascade Range streams. Nymphs inhabit cold boulder-strewn torrents at moderate elevations.
Did You Know?
Adults drum their abdomens on streamside surfaces to communicate with potential mates.
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.