Small Ballast Caddisfly vs American Grannom
Side-by-side species comparison
| Attribute | Small Ballast Caddisfly | American Grannom |
|---|---|---|
| Scientific Name | Silo pallipes | Brachycentrus americanus |
| Order | Trichoptera | Trichoptera |
| Family | Goeridae | Brachycentridae |
| Size | 7-10 mm | 9-13 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | Europe | North America |
| Conservation | Least Concern | Least Concern |
Small Ballast Caddisfly
A small caddisfly that cements large pebbles to its mineral case for ballast in fast water. Found exclusively in clean calcareous streams.
Did You Know?
Larvae select ballast stones of remarkably uniform size relative to their body mass.
American Grannom
A case-building caddisfly whose larvae attach their cases to rocks in fast current and filter-feed. Cases are chimney-shaped and built from silk and plant fragments.
Did You Know?
Larvae can switch between filter-feeding and scraping algae depending on current speed.