Great Grey Sedge vs American Grannom
Side-by-side species comparison
| Attribute | Great Grey Sedge | American Grannom |
|---|---|---|
| Scientific Name | Arctopsyche grandis | Brachycentrus americanus |
| Order | Trichoptera | Trichoptera |
| Family | Hydropsychidae | Brachycentridae |
| Size | 20-30 mm | 9-13 mm |
| Habitat | Mountains | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | North America | North America |
| Conservation | Least Concern | Least Concern |
Great Grey Sedge
One of the largest net-spinning caddisflies in North America with a wingspan over 40 mm. Larvae build robust catch-nets in powerful mountain torrents.
Did You Know?
Larvae are partially predatory, consuming small invertebrates trapped in their nets alongside organic debris.
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.