American Grannom vs Limnephiloid Snail Caddis
Side-by-side species comparison
| Attribute | American Grannom | Limnephiloid Snail Caddis |
|---|---|---|
| Scientific Name | Brachycentrus americanus | Helicopsyche limnella |
| Order | Trichoptera | Trichoptera |
| Family | Brachycentridae | Helicopsychidae |
| Size | 9-13 mm | 4-6 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | North America | Asia |
| Conservation | Least Concern | Least Concern |
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.
Limnephiloid Snail Caddis
A tiny caddisfly that builds a perfectly spiraled case from fine sand grains cemented with silk. Larvae scrape algae from rock surfaces in clear streams.
Did You Know?
The coiled case provides structural strength far exceeding that of a simple tube of the same material.