Grannom Caddisfly vs Eastern Weighted Casemaker
Side-by-side species comparison
| Attribute | Grannom Caddisfly | Eastern Weighted Casemaker |
|---|---|---|
| Scientific Name | Brachycentrus subnubilus | Goera stylata |
| Order | Trichoptera | Trichoptera |
| Family | Brachycentridae | Goeridae |
| Size | 8-12 mm | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Detritivores | Omnivores |
| Regions | Europe | Europe |
| Conservation | Least Concern | Least Concern |
Grannom Caddisfly
A small dark caddisfly that produces massive spring hatches on European rivers. Larvae build distinctive square-sectioned cases from silk and plant fibers.
Did You Know?
Grannom hatches are so dense on some rivers that local people historically swept up mounds of dead adults to use as fertilizer.
Eastern Weighted Casemaker
A caddisfly of clean European streams that builds mineral cases with large lateral ballast stones. Larvae scrape algae from rock surfaces in moderate current.
Did You Know?
The lateral ballast stones are so precisely placed they appear to be glued on by hand.