Rock Caddisfly vs Grannom Caddisfly
Side-by-side species comparison
| Attribute | Rock Caddisfly | Grannom Caddisfly |
|---|---|---|
| Scientific Name | Goera calcarata | Brachycentrus subnubilus |
| Order | Trichoptera | Trichoptera |
| Family | Goeridae | Brachycentridae |
| Size | 8-12 mm | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Detritivores |
| Regions | Europe | Europe |
| Conservation | Least Concern | Least Concern |
Rock Caddisfly
A caddisfly of limestone streams whose cases incorporate calcareous sand grains and pebble ballast. Larvae scrape algae from rock surfaces.
Did You Know?
The calcareous case material provides partial camouflage against the pale limestone streambed.
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.