October Caddis vs Rock Caddisfly
Side-by-side species comparison
| Attribute | October Caddis | Rock Caddisfly |
|---|---|---|
| Scientific Name | Dicosmoecus gilvipes | Goera calcarata |
| Order | Trichoptera | Trichoptera |
| Family | Limnephilidae | Goeridae |
| Size | 20-28 mm | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Herbivores | Omnivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
October Caddis
A large orange-bodied caddisfly that hatches in autumn on western North American rivers. It is one of the most important late-season food sources for steelhead and salmon.
Did You Know?
October caddis larvae build massive cases from pebbles and can be so abundant that they visibly alter the streambed substrate.
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.