Cottonwood Borer vs Grannom Caddisfly
Side-by-side species comparison
| Attribute | Cottonwood Borer | Grannom Caddisfly |
|---|---|---|
| Scientific Name | Plectrodera scalator | Brachycentrus subnubilus |
| Order | Coleoptera | Trichoptera |
| Family | Cerambycidae | Brachycentridae |
| Size | 25-40 mm | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Root Feeders | Detritivores |
| Regions | Central and eastern United States | Europe |
| Conservation | Least Concern | Least Concern |
Cottonwood Borer
A large longhorn beetle with bold black and white patterning and long antennae. Its larvae bore into the roots and lower trunks of cottonwood and willow trees.
Did You Know?
When handled, it produces a loud squeaking sound by rubbing parts of its thorax together.
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.