Whirligig Diving Beetle vs Grannom Caddisfly
Side-by-side species comparison
| Attribute | Whirligig Diving Beetle | Grannom Caddisfly |
|---|---|---|
| Scientific Name | Macrogyrus oblongus | Brachycentrus subnubilus |
| Order | Coleoptera | Trichoptera |
| Family | Gyrinidae | Brachycentridae |
| Size | 12-18 mm | 8-12 mm |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Predators | Detritivores |
| Regions | Africa | Europe |
| Conservation | Least Concern | Least Concern |
Whirligig Diving Beetle
A large whirligig beetle that spins on the water surface of African rivers.
Did You Know?
Its divided compound eyes allow it to see above and below water simultaneously.
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.