Common Water Penny vs Broad Bean Weevil
Side-by-side species comparison
| Attribute | Common Water Penny | Broad Bean Weevil |
|---|---|---|
| Scientific Name | Psephenus herricki | Bruchus rufimanus |
| Order | Coleoptera | Coleoptera |
| Family | Psephenidae | Chrysomelidae |
| Size | 4-6 mm (adults); 6-10 mm (larvae) | 4-5 mm |
| Habitat | Rivers & Streams | Grasslands |
| Diet | Omnivores | Seed Feeders |
| Regions | Eastern North America | Europe, Mediterranean, Western Asia |
| Conservation | Least Concern | Least Concern |
Common Water Penny
A small aquatic beetle whose larvae are flattened and round like a copper penny, clinging to rocks in fast streams. Adults are terrestrial and short-lived.
Did You Know?
Larvae are so flat they can cling to rocks in torrential currents that would wash away most other insects.
Broad Bean Weevil
A compact, dark beetle with grayish pubescence and reddish-brown antennae bases. It is a significant pest of faba beans across Europe and the Mediterranean.
Did You Know?
Adults emerge from stored seeds through a perfectly circular exit hole, leaving distinctive windows in the seed coat.