Sharp-Grooved Diving Beetle vs Cowpea Weevil
Side-by-side species comparison
| Attribute | Sharp-Grooved Diving Beetle | Cowpea Weevil |
|---|---|---|
| Scientific Name | Acilius sulcatus | Callosobruchus maculatus |
| Order | Coleoptera | Coleoptera |
| Family | Dytiscidae | Chrysomelidae |
| Size | 15-18 mm | 2-4 mm |
| Habitat | Ponds & Lakes | Farmland |
| Diet | Predators | Seed Feeders |
| Regions | Europe, Western Asia | Africa (native), pantropical, cosmopolitan |
| Conservation | Least Concern | Least Concern |
Sharp-Grooved Diving Beetle
A medium-sized diving beetle widespread across Europe, recognized by the deeply grooved elytra of females. It is a fast and agile predator in ponds.
Did You Know?
Females have deeply furrowed elytra that prevent males from gripping them, giving them control over mating.
Cowpea Weevil
A small, reddish-brown to dark beetle with mottled elytra and a prominent pygidium bearing two dark spots. It is one of the most destructive pests of stored cowpeas and other pulses.
Did You Know?
Females glue their eggs directly onto the surface of bean seeds, and the larvae bore into the seed immediately upon hatching.