Laufkäfer Carabus problematicus
by de:Benutzer:Tortuosa (CC-BY-SA-3.0)
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Violet Ground Beetles are large, textured, metallic black insects. This particular species of violet ground beetle is less common than that of Carabus violaceus, with Carabus problematicus showing a stronger preference for woodland and heathland habitats. These beetles can't fly, although they are excellent runners. Their long legs give them the power to chase and hunt prey, which can vary from slugs to snails, leather jackets and more. And, it's not just the adults who can help keep garden pests at bay, because the larvae will hunt these pests too. They are nocturnal, so you're most likely to see them hiding beneath rocks and leaf litter during the daytime.
These beetles are predatory insects that will hunt the pests in your garden.
These insects are a resource for other wildlife and can provide beneficial ecosystem services.
These are beautiful beetles. They can grow up to 3cm big. The elytra (wingcases) are mainly black and oval-shaped, with indented dimples running vertically down the length of them. There is metallic-purple rim bordering the elytra and thorax. These beetles are very similar to Carabus violaceus. The best way to distinguish them is by the elytra, where Carabus problematicus possesses more pronounced indenting. Larvae lack wingcases and are highly segmented. They look similar to a Devil's Coach Horse beetle, but completely lacking the elytra with a reduced thorax. They are shiny black with tan-brown heads and can be anywhere between 0.5-2cm.
These insects are beneficial insects that can help control pest populations.
Europe and Japan.
These insects provide beneficial ecosystem services and should not be removed from the wider environment.