vaskokiil

Vaskokiil is a colloquial term used in some Finnish-speaking regions to refer to a specific type of beetle, most commonly associated with the genus Meloe. These beetles are more formally known as blister beetles. Vaskokiil are characterized by their soft, leathery elytra (wing covers) and often vibrant metallic coloration, which can range from coppery red to blue or green, giving them their common name.

These insects belong to the family Meloidae. A notable feature of vaskokiil is their defensive mechanism. When threatened, they can secrete a foul-smelling and irritating fluid containing cantharidin from their leg joints. This substance can cause blistering on the skin of predators, hence the common name "blister beetle." Cantharidin is a potent toxin, and historically, it has been used in traditional medicine, though its use is now largely discouraged due to its toxicity and side effects.

The life cycle of vaskokiil is also quite unique. They are parasitic in their larval stage, with the first-instar larvae being active and seeking out host insects, typically solitary bees or grasshoppers. Once attached to a host, the larva feeds on the host's eggs or developing young. Adult vaskokiil are herbivores, feeding on plant matter. Their presence in an area can be an indicator of specific plant species and the availability of their preferred host insects.