The European Striped Shieldbug (Graphosoma italicum ssp. italicum) is a striking, easily recognizable true bug native to Europe. Famous for its vibrant red-and-black longitudinal stripes, this 8–12 mm insect relies on its bold colors to warn predators of its foul taste.
Key Facts at a Glance
Appearance: Features an almost round, convex, shield-shaped body. Its upperside has bold, alternating red and black stripes, while its underside is bright red covered in regular black dots. Its antennae and legs are predominantly black.
Diet & Habitat: Commonly found in warm, sunny meadows, gardens, and roadsides. They are specialists on the carrot family (Apiaceae)—like fennel, dill, and wild carrot—preferring to feed on their sap and seeds.
Defense Mechanism: Their bright colors are an example of aposematism (warning coloration). If threatened, they can discharge a foul-smelling, unpalatable secretion, making them highly avoided by birds and other predators.
Lifecycle: They typically have one generation per year. Adults spend the winter in hibernation (under leaf litter or in soil), re-emerging in the spring to mate. The nymphs lack the iconic stripes and are instead primarily brown.
