Blue Shieldbug Zicrona caerulea A very pretty 5 mm. long, shining metallic blue or green shieldbug. This predatory shieldbug feeds on leaf-beetle larvae in open situations, usually on heathland and moorland. In particular, larvae of flea-beetles (Altica spp.) have been recorded as prey items.Widespread but local in Cumbria, the Blue Shieldbug has been found on lowland mosses, lowland heaths, heather-clad fellsides and rough grassland and scrub.photo: adult, 'blue form' Species checklist page Back to the Shieldbugs page