Blue Shieldbug - Zicrona caerulea


Length 5-7 mm. A medium-sized dark shieldbug with a deep blue-green metallic sheen and a dark wing membrane. The nymphs can resemble early instars of Troilus luridus but the legs of Zicrona caerulea are all dark rather than mottled and the head and pronotum are distinctly bluish.

Identification difficulty

It occurs on low vegetation in many habitats, including heathland, grassland and woodland rides.

When to see it

Adult: All year - mainly July to September

Life History

This bug overwinters as an adult and eggs are laid in the spring. New adults are mainly found from July onwards and there is usually one generation per year. A predatory species, favouring the larvae of certain leaf beetles.

UK Status

It is widespread throughout Britain, particularly in the north, although absent from Ireland.

VC55 Status

Occasional in Leicestershire and Rutland.

be our species champion

Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map