Adult Size: Length: ca. 12.0 to13.5 mm.
Identifying features: Green Shield Bugs have a very flattened body. Palomena prasina is a large bright green insect, finely punctured with dark marks and with a dark wing membrane and slight lateral extension to the pronotum. The 4th and 5th segments of the antennae are reddish in colour. It becomes a dark reddish-brown in winter, returning to green again in the spring.
Habitat: Woodlands, hedgerows, parks, gardens and waste ground.
There is one generation per year
Adult: Mainly September until July. Although it has also been recorded in August. In the autumn they turn brown before hibernating in leaf litter.
Larvae: June until early October, feeding on a large variety of native and alien broad-leaved trees and shrubs. Later larvae are often darker than those found earlier in the season.
Distribution: Very common and widespread in southern and central England, Wales and Ireland, becoming scarcer further north.
North Merseyside Distribution Map
Identification can be confusing because they change appearance as they grow.
Piezodorus Iituratus: In spring this species is yellow- green, with a yellow edge all round. It has pinkish-red antennae and pale blue edges to the corium. The pronotum is not laterally extended as in Palomena prasina.
Newly-emerged adults may show a pale wing membrane, leading to possible confusion with Nezara viridula a rare, newly naturalised species that is almost entirely green, lacking any dark punctures and three to five pale markings at the base of the scutellum.
Bantock & Botting (2018)
Evans & Edmondson (2005)
Judd (2009 & 2010)
Pendleton & Pendleton (1997—2018)
Wikimedia Commons (2018)