Scientific name: Palomena prasina
Size: Up to 12mm long
Distribution: Found throughout the UK
Months seen: April to October
Life span: Up to 2 years
Habitat: Hedgerows, woodland edges, parks and gardens
Food: Plant sap
Special features: Green Shield Bugs have a very flattened body. You need to have good eyesight to see them, because they are very well camouflaged amongst the green foliage. They're bright green in summer, and in the autumn they turn brown before hibernating in leaf litter.
Identification can be confusing because Green Shieldbugs change appearance as they grow. The photos above show most of the stages in the life cycle.